From bfe0553db8f3f23d4e26d9cbbed78a938b354c6c Mon Sep 17 00:00:00 2001 From: numbbbbb Date: Mon, 16 Jun 2014 22:40:12 +0800 Subject: [PATCH] make gitbook --- chapter1/01_swift.html | 30 +++++++-- chapter1/02_a_swift_tour.html | 30 +++++++-- chapter1/chapter1.html | 30 +++++++-- chapter2/01_The_Basics.html | 30 +++++++-- chapter2/02_Basic_Operators.html | 42 ++++++++++--- chapter2/03_Strings_and_Characters.html | 30 +++++++-- chapter2/04_Collection_Types.html | 30 +++++++-- chapter2/05_Control_Flow.html | 30 +++++++-- chapter2/06_Functions.html | 40 +++++++++--- chapter2/07_Closures.html | 30 +++++++-- chapter2/08_Enumerations.html | 30 +++++++-- chapter2/09_Classes_and_Structures.html | 58 ++++++++++++------ chapter2/10_Properties.html | 30 +++++++-- chapter2/11_Methods.html | 30 +++++++-- chapter2/12_Subscripts.html | 30 +++++++-- chapter2/13_Inheritance.html | 30 +++++++-- chapter2/14_Initialization.html | 30 +++++++-- chapter2/15_Deinitialization.html | 30 +++++++-- chapter2/16_Automatic_Reference_Counting.html | 30 +++++++-- chapter2/17_Optional_Chaining.html | 30 +++++++-- chapter2/18_Type_Casting.html | 30 +++++++-- chapter2/19_Nested_Types.html | 30 +++++++-- chapter2/20_Extensions.html | 30 +++++++-- chapter2/21_Protocols.html | 30 +++++++-- chapter2/22_Generics.html | 30 +++++++-- chapter2/23_Advanced_Operators.html | 39 ++++++++---- chapter2/chapter2.html | 30 +++++++-- chapter3/01_About_the_Language_Reference.html | 30 +++++++-- chapter3/02_Lexical_Structure.html | 30 +++++++-- chapter3/03_Types.html | 30 +++++++-- chapter3/04_Expressions.html | 30 +++++++-- chapter3/05_Declarations.html | 30 +++++++-- chapter3/06_Attributes.html | 30 +++++++-- chapter3/07_Patterns.html | 30 +++++++-- .../08_Generic_Parameters_and_Arguments.html | 30 +++++++-- chapter3/09_Summary_of_the_Grammar.html | 30 +++++++-- chapter3/10_Statements.html | 30 +++++++-- chapter3/chapter3.html | 28 ++++++++- cover.jpg | Bin 0 -> 186575 bytes cover_small.jpg | Bin 0 -> 8779 bytes index.html | 30 +++++++-- manifest.appcache | 10 +-- search_index.json | 2 +- 43 files changed, 1046 insertions(+), 193 deletions(-) create mode 100644 cover.jpg create mode 100644 cover_small.jpg diff --git a/chapter1/01_swift.html b/chapter1/01_swift.html index 4f63e80e..f2425651 100644 --- a/chapter1/01_swift.html +++ b/chapter1/01_swift.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
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    - + +
  • + About the author +
    • + +
  • + Questions and Issues +
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  • + Edit and Contribute +
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  • 序 @@ -573,7 +595,7 @@
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    +

    翻译：numbbbbb
    校对：yeahdongcn

    diff --git a/chapter1/02_a_swift_tour.html b/chapter1/02_a_swift_tour.html index 5e17bdf6..33d05072 100644 --- a/chapter1/02_a_swift_tour.html +++ b/chapter1/02_a_swift_tour.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
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      +

      翻译：numbbbbb
      校对：shinyzhu, stanzhai

      diff --git a/chapter1/chapter1.html b/chapter1/chapter1.html index aa4f0d5a..53c4ee4f 100644 --- a/chapter1/chapter1.html +++ b/chapter1/chapter1.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
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        +

        欢迎使用 Swift

        在本章中您将了解 Swift 的特性和开发历史，并对 Swift 有一个初步的了解。

        diff --git a/chapter2/01_The_Basics.html b/chapter2/01_The_Basics.html index 6d71e5e2..b486a288 100644 --- a/chapter2/01_The_Basics.html +++ b/chapter2/01_The_Basics.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
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          +

          翻译：numbbbbb, lyuka, JaySurplus
          校对：lslxdx

          diff --git a/chapter2/02_Basic_Operators.html b/chapter2/02_Basic_Operators.html index 4dbc83a8..8ee94c43 100644 --- a/chapter2/02_Basic_Operators.html +++ b/chapter2/02_Basic_Operators.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
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          @@ -97,12 +102,29 @@ -

          运算符是检查，改变，合并值的特殊符号或短语。例如，加号+将两个数相加（如let i = 1 + 2）。复杂些的运行算例如逻辑与运算符&&（如if enteredDoorCode && passedRetinaScan），又或让 i 值加1的便捷运算符自增运算符++i等。

          -

          Swift 支持大部分标准 C 语言的运算符，且改进许多特性来减少常规编码错误。如，赋值符（=）不返回值，以防止把想要判断相等运算符（==）的地方写成赋值符导致的错误。数值运算符（+，-，*，/，%等）会检测并不允许值溢出，以此来避免保存变量时由于变量大于或小于其类型所能承载的范围时导致的异常结果。当然允许你使用 Swift 的溢出运算符来实现溢出。详情参见溢出运算符。

          +

          运算符是检查、改变、合并值的特殊符号或短语。例如，加号+将两个数相加（如let i = 1 + 2）。复杂些的运算例如逻辑与运算符&&（如if enteredDoorCode && passedRetinaScan），或让 i 值加1的便捷自增运算符++i等。

          +

          Swift 支持大部分标准 C 语言的运算符，且改进许多特性来减少常规编码错误。如：赋值符（=）不返回值，以防止把想要判断相等运算符（==）的地方写成赋值符导致的错误。数值运算符（+，-，*，/，%等）会检测并不允许值溢出，以此来避免保存变量时由于变量大于或小于其类型所能承载的范围时导致的异常结果。当然允许你使用 Swift 的溢出运算符来实现溢出。详情参见溢出运算符。

          区别于 C 语言，在 Swift 中你可以对浮点数进行取余运算（%），Swift 还提供了 C 语言没有的表达两数之间的值的区间运算符，（a..b和a...b），这方便我们表达一个区间内的数值。

          本章节只描述了 Swift 中的基本运算符，高级运算符包含了高级运算符，及如何自定义运算符，及如何进行自定义类型的运算符重载。

          术语

          -

          运算符有一元，二元和三元运算符。

          +

          运算符有一元、二元和三元运算符。

          • 一元运算符对单一操作对象操作（如-a）。一元运算符分前置符和后置运算符，前置运算符需紧排操作对象之前（如!b），后置运算符需紧跟操作对象之后（如i++）。
          • 二元运算符操作两个操作对象（如2 + 3），是中置的，因为它们出现在两个操作对象之间。
            • @@ -621,10 +643,10 @@ a = b // 此句错误, 因为 x = y 并不返回任何值 } -

            这个特性使得你无法把（==）错写成（=）了，由于if x = y是错误代码，Swift 从底层帮你避免了这些代码错误。

            +

            这个特性使你无法把（==）错写成（=），由于if x = y是错误代码，Swift 从底层帮你避免了这些错误代码。

            数值运算

            -

            Swift 让所有数值类型都支持了基本的四则运算：

            +

            Swift 中所有数值类型都支持了基本的四则运算：

            • 加法（+）
            • 减法（-）
              • @@ -637,7 +659,7 @@ a = b 10.0 / 2.5 // 等于 4.0

              与 C 语言和 Objective-C 不同的是，Swift 默认不允许在数值运算中出现溢出情况。但你可以使用 Swift 的溢出运算符来达到你有目的的溢出（如a &+ b）。详情参见溢出运算符。

              -

              加法运算符也用于String的拼接：

              +

              加法运算符也可用于String的拼接：

              "hello, " + "world"  // 等于 "hello, world"

              两个Character值或一个String和一个Character值，相加会生成一个新的String值：

              diff --git a/chapter2/03_Strings_and_Characters.html b/chapter2/03_Strings_and_Characters.html index a5895fc8..39e2ad0e 100644 --- a/chapter2/03_Strings_and_Characters.html +++ b/chapter2/03_Strings_and_Characters.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
              +
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              @@ -97,12 +102,29 @@
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              • + Questions and Issues +
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              • + Edit and Contribute +
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                +

                翻译：wh1100717
                校对：Hawstein

                diff --git a/chapter2/04_Collection_Types.html b/chapter2/04_Collection_Types.html index 6b1809f1..a80f0650 100644 --- a/chapter2/04_Collection_Types.html +++ b/chapter2/04_Collection_Types.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
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                  翻译：zqp
                  校对：shinyzhu, stanzhai

                  diff --git a/chapter2/05_Control_Flow.html b/chapter2/05_Control_Flow.html index 3bcd2ed7..b4ed0d7e 100644 --- a/chapter2/05_Control_Flow.html +++ b/chapter2/05_Control_Flow.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
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                    翻译：vclwei, coverxit, NicePiao
                    校对：coverxit, stanzhai

                    diff --git a/chapter2/06_Functions.html b/chapter2/06_Functions.html index 3cf6bde0..cde7cbcf 100644 --- a/chapter2/06_Functions.html +++ b/chapter2/06_Functions.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
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                      翻译：honghaoz
                      校对：LunaticM

                      @@ -666,7 +688,7 @@ printWithoutCounting("hello, world")

                      第一个函数 printAndCount，输出一个字符串并返回 Int 类型的字符数。第二个函数 printWithoutCounting调用了第一个函数，但是忽略了它的返回值。当第二个函数被调用时，消息依然会由第一个函数输出，但是返回值不会被用到。

                      -

                      注意：
                      返回值可以被忽略，但定义了有返回值的函数必须返回一个值，如果在函数定义底部没有返回任何值，这叫导致编译错误（compile-time error）。

                      +

                      注意：
                      返回值可以被忽略，但定义了有返回值的函数必须返回一个值，如果在函数定义底部没有返回任何值，这将导致编译错误（compile-time error）。

                      多重返回值函数（Functions with Multiple Return Values）

                      你可以用元组（tuple）类型让多个值作为一个复合值从函数中返回。

                      @@ -692,7 +714,7 @@ printWithoutCounting("hello, world") println("\(total.vowels) vowels and \(total.consonants) consonants") // prints "6 vowels and 13 consonants" -

                      需要注意的是，元组的成员不需要在函数中返回时命名，因为它们的名字已经在函数返回类型有有了定义。

                      +

                      需要注意的是，元组的成员不需要在函数中返回时命名，因为它们的名字已经在函数返回类型中有了定义。

                      函数参数名称（Function Parameter Names）

                      以上所有的函数都给它们的参数定义了参数名（parameter name）：

                      @@ -737,7 +759,7 @@ println("\(total.vowels) vowels and \(total.consonants) consonants")

                      注意：
                      当其他人在第一次读你的代码，函数参数的意图显得不明显时，考虑使用外部参数名。如果函数参数名的意图是很明显的，那就不需要定义外部参数名了。

                      简写外部参数名（Shorthand External Parameter Names）

                      -

                      如果你需要提供外部参数名，但是局部参数名已经定义好了，那么你不需要写两次这些参数名。相反，只写一次参数名，并用井号（#）作为前缀就可以了。这告诉 Swift 使用这个参数名作为局部和外部参数名。

                      +

                      如果你需要提供外部参数名，但是局部参数名已经定义好了，那么你不需要写两次参数名。相反，只写一次参数名，并用井号（#）作为前缀就可以了。这告诉 Swift 使用这个参数名作为局部和外部参数名。

                      下面这个例子定义了一个叫 containsCharacter 的函数，使用井号（#）的方式定义了外部参数名：

                      func containsCharacter(#string: String, #characterToFind: Character) -> Bool {
     for character in string {
@@ -753,9 +775,9 @@ println("\(total.vowels) vowels and \(total.consonants) consonants")
 // containsAVee equals true, because "aardvark" contains a "v”

                      默认参数值（Default Parameter Values）

                      -

                      你可以在函数体中为每个参数定义默认值。当默认值被定义后，调用这个函数时可以略去这个参数。

                      +

                      你可以在函数体中为每个参数定义默认值。当默认值被定义后，调用这个函数时可以忽略这个参数。

                      -

                      注意：
                      将带有默认值的参数放在函数参数表的最后。这样可以保证在函数调用时，非默认参数的顺序是一致的，同时使得相同的函数在不同情况下调用时显得更为清晰。

                      +

                      注意：
                      将带有默认值的参数放在函数参数列表的最后。这样可以保证在函数调用时，非默认参数的顺序是一致的，同时使得相同的函数在不同情况下调用时显得更为清晰。

                      以下是另一个版本的join函数，其中joiner有了默认参数值：

                      func join(string s1: String, toString s2: String, withJoiner joiner: String = " ") -> String {
diff --git a/chapter2/07_Closures.html b/chapter2/07_Closures.html
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                        翻译：wh1100717
                        校对：lyuka
                        
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                          翻译：yankuangshi
                          校对：shinyzhu
                          
diff --git a/chapter2/09_Classes_and_Structures.html b/chapter2/09_Classes_and_Structures.html
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                          类和结构体是人们构建代码所用的一种通用且灵活的构造体。为了在类和结构体中实现各种功能，我们必须要严格按照对于常量，变量以及函数所规定的语法规则来定义属性和添加方法。
                          
+
                          类和结构体是人们构建代码所用的一种通用且灵活的构造体。为了在类和结构体中实现各种功能，我们必须要严格按照常量、变量以及函数所规定的语法规则来定义属性和添加方法。
                          
 
                          与其他编程语言所不同的是，Swift 并不要求你为自定义类和结构去创建独立的接口和实现文件。你所要做的是在一个单一文件中定义一个类或者结构体，系统将会自动生成面向其它代码的外部接口。
                          
 
                          
 
                           注意：
                          通常一个类的实例被称为对象。然而在Swift 中，类和结构体的关系要比在其他语言中更加的密切，本章中所讨论的大部分功能都可以用在类和结构体上。因此，我们会主要使用实例而不是对象。
                          
@@ -596,7 +618,7 @@
 
                          类和结构体对比
                          
 
                          Swift 中类和结构体有很多共同点。共同处在于：
                          
 
                            
-
                          • 定义属性用于储存值
                            • 
+
                          • 定义属性用于存储值
                            • 
 
                          • 定义方法用于提供功能
                            • 
 
                          • 定义附属脚本用于访问值
                            • 
 
                          • 定义构造器用于生成初始化值
                            • 
@@ -639,8 +661,8 @@ class VideoMode {
     var name: String?
 }
                      -

                      在上面的示例中我们定义了一个名为Resolution的结构体，用来描述一个显示器的像素分辨率。这个结构体包含了两个名为width和height的储存属性。储存属性是捆绑和储存在类或结构体中的常量或变量。当这两个属性被初始化为整数0的时候，它们会被推断为Int类型。

                      -

                      在上面的示例中我们还定义了一个名为VideoMode的类，用来描述一个视频显示器的特定模式。这个类包含了四个储存属性变量。第一个是分辨率，它被初始化为一个新的Resolution结构体的实例，具有Resolution的属性类型。新VideoMode实例同时还会初始化其它三个属性，它们分别是，初始值为false(意为“non-interlaced video”)的interlaced，回放帧率初始值为0.0的frameRate和值为可选String的name。name属性会被自动赋予一个默认值nil，意为“没有name值”，因它是一个可选类型。

                      +

                      在上面的示例中我们定义了一个名为Resolution的结构体，用来描述一个显示器的像素分辨率。这个结构体包含了两个名为width和height的存储属性。存储属性是捆绑和存储在类或结构体中的常量或变量。当这两个属性被初始化为整数0的时候，它们会被推断为Int类型。

                      +

                      在上面的示例中我们还定义了一个名为VideoMode的类，用来描述一个视频显示器的特定模式。这个类包含了四个储存属性变量。第一个是分辨率，它被初始化为一个新的Resolution结构体的实例，具有Resolution的属性类型。新VideoMode实例同时还会初始化其它三个属性，它们分别是，初始值为false(意为“non-interlaced video”)的interlaced，回放帧率初始值为0.0的frameRate和值为可选String的name。name属性会被自动赋予一个默认值nil，意为“没有name值”，因为它是一个可选类型。

                      类和结构体实例

                      Resolution结构体和VideoMode类的定义仅描述了什么是Resolution和VideoMode。它们并没有描述一个特定的分辨率（resolution）或者视频模式（video mode）。为了描述一个特定的分辨率或者视频模式，我们需要生成一个它们的实例。

                      生成结构体和类实例的语法非常相似：

                      @@ -649,7 +671,7 @@ let someVideoMode = VideoMode()

                      结构体和类都使用构造器语法来生成新的实例。构造器语法的最简单形式是在结构体或者类的类型名称后跟随一个空括弧，如Resolution()或VideoMode()。通过这种方式所创建的类或者结构体实例，其属性均会被初始化为默认值。构造过程章节会对类和结构体的初始化进行更详细的讨论。

                      属性访问

                      -

                      通过使用点语法（dot syntax）,你可以访问实例中所含有的属性。其语法规则是，实例名后面紧跟属性名，两者通过点号(.)连接：

                      +

                      通过使用点语法（dot syntax），你可以访问实例中所含有的属性。其语法规则是，实例名后面紧跟属性名，两者通过点号(.)连接：

                      println("The width of someResolution is \(someResolution.width)")
 // 输出 "The width of someResolution is 0"
                      @@ -693,7 +715,7 @@ var cinema = hd 
                      println("hd is still \(hd.width    ) pixels wide")
 // 输出 "hd is still 1920 pixels wide"
                      -

                      在将hd赋予给cinema的时候，实际上是将hd中所储存的值（values）进行拷贝，然后将拷贝的数据储存到新的cinema实例中。结果就是两个完全独立的实例碰巧包含有相同的数值。由于两者相互独立，因此将cinema的width修改为2048并不会影响hd中的宽（width）。

                      +

                      在将hd赋予给cinema的时候，实际上是将hd中所存储的值（values）进行拷贝，然后将拷贝的数据存储到新的cinema实例中。结果就是两个完全独立的实例碰巧包含有相同的数值。由于两者相互独立，因此将cinema的width修改为2048并不会影响hd中的宽（width）。

                      枚举也遵循相同的行为准则：

                      enum CompassPoint {
     case North, South, East, West
@@ -709,7 +731,7 @@ if rememberDirection == .West {
 
                      上例中rememberedDirection被赋予了currentDirection的值（value），实际上它被赋予的是值（value）的一个拷贝。赋值过程结束后再修改currentDirection的值并不影响rememberedDirection所储存的原始值（value）的拷贝。
                      
 
                      
 
                      类是引用类型
                      
-
                      与值类型不同，引用类型在被赋予到一个变量，常量或者被传递到一个函数时，操作的并不是其拷贝。因此，引用的是已存在的实例本身而不是其拷贝。
                      
+
                      与值类型不同，引用类型在被赋予到一个变量、常量或者被传递到一个函数时，操作的是引用，其并不是拷贝。因此，引用的是已存在的实例本身而不是其拷贝。
                      
 
                      请看下面这个示例，其使用了之前定义的VideoMode类：
                      
 
                      let tenEighty = VideoMode()
 tenEighty.resolution = hd
@@ -722,14 +744,14 @@ tenEighty.frameRate = 25.0
 
                      let alsoTenEighty = tenEighty
 alsoTenEighty.frameRate = 30.0
 
                      
-
                      因为类是引用类型，所以tenEight和alsoTenEight实际上引用的是相同的VideoMode实例。换句话说，它们只是同一个实例的两种叫法。
                      
+
                      因为类是引用类型，所以tenEight和alsoTenEight实际上引用的是相同的VideoMode实例。换句话说，它们是同一个实例的两种叫法。
                      
 
                      下面，通过查看tenEighty的frameRate属性，我们会发现它正确的显示了基本VideoMode实例的新帧率，其值为30.0：
                      
 
                      println("The frameRate property of tenEighty is now \(tenEighty.frameRate)")
 // 输出 "The frameRate property of theEighty is now 30.0"
 
                      
-
                      需要注意的是tenEighty和alsoTenEighty被声明为常量（（constants）而不是变量。然而你依然可以改变tenEighty.frameRate和alsoTenEighty.frameRate,因为这两个常量本身不会改变。它们并不储存这个VideoMode实例，在后台仅仅是对VideoMode实例的引用。所以，改变的是被引用的基础VideoMode的frameRate参数，而不改变常量的值。
                      
+
                      需要注意的是tenEighty和alsoTenEighty被声明为常量（（constants）而不是变量。然而你依然可以改变tenEighty.frameRate和alsoTenEighty.frameRate,因为这两个常量本身不会改变。它们并不存储这个VideoMode实例，在后台仅仅是对VideoMode实例的引用。所以，改变的是被引用的基础VideoMode的frameRate参数，而不改变常量的值。
                      
 
                      恒等运算符
                      
-
                      因为类是引用类型，有可能有多个常量和变量在后台同时引用某一个类实例。（对于结构体和枚举来说，这并不成立。因为它们作值类型，在被赋予到常量，变量或者传递到函数时，总是会被拷贝。）
                      
+
                      因为类是引用类型，有可能有多个常量和变量在后台同时引用某一个类实例。（对于结构体和枚举来说，这并不成立。因为它们作为值类型，在被赋予到常量、变量或者传递到函数时，其值总是会被拷贝。）
                      
 
                      如果能够判定两个常量或者变量是否引用同一个类实例将会很有帮助。为了达到这个目的，Swift 内建了两个恒等运算符：
                      
 
                        
 
                      • 等价于 （ === ）
                        • 
@@ -741,7 +763,7 @@ alsoTenEighty.frameRate = 30.0
 }
 //输出 "tenEighty and alsoTenEighty refer to the same Resolution instance."
 
                      
-
                      请注意“等价于”（用三个等号表示，===） 与“等于”（用两个等号表示，==）的不同：
                      
+
                      请注意“等价于"（用三个等号表示，===） 与“等于"（用两个等号表示，==）的不同：
                      
 
                        
 
                      • “等价于”表示两个类类型（class type）的常量或者变量引用同一个类实例。
                        • 
 
                      • “等于”表示两个实例的值“相等”或“相同”，判定时要遵照类设计者定义定义的评判标准，因此相比于“相等”，这是一种更加合适的叫法。
                        • 
@@ -752,7 +774,7 @@ alsoTenEighty.frameRate = 30.0
 
                        
 
                        类和结构体的选择
                        
 
                        在你的代码中，你可以使用类和结构体来定义你的自定义数据类型。
                        
-
                        然而，结构体实例总是通过值传递，类实例总是通过引用传递。这意味两者适用不同的任务。当你的在考虑一个工程项目的数据构造和功能的时候，你需要决定每个数据构造是定义成类还是结构体。
                        
+
                        然而，结构体实例总是通过值传递，类实例总是通过引用传递。这意味两者适用不同的任务。当你在考虑一个工程项目的数据构造和功能的时候，你需要决定每个数据构造是定义成类还是结构体。
                        
 
                        按照通用的准则，当符合一条或多条以下条件时，请考虑构建结构体：
                        
 
                          
 
                        • 结构体的主要目的是用来封装少量相关简单数据值。
                          • 
@@ -861,12 +883,12 @@ println(c[0])
 // 输出 "These two subarrays share the same elements."

                      强制复制数组

                      -

                      我们通过调用数组的copy方法进行强制显性复制。这个方法对数组进行了浅拷贝（shallow copy）,并且返回一个包含此拷贝的新数组。

                      +

                      我们通过调用数组的copy方法进行强制显式复制。这个方法对数组进行了浅拷贝（shallow copy），并且返回一个包含此拷贝数组的新数组。

                      下面这个示例中定义了一个names数组，其包含了七个人名。还定义了一个copiedNames变量，用以储存在names上调用copy方法所返回的结果：

                      var names = ["Mohsen", "Hilary", "Justyn", "Amy", "Rich", "Graham", "Vic"]
 var copiedNames = names.copy()
                      -

                      我们可以通过修改一个数组中某元素，并且检查另一个数组中对应元素的方法来判定names数组确已被复制。如果你将copiedNames中第一个元素从"Mohsen"修改为"Mo",则names数组返回的仍是拷贝发生前的"Mohsen"：

                      +

                      我们可以通过修改数组中某一个元素，并且检查另一个数组中对应元素的方法来判定names数组确已被复制。如果你将copiedNames中第一个元素从"Mohsen"修改为"Mo",则names数组返回的仍是拷贝发生前的"Mohsen"：

                      copiedName[0] = "Mo"
 println(name[0])
 // 输出 "Mohsen"
diff --git a/chapter2/10_Properties.html b/chapter2/10_Properties.html
index 6290f7b9..005bd60f 100644
--- a/chapter2/10_Properties.html
+++ b/chapter2/10_Properties.html
@@ -16,6 +16,8 @@
         
     
     
+    
+    
     
     
     
@@ -32,12 +34,12 @@
 
 
         
-    
                      
+    
                      
     
                      
     
     
     
-    
+    
     
     
     
@@ -80,6 +82,9 @@
     
 
     
+    
+    
+    
 
     
     
                      
@@ -97,12 +102,29 @@

                      如果严格地从左计算到右，计算过程会是这样：

                        -
                      • 2 plus 3 equals 5;
                      • 2 + 3 = 5
                        • -
                      • 5 times 4 equals 20;
                      • 5 * 4 = 20
                        • -
                      • 20 remainder 5 equals 0
                      • 20 / 5 = 4 余 0

                      但是正确答案是4而不是0。优先级高的运算符要先计算，在Swift和C语言中，都是先乘除后加减的。所以，执行完乘法和求余运算才能执行加减运算。

                      乘法和求余拥有相同的优先级，在运算过程中，我们还需要结合性，乘法和求余运算都是左结合的。这相当于在表达式中有隐藏的括号让运算从左开始。

                      2 + ((3 * 4) % 5)
                      -

                      (3 4) is 12, so this is equivalent to: -3 4 = 12，所以这相当于：

                      +

                      3 * 4 = 12，所以这相当于：

                      2 + (12 % 5)
                      -

                      (12 % 5) is 2, so this is equivalent to: -12 % 5 = 2，所这又相当于

                      +

                      12 % 5 = 2，所这又相当于

                      2 + 2

                      计算结果为 4。

                      diff --git a/chapter2/chapter2.html b/chapter2/chapter2.html index bd69a12b..9223e85e 100644 --- a/chapter2/chapter2.html +++ b/chapter2/chapter2.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
                      +
                      - + @@ -80,6 +82,9 @@ + + +

                      @@ -97,12 +102,29 @@
                        - + +
                      • + About the author +
                        • + +
                      • + Questions and Issues +
                        • + + +
                      • + Edit and Contribute +
                        • + + + +
                      • +
                      • 序 @@ -573,7 +595,7 @@
                        -
                        +

                        Swift 教程

                        本章介绍了 Swift 的各种特性及其使用方法，是全书的核心部分。

                        diff --git a/chapter3/01_About_the_Language_Reference.html b/chapter3/01_About_the_Language_Reference.html index 874d970a..81536c1a 100644 --- a/chapter3/01_About_the_Language_Reference.html +++ b/chapter3/01_About_the_Language_Reference.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
                        +
                        - + @@ -80,6 +82,9 @@ + + +

                        @@ -97,12 +102,29 @@
                          - + +
                        • + About the author +
                          • + +
                        • + Questions and Issues +
                          • + + +
                        • + Edit and Contribute +
                          • + + + +
                        • +
                        • 序 @@ -573,7 +595,7 @@
                          -
                          +

                          翻译：dabing1022
                          校对：numbbbbb

                          diff --git a/chapter3/02_Lexical_Structure.html b/chapter3/02_Lexical_Structure.html index 7e146bdd..9d7d66af 100644 --- a/chapter3/02_Lexical_Structure.html +++ b/chapter3/02_Lexical_Structure.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
                          +
                          - + @@ -80,6 +82,9 @@ + + +

                          @@ -97,12 +102,29 @@
                            - + +
                          • + About the author +
                            • + +
                          • + Questions and Issues +
                            • + + +
                          • + Edit and Contribute +
                            • + + + +
                          • +
                          • 序 @@ -573,7 +595,7 @@
                            -
                            +

                            翻译：superkam
                            校对：numbbbbb

                            diff --git a/chapter3/03_Types.html b/chapter3/03_Types.html index d9fc21b9..e2e09e4f 100644 --- a/chapter3/03_Types.html +++ b/chapter3/03_Types.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
                            +
                            - + @@ -80,6 +82,9 @@ + + +

                            @@ -97,12 +102,29 @@
                              - + +
                            • + About the author +
                              • + +
                            • + Questions and Issues +
                              • + + +
                            • + Edit and Contribute +
                              • + + + +
                            • +
                            • 序 @@ -573,7 +595,7 @@
                              -
                              +

                              翻译：lyuka
                              校对：numbbbbb, stanzhai

                              diff --git a/chapter3/04_Expressions.html b/chapter3/04_Expressions.html index 4500b0d6..3dec8980 100644 --- a/chapter3/04_Expressions.html +++ b/chapter3/04_Expressions.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
                              +
                              - + @@ -80,6 +82,9 @@ + + +

                              @@ -97,12 +102,29 @@
                                - + +
                              • + About the author +
                                • + +
                              • + Questions and Issues +
                                • + + +
                              • + Edit and Contribute +
                                • + + + +
                              • +
                              • 序 @@ -573,7 +595,7 @@
                                -
                                +

                                翻译：sg552
                                校对：numbbbbb, stanzhai

                                diff --git a/chapter3/05_Declarations.html b/chapter3/05_Declarations.html index dd775708..811246d2 100644 --- a/chapter3/05_Declarations.html +++ b/chapter3/05_Declarations.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
                                +
                                - + @@ -80,6 +82,9 @@ + + +

                                @@ -97,12 +102,29 @@
                                  - + +
                                • + About the author +
                                  • + +
                                • + Questions and Issues +
                                  • + + +
                                • + Edit and Contribute +
                                  • + + + +
                                • +
                                • 序 @@ -573,7 +595,7 @@
                                  -
                                  +

                                  翻译：marsprince
                                  校对：numbbbbb, stanzhai

                                  diff --git a/chapter3/06_Attributes.html b/chapter3/06_Attributes.html index 6e0c0f75..a8dbbaa9 100644 --- a/chapter3/06_Attributes.html +++ b/chapter3/06_Attributes.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
                                  +
                                  - + @@ -80,6 +82,9 @@ + + +

                                  @@ -97,12 +102,29 @@
                                    - + +
                                  • + About the author +
                                    • + +
                                  • + Questions and Issues +
                                    • + + +
                                  • + Edit and Contribute +
                                    • + + + +
                                  • +
                                  • 序 @@ -573,7 +595,7 @@
                                    -
                                    +

                                    翻译：Hawstein
                                    校对：numbbbbb, stanzhai

                                    diff --git a/chapter3/07_Patterns.html b/chapter3/07_Patterns.html index 68ce5c4b..7880d597 100644 --- a/chapter3/07_Patterns.html +++ b/chapter3/07_Patterns.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
                                    +
                                    - + @@ -80,6 +82,9 @@ + + +

                                    @@ -97,12 +102,29 @@
                                      - + +
                                    • + About the author +
                                      • + +
                                    • + Questions and Issues +
                                      • + + +
                                    • + Edit and Contribute +
                                      • + + + +
                                    • +
                                    • 序 @@ -573,7 +595,7 @@
                                      -
                                      +

                                      翻译：honghaoz
                                      校对：numbbbbb, stanzhai

                                      diff --git a/chapter3/08_Generic_Parameters_and_Arguments.html b/chapter3/08_Generic_Parameters_and_Arguments.html index 279c578a..e6de9095 100644 --- a/chapter3/08_Generic_Parameters_and_Arguments.html +++ b/chapter3/08_Generic_Parameters_and_Arguments.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
                                      +
                                      - + @@ -80,6 +82,9 @@ + + +

                                      @@ -97,12 +102,29 @@
                                        - + +
                                      • + About the author +
                                        • + +
                                      • + Questions and Issues +
                                        • + + +
                                      • + Edit and Contribute +
                                        • + + + +
                                      • +
                                      • 序 @@ -573,7 +595,7 @@
                                        -
                                        +

                                        翻译：fd5788
                                        校对：yankuangshi, stanzhai

                                        diff --git a/chapter3/09_Summary_of_the_Grammar.html b/chapter3/09_Summary_of_the_Grammar.html index 5e30027c..8abdd484 100644 --- a/chapter3/09_Summary_of_the_Grammar.html +++ b/chapter3/09_Summary_of_the_Grammar.html @@ -16,6 +16,8 @@ + + @@ -30,12 +32,12 @@ -
                                        +
                                        - + @@ -78,6 +80,9 @@ + + +

                                        @@ -95,12 +100,29 @@
                                          - + +
                                        • + About the author +
                                          • + +
                                        • + Questions and Issues +
                                          • + + +
                                        • + Edit and Contribute +
                                          • + + + +
                                        • +
                                        • 序 @@ -571,7 +593,7 @@
                                          -
                                          +

                                          翻译：stanzhai
                                          校对：xielingwang

                                          diff --git a/chapter3/10_Statements.html b/chapter3/10_Statements.html index e2d992c5..69378dce 100644 --- a/chapter3/10_Statements.html +++ b/chapter3/10_Statements.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
                                          +
                                          - + @@ -80,6 +82,9 @@ + + +

                                          @@ -97,12 +102,29 @@
                                            - + +
                                          • + About the author +
                                            • + +
                                          • + Questions and Issues +
                                            • + + +
                                          • + Edit and Contribute +
                                            • + + + +
                                          • +
                                          • 序 @@ -573,7 +595,7 @@
                                            -
                                            +

                                            翻译：coverxit
                                            校对：numbbbbb, coverxit, stanzhai

                                            diff --git a/chapter3/chapter3.html b/chapter3/chapter3.html index 6d40514d..2f6dd8cf 100644 --- a/chapter3/chapter3.html +++ b/chapter3/chapter3.html @@ -16,6 +16,8 @@ + + @@ -32,12 +34,12 @@ -
                                            +
                                            - + @@ -80,6 +82,9 @@ + + +

                                            @@ -97,12 +102,29 @@
                                              - + +
                                            • + About the author +
                                              • + +
                                            • + Questions and Issues +
                                              • + + +
                                            • + Edit and Contribute +
                                              • + + + +
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                                              - + @@ -78,6 +80,9 @@ + + +

                                              @@ -95,12 +100,29 @@
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                                              • + About the author +
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                                              • 序 @@ -571,7 +593,7 @@
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                                                Swift 兴趣交流群：305014012，307017261（已满） diff --git a/manifest.appcache b/manifest.appcache index 609c8186..b23672ea 100644 --- a/manifest.appcache +++ b/manifest.appcache @@ -1,5 +1,5 @@ CACHE MANIFEST -# Revision 1402903834499 +# Revision 1402929590292 CACHE: index.html @@ -10,13 +10,13 @@ chapter2/13_Inheritance.html chapter2/01_The_Basics.html chapter2/03_Strings_and_Characters.html chapter2/04_Collection_Types.html -chapter2/06_Functions.html chapter2/05_Control_Flow.html +chapter2/06_Functions.html chapter2/07_Closures.html chapter2/08_Enumerations.html chapter2/09_Classes_and_Structures.html -chapter2/11_Methods.html chapter2/10_Properties.html +chapter2/11_Methods.html chapter2/12_Subscripts.html chapter2/02_Basic_Operators.html chapter2/14_Initialization.html @@ -34,12 +34,12 @@ chapter3/06_Attributes.html chapter3/01_About_the_Language_Reference.html chapter3/03_Types.html chapter3/04_Expressions.html -chapter3/05_Declarations.html chapter3/02_Lexical_Structure.html chapter3/07_Patterns.html +chapter3/05_Declarations.html chapter3/08_Generic_Parameters_and_Arguments.html -chapter3/10_Statements.html chapter3/09_Summary_of_the_Grammar.html +chapter3/10_Statements.html chapter3/chapter3.html gitbook/app.js gitbook/fonts/fontawesome/FontAwesome.otf diff --git a/search_index.json b/search_index.json index a4155226..f25ecd35 100644 --- a/search_index.json +++ b/search_index.json @@ -1 +1 @@ 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expression.init（initi","expression.memb","expression.self","expression[index","expressions）sort","expressions）二元表达式（binari","expressions）函数调用表达式（funct","expressions）前缀表达式（prefix","expressions）字符型表达式（liter","expressions）赋值表达式（assign","expression）dynamic表达式（dynam","expression）self表达式（self","expression）。通常会增加或减少计数器的值，或者根据语句（stat","expression）下标脚本表达式（subscript","expression）初始化函数表达式（initi","expression）可选链表达式（optional-chain","expression）后缀self表达式（postfix","expression）后缀表达式（postfix","expression）圆括号表达式（parenthes","expression）强制取值表达式（forced-valu","expression）显式成员表达式（explicit","expression）被调用，如果表达式调用结果为false，循环结束，继续执行for","expression）超类表达式（superclass","expression）通配符表达式（wildcard","expression）闭包表达式（closur","expression）隐式成员表达式（implicit","expression），switch","exp，那这个数相当于基数和10^exp","exp，那这个数相当于基数和2^exp","extens","extension-bodi","extensions）扩展语法（extens","extern","f","f()和f(x:7)都是只有一个变量x的函数的有效调用，但是f(7","f(7","f(x","f.temperatur","face字符的utf-16","face的4","face的unicod","face，unicod","fahrenheit","fahrenheit时为属性temperatur","fahrenheit，它拥有一个double类型的存储型属性temperatur","fail","failur","fall","fallthrough","fallthrough关键字。下面的例子使用fallthrough","fallthrough语句。关于fallthrough","fallthrough语句可出现在switch","fallthrough语句用于在switch语句中传递控制权。fallthrough语句会把控制权从switch","fallthrough语句，详情请参考贯穿（fallthrough","fallthrough）区间匹配（rang","fals","false。同样的，item","false，但是我们是知道紧急情况下重置的密码的，所以整个复杂表达式的值还是tru","false，整个表达式的值就为false。事实上，如果第一个值为fals","fd5788","feed","feed）\\n","feed）（u+000a）、回车符（carriag","feed）（u+000c）以及空（null）（u+0000","feet","few","fibonacci","filenam","file），它返回的是当前modul","final","finalsquar","finalsquare、board、square和dicerol","finalsquare）和while方式相同，但是只会在循环结束后进行计算。在这个游戏中，do-while表现得比while循环更好。do-while方式会在条件判断square没有超出后直接运行squar","finalsquare，这表明你必须刚好落在方格25","final来防止它们被重写，只需要在声明关键字前加上@final特性即可。（例如：@fin","findindex([\"mik","findindex([3.14159","findindex(arrai","findindex中这个单个类型参数写做：t","findindex函数现在则可以成功的编译过，并且作用于任何遵循equatable的类型，如double或str","findindex，用某个类型t","findstringindex","findstringindex(arrai","findstringindex(str","findstringindex的泛型版本findindex。请注意这个函数仍然返回int","findstringindex的非泛型函数，该函数功能是去查找包含一给定string值的数组。若查找到匹配的字符串，findstringindex函数返回该字符串在数组中的索引值（int），反之则返回nil","first","first-class）类型。它们采用了很多传统上只被类（class)所支持的特征，例如计算型属性（comput","firstbit","firstbits和otherbits都有一个1跟另一个数不同的。所以按位异或的结果是把它这些位置为1，其他都置为0","firstforloop","firstitem","firstnumb","firstnumber是一个值为10的常量，secnodename是一个值为42","firstprotocol","firstroomnam","firstsixbit","firstsixbits和lastsixbits中间4个位都为1。对它俩进行按位与运算后，就得到了00111100，即十进制的60","firstvalu","firstvector","five","fiveeight","fiveonezero","fixedincr","fixedlengthrang","fixedlengthrange(firstvalu","fixedlengthrange的实例包含一个名为firstvalue的变量存储属性和一个名为length的常量存储属性。在上面的例子中，length","fixedpoint","fixedpoint.movebyx(2.0","flat","float","floating-point","float并指定初始值为4","float表示32","flour","flow","flow）中介绍，当考虑一个枚举的成员们时，一个switch语句必须全面。如果忽略了.west这种情况，上面那段代码将无法通过编译，因为它没有考虑到compasspoint","follow","food","food(nam","food、recipeingredient以及shoppinglistitem","food的子类recipeingredient。recipeingredient类构建了食谱中的一味调味剂。它引入了int类型的数量属性quantity（以及从food继承过来的name属性），并且定义了两个构造器来创建recipeingredi","food类中的构造器init(nam","food类提供了一个接受单一参数name的指定构造器。这个构造器可以使用一个特定的名字来创建新的food","food，它是一个简单的用来封装食物名字的类。food类引入了一个叫做name的string类型属性，并且提供了两个构造器来创建food","for-condition-increment）循环，swift","for-in","for-infor条件递增（for-condition-increment）whil","for-in循环和半闭区间操作（..）来迭代somecontainer中的所有元素。对于每个元素，函数检查是否somecontainer中的元素不等于对应的anothercontainer中的元素，如果这两个元素不等，则这两个容器不匹配，返回fals","for-in循环来遍历字符串中的字符（charact","for-in循环来遍历某个字典中的键值对。每一个字典中的数据项都由(kei","for-in循环的介绍请参见for","for-in循环请参见for","for-in循环，swift","for-in循环，用来更简单地遍历数组（array），字典（dictionary），区间（range），字符串（str","for-in用来遍历一个区间（range），序列（sequence），集合（collection），系列（progress","for-in语句允许在重复执行代码块的同时，迭代集合（或遵循sequ","for-in语句或者变量或常量申明时，它可以包含通配符模式，标识符模式或者其他包含这两种模式的模式。例如，下面这段代码是不正确的，因为(x","forc","force-unwrap","forced-valu","forget","forkei","fork，超过30人参与翻译和校对工作，项目最高排名github总榜第4","form","for和while循环，基于特定条件选择执行不同代码分支的if和switch语句，还有控制流程跳转到其他代码的break和continu","for循环用来按照指定的次数多次执行一系列语句。swift","for条件递增（for-condition-incr","for条件递增（for-condition-increment）循环体中，在调用continu","for语句、for-in语句、while语句和do-whil","for语句中，continue语句执行后，incr","for语句的作用域以内有效。condit","found","found"","found")元组把一个int值和一个str","foundat","foundindex","four","fourbyfivebytwo","fourbyfivebytwo.volum","framer","freezingpointofwat","freezingpointofwater.temperatureincelsiu","friar","friendlywelcom","friendlywelcome的值从"hello!"改为了"bonjour!"","fromfahrenheit，内部名字为fahrenheit；第二个构造器也拥有一个构造参数，其外部名字为fromkelvin，内部名字为kelvin。这两个构造器都将唯一的参数值转换成摄氏温度值，并保存在属性temperatureincelsiu","fromraw方法来试图找到具有特定原始值的枚举成员。这个例子通过原始值7识别uranu","fromthetop","fruit","fruitsummari","ft","fullnam","fullynam","fullynamed协议含有fullname属性。因此其遵循者必须含有一个名为fullname，类型为str","func","function","functions）函数参数与返回值（funct","functions）函数的定义与调用（defin","functions）尾随闭包（trail","functions），它们定义在全局域中。你也可以把函数定义在别的函数体中，称作嵌套函数（nest","function）中，__function__","function）的类型相当于一个嵌套函数类型。例如，下面的柯里化函数addtwonumber()()的类型是int","function）闭包表达式语法（closur","func关键字之前加上关键字class；声明结构体和枚举的类型方法，在方法的func关键字之前加上关键字stat","func来声明一个函数，使用名字和参数来调用函数。使用->","g","game","game(gam","game,d12,simothehamst","game.deleg","game.dice.sides)-sid","game.plai","gamedidend(gam","gamedidstart(gam","gamedidstart方法从game参数获取游戏信息并输出。game在方法中被当做dicegame类型而不是snakeandladders类型，所以方法中只能访问dicegam","gameloop","gameloop去跳转到下一次循环迭代时，这里使用gameloop标签并不是严格必须的。因为在这个游戏中，只有一个循环体，所以continue语句会影响到哪个循环体是没有歧义的。然而，continue语句使用gameloop标签也是没有危害的。这样做符合标签的使用规则，同时参照旁边的break","gameloop语句结束本次whil","gameloop语句跳转控制去执行whil","gear","geek5nan","gener","generate方法来获取一个生成器类型（这是一个遵循gener","generator.random","getgaspric","gettable，但它不要求属性是存储型属性(stor","getter","getter-claus","getter-sett","getter-setter-block","getter-setter关键字(keyword","getter-setter方法​​块可以由一个getter子句后跟一个可选的setter子句构成，用大括号括起来，或者由一个setter子句后跟一个gett","getter/sett","getters和sett","getters和setters。（译者注：getters和sett","getter关键字(keyword","getter和sett","getter和setter。如果下标脚本申明包含get和set","getter和setter要求。结果就是你不需要在协议里它被声明的地方实现getter和sett","getter和setter要求可以通过一致性类型以各种方式满足。如果属性声明包含get和set关键词，一致性类型就可以用可读写（实现了getter和setter）的存储型变量属性或计算型属性，但是属性不能以常量属性或只读计算型属性实现。如果属性声明仅仅包含get","getter和setter语句。如果下标脚本声明值包含get","getter用于读取值，setter用于写入值。setter子句是可选的，当仅需要一个getter子句时，可以将二者都忽略且直接返回请求的值即可。也就是说，如果使用了setter子句，就必须使用gett","getter用来读取变量值，setter用来写入变量值。setter子句是可选择的，只有gett","getter获取某个值，或者通过sett","getter语句，可以选择是否包含sett","get代码块中的代码写在subscript","get关键字表示。它们的返回值是double型，而且可以用于所有接受doubl","get部分返回值是int?，上例中的numberoflegs字典通过附属脚本返回的是一个int?或者说“可选的int”，不是每个字典的索引都能得到一个整型值，对于没有设过值的索引的访问返回的结果就是nil；同样想要从字典实例中删除某个索引下的值也只需要给这个索引赋值为nil","ghostbust","give","given","global","goe","gonna","good","goodby","graham","grammar","great","green","greencompon","greet","greet(\"bob","greet(nam","grid","grid[(row","grtmndsthnklk","gt","gt;>","gt;"","gt;！&","guard","guard-claus","guard-express","h","half-clos","halfopenrangelength(start","hall","hamster","hamster(nam","hamster的实例可以作为textrepresent","haolloyin","happi","happym","harmless","hasanymatches(list","hasanymatches(numb","hasarea","hasarea协议时，通过as?操作符将其可选绑定(opt","hasdoorkei","hasdoorkey）为false，但第二个值（knowsoverridepassword）为true，所以整个表达是tru","hashabl","hashable和valuetype产生的。每一个类型实参必须满足它所替代的泛型形参的所有约束，包括任何where子句所指定的额外的要求。上面的例子中，类型形参keytype要求满足hashable协议，因此string也必须满足hash","hashead","hasprefix","hasprefix/hassuffix","hassuffix","hawk","hawstein","hd","hd.width","hd实例中width属性还是1920","hd的常量，其值为一个初始化为全高清视频分辨率（1920","hd赋予给cinema的时候，实际上是将hd中所存储的值（values）进行拷贝，然后将拷贝的数据存储到新的cinema实例中。结果就是两个完全独立的实例碰巧包含有相同的数值。由于两者相互独立，因此将cinema的width修改为2048并不会影响hd中的宽（width","head","heart","hearts.simpledescript","heartsdescript","heartssymbol","hearts成员：给hearts常量赋值时，枚举成员suit.hearts需要用全名来引用，因为常量没有显式指定类型。在switch里，枚举成员使用缩写.hearts来引用，因为self的值已经知道是一个suit","heathrow","height","height=\"120","height=\"169","height=\"357","height=\"387","heigth","hello","hello-world","help","here","here'","hexadecim","hexadecimaldoubl","hexadecimalinteg","high","highest","highestunlockedlevel","highland","hilari","honghaoz","horizont","horribl","hors","href=\"https://github.com/tairraos/the-swift-programming-language-in-chinese/blob/gh-pages/chapter1/guidedtour.playground.zip?raw=true\">打开playgroundhello","pad","paddeddoubl","paddedstr","paint","pair","pairs）。遍历字典时，字典的每项元素会以(kei","paragraph","paragraph变量为nil，打破它持有的htmlelement实例的强引用，htmlel","paragraph变量定义为可选htmlelement，因此我们可以赋值nil","parakeet","paramet","parameter)，不支持默认参数(default","parameter-claus","parameternam","parameters"","parameters)或返回类型(return","parameters)指定一个或多个用于在相关类型的下标脚本中访问元素的索引（例如，表达式object[i]中的i）。尽管用于元素访问的索引可以是任意类型的，但是每个变量必须包含一个用于指定每种索引类型的类型标注。返回类型(return","parameters）函数类型（funct","parameters）常量参数和变量参数（const","parameters）无参函数（funct","parameters）无返回值函数（funct","parameters）输入输出参数（in-out","parent","parenthes","passedretinascan","passeng","pattern","pattern-matched)的，和其相反的是switch语句case块中枚举事件匹配，在枚举事件类型(enumer","patterns）表达式模式（express","patterns）通配符模式（wildcard","pattern）代表了单个值或者复合值的结构。例如，元组(1","pattern）值绑定模式（value-bind","pattern）元组模式（tupl","pattern）和元组模式（tupl","pattern）枚举用例模式（enumer","pattern）标识符模式（identifi","pattern）类型转换模式（type-cast","pattern），标识符模式（identifi","peiyucn","penguin","pepper","performact","perimet","person","person'","person(fullnam","person(nam","person?的变量，用来按照代码片段中的顺序，为新的person实例建立多个引用。由于这些变量是被定义为可选类型（person?，而不是person），它们的值会被自动初始化为nil，目前还不会引用到person","personnam","person和apart","person和apartment实例并将类实例赋值给john和number73","person和apartment的例子一致，但是有一个重要的区别。这一次，apartment的ten","person和apartment的例子展示了两个属性的值都允许为nil","person和resid","person和residence模型通过添加一个room和一个address","person实例依然保持对apartment实例的强引用，但是apartment实例只是对person实例的弱引用。这意味着当你断开john变量所保持的强引用时，再也没有指向person","person实例有一个类型为string，名字为name的属性，并有一个可选的初始化为nil的apartment属性。apart","person实例现在有了一个指向apartment实例的强引用，而apartment实例也有了一个指向person实例的强引用。因此，当你断开john和number73","person实例的引用数量，并且会在person","person实例，它的resid","person实例，这也意味着你不再使用这个person","person类开始，并定义了一个叫nam","person类有一个构造函数，此构造函数为实例的name属性赋值并打印出信息，以表明初始化过程生效。person","person类的新实例被赋值给了reference1变量，所以reference1到person类的新实例之间建立了一个强引用。正是因为这个强引用，arc"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