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

Question

在我的代码中，我需要找到用户触摸并正在平移的坐标。 我已根据 - Touch Coordinates from UIPanGestureRecognizer

设置了以下代码

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，要么大于视图自己的帧。怎么可能？我究竟做错了什么？

由于

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;
}