iOS UIView的Touch事件有哪几种触摸事件？

处理事件的方法

• UIView是UIResponder的子类，可以覆盖下列4个方法处理不同的触摸事件

   //一根或者多根手指开始触摸view   - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event   //一根或者多根手指在view上移动   - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event   //一根或者多根手指离开view   - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event   //触摸结束前，某个系统事件(例如电话呼入)会打断触摸过程   - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event