我有一个垂直滚动的UIScrollView
。我想在保留默认垂直滚动行为的同时,也处理水平拖动。我在滚动视图上放置了一个透明的UIView
,并添加了一个拖动手势识别器。这样我就可以很好地获取拖动,但是滚动视图却无法接收到任何手势。
我实现了以下UIPanGestureRecognizerDelegate
方法,希望将我的手势识别器限制为仅水平拖动,但这并没有起作用:
- (BOOL)gestureRecognizerShouldBegin:(UIPanGestureRecognizer *)gestureRecognizer {
// Only accept horizontal pans here.
// Leave the vertical pans for scrolling the content.
CGPoint translation = [gestureRecognizer translationInView:self.view];
BOOL isHorizontalPan = (fabsf(translation.x) > fabsf(translation.y));
return isHorizontalPan;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return (otherGestureRecognizer == _scrollView.panGestureRecognizer);
}
[panGesture setCancelsTouchesInView:NO];
吗?在shouldRecognizeSimultaneouslyWithGestureRecognizer
中简单地返回 YES 也可能有助于你找出问题所在。 - Mick MacCallum