UIScrollView不在ios6中滚动

Question

In my UIViewController I have a UIScrollView and UIView . These are two different view, means UIView is not inside UIScrollView . I have different view on scrollview that i am setting programmatically and increasing contentSize . And this UIView is hidden, i am showing is sometimes. The problem is that when i hide this UIView , that UIScrollView stops scrolling.

Why this happening?

I have set all leading edges to superview of both. Does it matter? Please guide me.

Hi all, I am sharing the image of my ViewController Scene

I am using auto layout (iOS6). Scroll View ContentSize is (768,1400) which i am setting in ViewDidAppear . The View below Scroll View is hidden and Scroll View is scrolling without any problem.

Now if i show and hide the View , the Scroll View locks, its not scrollable now. That is problem i am facing. I am not doing anything in code more than setting content size. If you need any other information, please tell me.

Answer 1

The contentSize in iOS 6 "auto-sizes" itself with auto layout. This means you cannot set the contentSize . There are hacks that suggest setting it in the viewDidAppear call, but I would avoid this. If you read the iOS 6 release notes (search for UIScrollView on the page) it gives you a couple solutions. One of them involve the translatesAutoresizingMaskIntoConstraints property.

Answer 2

Remove all your code related to sizing the scrollview content size. Autolayout uses this while you are scrolling now. After you do this add the following code

// Add 200 points to the bottom of the scroll view
[self.scrollView setContentInset:UIEdgeInsetsMake(0, 0, 200, 0)];
self.scrollView.translatesAutoresizingMaskIntoConstraints= NO;

Answer 3

Without any code, I'll hazard a guess...

This would be typical in a case if your contentSize doesn't exceed the size of your UIScrollView . If you were to, say, hide your view, then change the size of your scroll view and your scroll view exceeds or is equal to your contentSize , then you will not have anything to scroll.

Another possibility is if you have disabled user interaction.