点击时如何让UIButton执行我的类方法？

Question

How can I make a UIButton perform my class method, +doSomething:(id)sender , on class MyClass , after any event like UIControlEventTouchDown ? Can I use -addTarget:action:forControlEvents: like I do for instance methods?

Thanks in advance.

Answer 1

Since classes are also ObjC objects, you can use -addTarget:... as usual:

[button addTarget:[MyClass class]
           action:@selector(classMethod:)
 forControlEvents:UIControlEventTouchUpInside];

Answer 2

Add an in-between method that will call the Class method.

[button addTarget:self action:@selector(callClassMethod:) forControlEvents: UIControlEventTouchDown];

- (void)callClassMethod:(id)sender {
    [MyClass classMethod:sender];
}