2021-01-22

在UITableViewCell内加入UIPanGestureRecognizer时，当在cell上下滑动tableView时发现没有响应。可以在

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer

locationInView:获取到的是手指点击屏幕实时的坐标点；
translationInView：获取到的是手指移动后，在相对坐标中的偏移量

代理方法内判断滑动方向。如果为上下滑动，返回NO，否则返回YES

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {

    UIPanGestureRecognizer *pan = (UIPanGestureRecognizer *)gestureRecognizer;
    CGPoint transLcation = [pan translationInView:view];
    
    CGFloat absX = fabs(transLcation.x);
    CGFloat absY = fabs(transLcation.y);

    if (absY > absX) {
        return NO;
    }
    
    return YES;
}