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chapter2/01_The_Basics.html
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<div class="page-inner">
<section class="normal" id="section-gitbook_8">
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<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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chapter2/02_Basic_Operators.html
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<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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chapter2/03_Strings_and_Characters.html
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<h1 id="-strings-and-characters-">字符串和字符 (Strings and Characters)</h1>
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chapter2/04_Collection_Types.html
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chapter2/05_Control_Flow.html
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chapter2/06_Functions.html
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<h1 id="-functions-">函数（Functions）</h1>
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chapter2/07_Closures.html
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<h1 id="-">闭包</h1>
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chapter2/08_Enumerations.html
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<h1 id="-">枚举</h1>
<p>本页内容包含：</p>
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</code></pre><p><code>directionToHead</code>的类型被推断当它被<code>CompassPoint</code>的一个可能值初始化。一旦<code>directionToHead</code>被声明为一个<code>CompassPoint</code>，你可以使用更短的点（.）语法将其设置为另一个<code>CompassPoint</code>的值：</p>
<pre><code>directionToHead = .East
</code></pre><p><code>directionToHead</code>的类型已知时，当设定它的值时，你可以不再写类型名。使用显示类型的枚举值可以让代码具有更好的可读性。</p>
<h2 id="-switch-">匹配枚举值和<code>Switch</code>语句</h2>
<h2 id="-switch-">用<code>Switch</code>语句匹配枚举值</h2>
<p>你可以匹配单个枚举值和<code>switch</code>语句：</p>
<pre><code>directionToHead = .South
switch directionToHead {

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chapter2/09_Classes_and_Structures.html
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<h3 id="-">类和结构体</h3>
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chapter2/10_Properties.html
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chapter2/11_Methods.html
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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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chapter2/12_Subscripts.html
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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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chapter2/13_Inheritance.html
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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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chapter2/14_Initialization.html
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chapter2/15_Deinitialization.html
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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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chapter2/16_Automatic_Reference_Counting.html
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<h1 id="-">自动引用计数</h1>
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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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<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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<h1 id="-">类型嵌套</h1>
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<h1 id="-extensions-">扩展（Extensions）</h1>
<hr>

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chapter2/22_Generics.html
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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>