iOS触摸事件

             1
            //
             开始触摸
             2 - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
 3     NSLog(@"开始触摸touch");
 4}
 5 6 7// 触摸结束 8 - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
 9     NSLog(@"触摸结束touch");
10}
111213// 移动触摸14 - (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
15     NSLog(@"移动触摸touch");
1617// 1.获取触摸手势18     UITouch *touch = [touches anyObject];
1920// 2.获取触摸的位置(获取一个触摸在某个视图上的位置)21     CGPoint currentPoint = [touch locationInView:self.superview];
2223// 3.根据触摸的位置改变视图的位置24     self.center = currentPoint;
2526}
272829// 触摸被打断30 - (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
31     NSLog(@"触摸被打断touch");
32 }