当我触摸屏幕上的任何地方触摸触发事件时触发.但我无法管理如何像UI
ImageView一样触摸特定对象？
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView: touch.view];
imageView.center = location;
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
[self touchesBegan:touches withEvent:event];
}