objective-c - 用 2 根手指捏合时禁用 UIScrollView 中的平移

Question

我想在检测到第二次触摸后停止滚动，并用我自己的捏合手势处理触摸。我在 ScrollView 中试过这个:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    if(event.allTouches.count > 2)self.panGestureRecognizer.enabled = NO;
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    if(event.allTouches.count > 2)self.panGestureRecognizer.enabled = YES;
}

但它不起作用。

试试这个:

scroll.panGestureRecognizer.maximumNumberOfTouches = 1;

但是没有

Answer 1

我找到了解决方案。我重新定义了 UIScrollView，并添加:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}

并禁用\启用平移手势:

if(pinch.state == UIGestureRecognizerStateBegan) scroll.panGestureRecognizer.enabled = NO; 
if(pinch.state == UIGestureRecognizerStateEnded) scroll.panGestureRecognizer.enabled = YES; 

现在我的捏合手势起作用了。