问题描述
在iPhone的Objective-C编码中使用IBAction和IBOutlet的目的是什么,如果我不使用它会有什么不同吗?
What is the purpose of using IBAction and IBOutlet in Objective-C coding for the iPhone, does it make any difference if I don't use them?
推荐答案
IBAction
和 IBOutlet
是定义的宏,用于表示可以引用的变量和方法在Interface Builder中。
IBAction
and IBOutlet
are macros defined to denote variables and methods that can be referred to in Interface Builder.
IBAction
解析为 void
和 IBOutlet
解析为空,但它们向Xcode和Interface构建器表示可以在接口构建器中使用这些变量和方法将UI元素链接到您的代码。
IBAction
resolves to void
and IBOutlet
resolves to nothing, but they signify to Xcode and Interface builder that these variables and methods can be used in Interface builder to link UI elements to your code.
如果您根本不打算使用Interface Builder,那么您的代码中不需要它们,但如果您要使用它,那么您需要指定 IBAction
表示将在IB中使用的方法, IBOutlet
表示将在IB中使用的对象。
If you're not going to be using Interface Builder at all, then you don't need them in your code, but if you are going to use it, then you need to specify IBAction
for methods that will be used in IB and IBOutlet
for objects that will be used in IB.
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