问题描述
我有一个 UIScrollView 和另一个 UIScrollView 里面.它们都是水平滚动的并且具有 pagingEnabled = YES.假设我开始滚动内部滚动视图并到达最右边的边界.如果我继续在其中滚动,则外部 scrollView 开始移动.我需要避免这种情况.内视图应以橡皮筋效果跳跃,外视图应保持原位.
I have a UIScrollView with another UIScrollView inside. They both are scrolled horizontally and have pagingEnabled = YES. Assume that I started to scroll inner scroll view and reached the most right bound. And if I proceed scrolling in it, then the outer scrollView begins to move. I need to avoid this. Inner view should jump with rubber-band effect, outer should stay at it's place.
希望很清楚,但这里有一个草图:
Hope it's clear, but here is a sketch:
我试过设置 outerView.scrollEnabled = NO; 像这样:
I've tried to set outerView.scrollEnabled = NO; like this:
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView { outerView.scrollEnabled = NO; }
,它完全按照我的需要工作,如果只是在 innerView 中滚动.OuterView 不再滚动.但是如果我想再次滚动outerView,我必须在某处将scrollEnabled设置回YES.我在这里尝试过:
, and it works exactly how I need, if to scroll just in innerView. OuterView is not scrolled anymore. But I have to set scrollEnabled back to YES somewhere for the case if I'd want to scroll outerView again. I've tried to do it here:
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { outerView.scrollEnabled = YES; }
,但是我遇到了同样的问题:在到达 innerView 的最右侧边界后,outerView 滚动而不是 innerView 以橡皮筋效果跳转.
, but than I'm getting the same problem: after reaching the the most right bound of innerView outerView scrolls instead of innerView jumps with rubber-band effect.
有什么解决问题的建议吗?
Any suggestions how to solve a problem?
推荐答案
更新
此解决方案始终有效:
@implementation InnerScrollViewController <UIScrollViewDelegate, UIGestureRecognizerDelegate> - (void)viewDidLoad { UISwipeGestureRecognizer* swipeGesture = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)] autorelease]; swipeGesture.delegate = self; [self.view addGestureRecognizer:swipeGesture]; } - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch { _outerScrollView.scrollEnabled = NO; return YES; } - (void)handleSwipe:(UIGestureRecognizer*)gestureRecognizer { } - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView { _outerScrollView.scrollEnabled = NO; } - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate { if (!decelerate) { _outerScrollView.scrollEnabled = YES; } } - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { _outerScrollView.scrollEnabled = YES; } @end
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旧答案:并不总是有效
这是我解决问题的方法:
Here is how I solved the problem:
@implementation InnerView - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { self.delaysContentTouches = NO; } return self; } - (BOOL)touchesShouldBegin:(NSSet *)touches withEvent:(UIEvent *)event inContentView:(UIView *)view { return NO; }
据我了解,self.delaysContentTouches = NO; 使所有事件立即传递,并且 - (BOOL)touchesShouldBegin:(NSSet *)touches withEvent:(UIEvent *)eventinContentView:(UIView *)view 阻止响应者链传递这些事件.
As I understand, self.delaysContentTouches = NO; makes all events to be delivered immediately, and - (BOOL)touchesShouldBegin:(NSSet *)touches withEvent:(UIEvent *)event inContentView:(UIView *)view prevents passing of these events by responder chain.