在UIScrollView的子视图中禁用水平滚动

Question

I have 3 UIScrollViews , call them A , B , and C .

A is a Paging scrollview, that has many B scrollviews added as subviews (the pages). B only scrolls vertically. C is a scrollview added as a subview to a UIView that is added as a subview to B .

The functionality I am trying to achieve is:

Disallow paging of A if a horizontal scroll is happening within the UIView that is housing C . However, still allow the vertically scrolling of B .

Answer 1

Implement the - (void)scrollViewDidScroll:(UIScrollView*)scrollView to find out which scrollview is scrolling and then check contentOffset property of scrollview to determine the scrolling position of scrollviews. scrollViewDidEndDecelerating delegate can be used to detect the end of scrolling.

for eg:-

- (void)scrollViewDidScroll:(UIScrollView*)scrollView {
    if (scrollView == C) {
       //disable scrolling of A
    }
}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
    if (scrollView == C) {
        //enable scrolling of A
    }
}

Based on your exact requirement, you can use these two delegates and contentOffset of that particular scrollview to get the desired effect.