ios - UIPanGestureRecognizer 如何获取相对于 [gestureRecognizer View ] 的触摸坐标

Question

在我的代码中，我需要找到用户触摸且当前正在平移的坐标。 我根据 - Touch Coordinates from UIPanGestureRecognizer 设置了以下代码

它看起来如下:

    CGPoint pos = [gestureRecognizer locationInView:[gestureRecognizer view]];

但是，此方法返回的值要么是负数，要么大于 View 自己的框架。怎么可能？我究竟做错了什么？

谢谢

Answer 1

试试这个，它给我 x 和 y 的坐标

-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    CGPoint touchPoint = [gestureUp locationOfTouch:0 inView:gestureUp.view];
    if (touchPoint.y <= 160)
    {
        if (gestureUp.direction == UISwipeGestureRecognizerDirectionUp)
        {
            NSLog(@"the location x...%f",touchPoint.x);
            NSLog(@"the location y...%f",touchPoint.y);
        }
        else
        { }
    }
    return YES;
}