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-Objective-C开发者对于Swift并不会感到陌生。它采用了Objective-C的命名参数以及动态对象模型，可以无缝对接到现有的Cocoa框架，并且可以兼容Objective-C代码。在此基础之上，Swift还有许多新特性并且支持过程式编程和面向对象编程。
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-用Swift编写iOS和OS X应用将是一场美妙的体验，Swift之后也会不断开发新特性和兼容性。我们对Swift充满信心，你还在等什么！
+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。