246 lines
8.5 KiB
HTML
246 lines
8.5 KiB
HTML
<!DOCTYPE HTML>
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<title>Swift初见 | Swift编程语言</title>
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<meta name="description" content="Swift是苹果在WWDC2014上发布的一款全新的编程语言，本书译自苹果官方的Swift教程《The Swift Programming Language》。">
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<h1>
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<a href="./" >Swift编程语言</a>
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</h1>
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<a href="./"><i class="fa fa-check"></i> Introduction</a>
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<a href="./swift/README.html">
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<i class="fa fa-check"></i> <b>1.</b> 欢迎使用Swift
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</a>
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<a href="./swift/swift.html">
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<i class="fa fa-check"></i> <b>1.1.</b> 关于Swift
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</a>
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</li>
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<li class="chapter " data-level="1.2" data-path="a_swift_tour.html">
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<a href="./a_swift_tour.html">
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<i class="fa fa-check"></i> <b>1.2.</b> Swift初见
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</a>
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<a href="http://www.gitbook.io/" target="blank" class="gitbook-link">Generated using GitBook</a>
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<div class="inner" style="width: 100%;min-width: 66.66666666666667%;"></div>
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</div>
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<a href="./index.html" title="Introduction" class="chapter done new-chapter" data-progress="0" style="left: 0%;"></a>
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<a href="./swift/README.html" title="欢迎使用Swift" class="chapter done new-chapter" data-progress="1" style="left: 33.333333333333336%;"></a>
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<a href="./swift/swift.html" title="关于Swift" class="chapter done " data-progress="1.1" style="left: 66.66666666666667%;"></a>
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<a href="./a_swift_tour.html" title="Swift初见" class="chapter done " data-progress="1.2" style="left: 100%;"></a>
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</div>
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</div>
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<div class="page-inner">
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<section class="normal" id="section-gitbook_631">
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<h1 id="swift-">Swift初见</h1>
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<p>通常来说，编程语言教程中的第一个程序应该在屏幕上打印“Hello, world”。在Swift中，可以用一行代码实现：</p>
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<pre><code>println("hello, world")
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</code></pre><p>如果你写过C或者Objective-C代码，那你应该很熟悉这种形式——在Swift中，这行代码就是一个完整的程序。你不需要为了输入输出或者字符串处理导入一个单独的库。全局作用域中的代码会被自动当做程序的入口点，所以你也不需要<code>main</code>函数。你同样不需要在每个语句结尾写上分号。</p>
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<p>这个教程会通过一系列编程例子来让你对Swift有初步了解，如果你有什么不理解的地方也不用担心——任何本章介绍的内容都会在后面的章节中详细讲解。</p>
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<blockquote>
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<p>注意：为了获得最好的体验，在Xcode当中使用代码预览功能。代码预览功能可以让你编辑代码并实时看到运行结果。</p>
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</blockquote>
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</section>
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</div>
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</div>
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</div>
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<a href="./swift/swift.html" class="navigation navigation-prev navigation-unique" aria-label="Previous page: 关于Swift"><i class="fa fa-angle-left"></i></a>
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