I am adjusting a detail view controller's state, just before it is pushed on a navigationController
:
[self.detailViewController detailsForObject:someObject];
[self.navigationController pushViewController:self.detailViewController
animated:YES];
In the DetailViewController
a scrollView resides. Which content I resize based on the passed object:
- (void)detailsForObject:(id)someObject {
// set some textView's content here
self.contentView.frame = <rect with new calculated size>;
self.scrollView.contentSize = self.contentView.frame.size;
self.scrollView.contentOffset = CGPointZero;
}
Now, this all works, but the scrollView adjusts it's contentOffset
during the navigationController's slide-in animation. The contentOffset
will be set to the difference between the last contentSize and the new calculated one. This means that the second time you open the detailsView, the details will scroll to some unwanted location. Even though I'm setting the contentOffset
to CGPointZero
explicitly.
I found that resetting the contentOffset
in - viewWillAppear
has no effect. The best I could come up with is resetting the contentOffset in viewDidAppear
, causing a noticeable up and down movement of the content:
- (void)viewDidAppear:(BOOL)animated {
self.scrollView.contentOffset = CGPointZero;
}
Is there a way to prevent a UIScrollView
from adjusting its contentOffset
when its contentSize
is changed?
Occurs when pushing a UIViewController
containing a UIScrollView
using a UINavigationController
.
iOS 7
Solution 1 (Code)
Set @property(nonatomic, assign) BOOL automaticallyAdjustsScrollViewInsets
to NO
.
Solution 2 (Storyboard)
Uncheck the Adjust Scroll View Insets
iOS 6
Solution (Code)
Set the UIScrollView
's property contentOffset
and contentInset
in viewWillLayoutSubviews
. Sample code:
- (void)viewWillLayoutSubviews{
[super viewWillLayoutSubviews];
self.scrollView.contentOffset = CGPointZero;
self.scrollView.contentInset = UIEdgeInsetsZero;
}