iphone – 当UIButton被触发时,如何获得touchesBegan坐标？

[myButton addTarget:self action:@SELEctor(dragBegan:withEvent:) forControlEvents: UIControlEventTouchDown];
[myButton addTarget:self action:@SELEctor(dragMoving:withEvent:) forControlEvents: UIControlEventTouchDragInside];
[myButton addTarget:self action:@SELEctor(dragended:withEvent:) forControlEvents: UIControlEventTouchUpInside | UIControlEventTouchUpOutside];

处理以下事件，您可以从以下事件ev获取触摸点，

- (void)dragBegan:(UIControl *)c withEvent:ev {
    NSLog(@"dragBegan......");
    UITouch *touch = [[ev allTouches] anyObject];
    CGPoint touchPoint = [touch LOCATIOnInView:self.view];
    NSLog(@"Touch x : %f y : %f",touchPoint.x,touchPoint.y);
}

- (void)dragMoving:(UIControl *)c withEvent:ev {
    NSLog(@"dragMoving......");
}

- (void)dragended:(UIControl *)c withEvent:ev {
    NSLog(@"dragended......");
}

这不是我自己的答案。我从http://sree.cc/iphone/handling-touche-events-for-uibuttons-in-iphone得到这个代码，做了一些小的改动。