基本手势的区别

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

开始触摸时的

- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

当被电话，短信，通知打断时的

- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

 当手指离开屏幕时

- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

手指在屏幕移动时