学步园

//当有一个或多个手指触摸事件在当前视图或window窗体中响应
-(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;
    NSLog(@"touch (x, y) is (%d, %d)", x, y);
}