ibaction

问题 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? 回答1: IBAction and IBOutlet are macros defined to denote variables and methods that can be referred to in Interface Builder. 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. If you're not going to be