ios判断点击的坐标点

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

{

NSSet *allTouches = [event allTouches];    //返回与当前接收者有关的所有的触摸对象

UITouch *touch = [allTouches anyObject];   //视图中的所有对象

CGPoint point = [touch locationInView:[touch view]]; //返回触摸点在视图中的当前坐标

int x = point.x;

int y = point.y;

if(y<self.frame.size.height - 500)

{

[self removeFromSuperview];

}

}