取消当前的UIScrollView触摸 [英] Cancel current UIScrollView touch

问题描述

我有一个 UIScrollView ，带有一些子视图，依此类推。我也是scrollView的委托并实现了 - （void）scrollViewDidScroll：（UIScrollView *）scrollView 。在我的卷轴下面还有另一个视图。

I have an UIScrollView with a few subviews and so on. I am also the scrollView's delegate and have implemented the - (void)scrollViewDidScroll:(UIScrollView *)scrollView. Underneath my scroll there is another view.

我想显示该视图，如果scrollView的 contentOffset 在x轴上低于50px，重置scrollView的 contentOffset 并取消当前的scrollView手势，以便用户在新视图出现时不会操纵其内容。

I want to show that view if the scrollView's contentOffset goes under 50px on x axis, "reset" scrollView's contentOffset and cancel the current scrollView gesture so that the user wont manipulate its content when the new view appears.

我有实现了这样的方法：

I have implemented the method like so:

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    if (scrollView.contentOffset.x < -50)
    {
        scrollView.contentOffset = CGPointZero;
        [self showBackView];
        //here I want to cancel the current touch on the scrollview since it keeps scrolling if I drag my finger
    }
}

我试图将 userInteractionEnabled 属性设置为否但只有在触摸结束后才会生效。而且我尝试过其他一些属性，但似乎都没有。

I have tried to set the userInteractionEnabled property to NO but it takes effect only after the touch has ended. And I have tried a bunch of other properties but none seems to work.

我该如何解决这个问题？

How can I fix this?

推荐答案

尝试禁用<滚动视图的code> panGestureRecognizer （然后重新启用它）。这将取消识别者的当前会话：

Try disabling the panGestureRecognizer for the scroll view (and then reenabling it). This will cancel the current session of the recogniser:

self.scrollView.panGestureRecognizer.enabled = NO;
self.scrollView.panGestureRecognizer.enabled = YES;

Swift

Swift

self.scrollView.panGestureRecognizer.isEnabled = false
self.scrollView.panGestureRecognizer.isEnabled = true

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