Question

ios uiviewcontroller怎么实现触摸事件

Answer 1

ios uiviewcontroller处理触摸事件的方法是：
在UIViewController的子类中重写以下几个函数：
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
当手指接触到屏幕时触发
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
当手指在屏幕上滑动时
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
当手指滑动一段后离开屏幕时
-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
当有系统事件发生要取消触摸事件时

从(UIEvent *)event中提取所有触摸事件
UITouch *touch = [[event allTouches]anyObject];

取得触摸事件对应的NSView
[touch view];

取得触摸事件对应NSView的座标
CGPoint touchLocation = [touch locationInView:self.view];