问题描述
我有一个带有几个子视图的 UIScrollView 等等.我也是scrollView的delegate,并实现了- (void)scrollViewDidScroll:(UIScrollView *)scrollView.在我的卷轴下面有另一个视图.
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.
如果滚动视图的 contentOffset 在 x 轴上低于 50px,我想显示该视图,重置"滚动视图的 contentOffset 并取消当前的滚动视图手势,以便用户不会在新视图出现时操作其内容.
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.
我已经实现了这样的方法:
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 } }
我曾尝试将 userInteractionEnabled 属性设置为 NO 但只有在触摸结束后才会生效.而且我尝试了许多其他属性,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 panGestureRecognizer(然后重新启用它).这将取消识别器的当前会话:
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;
斯威夫特
self.scrollView.panGestureRecognizer.isEnabled = false self.scrollView.panGestureRecognizer.isEnabled = true