correct an mistake

This commit is contained in:
numbbbbb
2014-06-09 23:40:45 +08:00
parent 6ccb4be376
commit 19c52d124b
42 changed files with 78 additions and 78 deletions

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<div class="book" data-level="2.1" data-basepath=".." data-revision="1402323563628">
<div class="book" data-level="2.1" data-basepath=".." data-revision="1402323960213">
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<div class="page-inner">
<section class="normal" id="section-gitbook_289">
<section class="normal" id="section-gitbook_348">
<h1 id="-">基础部分</h1>
<p>Swift 是 iOS 和 OS X 应用开发的一门新语言。然而,如果你有 C 或者 Objective-C 开发经验的话,你会发现 Swift 的很多内容都是你熟悉的。</p>

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<div class="page-inner">
<section class="normal" id="section-gitbook_311">
<section class="normal" id="section-gitbook_370">
<h1 id="-">基础运算符</h1>
<p>运算符是检查, 改变, 合并值的特殊符号或短语. 例如, 加号 <code>+</code> 把计算两个数的和(如 <code>let i = 1 + 2</code>). 复杂些的运行算包括逻辑与<code>&amp;&amp;</code>(如 <code>if enteredDoorCode &amp;&amp; passedRetinaScan</code>), 还有自增运算符 <code>++i</code> 这样让自身加一的便捷运算.</p>

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<div class="book" data-level="2.3" data-basepath=".." data-revision="1402323563628">
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<div class="page-inner">
<section class="normal" id="section-gitbook_290">
<section class="normal" id="section-gitbook_349">
<h1 id="-strings-and-characters-">字符串和字符 (Strings and Characters)</h1>
<p>本页包含内容:</p>

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<div class="page-inner">
<section class="normal" id="section-gitbook_302">
<section class="normal" id="section-gitbook_361">
<h1 id="-collection-types-">集合类型 (Collection Types)</h1>

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<div class="page-inner">
<section class="normal" id="section-gitbook_303">
<section class="normal" id="section-gitbook_362">
<h1 id="-">控制流</h1>
<p>Swift提供了类似C语言的流程控制结构包括将任务执行多次的<code>for</code><code>while</code>循环,基于特定条件选择执行不同分支的<code>if</code><code>switch</code>语句,还有控制流程跳转到其他代码的<code>break</code><code>continue</code>语句。</p>

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<div class="page-inner">
<section class="normal" id="section-gitbook_304">
<section class="normal" id="section-gitbook_364">
<h1 id="-functions-">函数Functions</h1>
<p>本页包含内容:</p>
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</blockquote>
<h3 id="-in-out-parameters-">输入输出参数In-Out Parameters</h3>
<p>变量参数正如上面所述仅仅能在函数体内被更改。如果你想要一个函数可以修改参数的值并且想要在这些修改在函数调用结束后仍然存在那么就应该把这个参数定义为输入输出参数In-Out Parameters</p>
<p>定义一个输入输出参数时,在参数定前加<code>inout</code>关键字。一个输入输出参数有传入函数的值,这个值被函数修改,然后被传出函数,替换原来的值。</p>
<p>定义一个输入输出参数时,在参数定前加<code>inout</code>关键字。一个输入输出参数有传入函数的值,这个值被函数修改,然后被传出函数,替换原来的值。</p>
<p>你只能传入一个变量作为输入输出参数。你不能传入常量或者字面量literal value因为这些量是不能被修改的。当传入的参数作为输入输出参数时需要在参数前加<code>&amp;</code>符,表示这个值可以被函数修改。</p>
<blockquote>
<p>注意:

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<div class="page-inner">
<section class="normal" id="section-gitbook_305">
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<h1 id="-">闭包</h1>
<p>本页内容包含:</p>

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<div class="page-inner">
<section class="normal" id="section-gitbook_306">
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<h1 id="-">枚举</h1>
<p>本页内容包含:</p>

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<div class="page-inner">
<section class="normal" id="section-gitbook_307">
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<h3 id="-">类和结构体</h3>
<p>本页包含内容:</p>

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<section class="normal" id="section-gitbook_308">
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<h1 id="-properties-">属性 (Properties)</h1>
<p><strong>属性</strong>将值跟特定的类、结构或枚举关联。一种是存储属性,把常量或变量的值作为实例的一部分,一种是计算属性,它计算一个值。计算属性可以用于类、结构和枚举里,存储属性只能用于类和结构。</p>

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<div class="page-inner">
<section class="normal" id="section-gitbook_309">
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<h1 id="-methods-">方法(Methods)</h1>
<p><strong>方法</strong>是与某些特定类型相关联的功能/函数。类、结构体、枚举都可以定义实例方法;实例方法为指定类型的实例封装了特定的任务与功能。类、结构体、枚举也可以定义类(型)方法(type itself)类型方法与类型自身相关联。类型方法与Objective-C中的类方法(class methods)相似。</p>

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<section class="normal" id="section-gitbook_310">
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<h1 id="-subscripts-">下标 (Subscripts)</h1>
<p>下标可以定义在类(Class)、结构体(structures)和枚举(enumerations)这些目标中,可以认为是访问对象、集合或序列的快捷方式。举例来说,用下标访问一个数组(Array)实例中的元素可以这样写 <code>someArray[index]</code> ,访问字典(Dictionary)实例中的元素可以这样写 <code>someDictionary[key]</code>,而不需要再调用实例的某个方法来获得元素的值。</p>

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<section class="normal" id="section-gitbook_288">
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<h1 id="-">继承</h1>
<p>一个类可以继承另一个类的方法属性和其它特性。当一个类继承其它类继承类叫子类被继承类叫超类或父类。在Swift中继承是区分「类」与其它类型的一个基本特征。</p>

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<div class="book" data-level="2.14" data-basepath=".." data-revision="1402323563628">
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<section class="normal" id="section-gitbook_313">
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<h1 id="-">析构过程</h1>
<p>在一个类的实例被释放之前析构函数被立即调用。用关键字deinit来标示析构函数类似于初始化函数用init来标示。析构函数只适用于类类型。</p>

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<section class="normal" id="section-gitbook_314">
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<h1 id="-">自动引用计数</h1>
<p>本页包含内容:</p>

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<section class="normal" id="section-gitbook_315">
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<h1 id="optional-chaining">Optional Chaining</h1>
<p>可选链Optional Chaining是一种可以请求和调用属性、方法及子脚本的过程它的自判断性体现于请求或调用的目标当前可能为空<code>nil</code>)。如果自判断的目标有值,那么调用就会成功;相反,如果选择的目标为空(<code>nil</code>),则这种调用将返回空(<code>nil</code>)。多次请求或调用可以被链接在一起形成一个链,如果任何一个节点为空(<code>nil</code>)将导致整个链失效。</p>

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<section class="normal" id="section-gitbook_316">
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<h1 id="-type-casting-">类型检查Type Casting</h1>
<p>ps为了方便各位检验所以保留了英文可删。

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<section class="normal" id="section-gitbook_317">
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<h1 id="-">类型嵌套</h1>
<p>本页包含内容:</p>

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<h1 id="-extensions-">扩展Extensions</h1>
<hr>

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<section class="normal" id="section-gitbook_318">
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<h1 id="-">协议</h1>
<p><code>Protocol(协议)</code>定义了用于完成某项任务或功能的方法,属性等,它不具备任何功能的细节实现,只用来<strong>统一</strong>方法,属性等的名称和其类型.(<em>译者注: 其他语言中也把 <code>Portocol</code> 称为 <code>Interface(接口)</code></em> ).协议可以被<code>类,枚举,结构体</code>采纳并实现,任意满足了协议要求的<code>类,枚举,结构体</code>被称之为<code>协议遵循者</code>.</p>

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<h1 id="-">泛型</h1>
<hr>

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<h1 id="swift-">Swift 教程</h1>
<p>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。</p>