Objective C 方法语法澄清
我是 Objective C 新手，正在学习我在网上找到的教程。本教程开始讨论消息传递和参数分离，并给出了一个示例：
当有多个参数时，它们在方法名称中的冒号后面声明。参数在声明中将名称分开，就像在消息中一样。
- (void)setWidth:(float)width: height:(float)height;
我认为宽度后面不应该有冒号，但我可能是错的。根据我的研究，我相信这是一个错字，但由于我是新人，我只是想检查一下。
该方法只是 setWidth: height: 吗？或者在 (float)width 之后除了 height:(float)height 之外还有其他参数吗？
I'm new to Objective C and I'm going through a tutorial I found online. The tutorial starts to talk about messaging and argument separation and gives an example:
When there's more than one argument, they're declared within the method name after the colons. Arguments break the name apart in the declaration, just as in a message.
- (void)setWidth:(float)width: height:(float)height;
I don't think there is suppose to be a colon after width, but I could be wrong. From what I've researched, I believe that it's a typo, but since I am new I just wanted to check.
Is the method just setWidth: height: ? Or is there another argument after the (float)width other than height:(float)height?
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这是一个错字。方法签名应为：
- (void)setWidth:(float)width height:(float)height;方法名称为
setWidth:height:并且您可以调用它像这样：[someObject setWidth:aFloat height:anotherFloat];It's a typo. The method signature should read:
- (void)setWidth:(float)width height:(float)height;The method name is
setWidth:height:and you would call it like this:[someObject setWidth:aFloat height:anotherFloat];你是对的。中间的冒号似乎是一个拼写错误。冒号后面应该有一个变量占位符。如果冒号后面有空格（如本例所示），则这是一个拼写错误。
You are correct. The middle colon seems to be a typo. After a colon, there should be a variable placeholder. If there's a space after a colon (as in this case) it's a typo.
是的，你是对的。那是一个错字。您可以像这样调用该方法：
在文档中引用该方法或对于方法回调，应将其标记为 setWidth:height: （注意尾随冒号）。祝您学习本教程的其余部分一切顺利。
Yep you would be correct. That is a typo. You would call that method like so:
Referencing that method in documentation or for a method callback it should be labeled setWidth:height: (note the trailing colon). Good luck with the rest of the tutorial.