UICollectionView adds top margin

Question

I want to put a UICollectionView control that shows thumbs horizontally (only a single line of thumbs). For some reason the UICollectionView push the thumbs 44 pixels down,

Answer 1

Similar to @Sviatoslav answer, you can try the following:

- (void) viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];

    yourCollectionView.contentOffset = CGPointMake(0, 0);
}

Answer 2

You can set this in the storyboard too.

Make sure you've selected the ViewController, and then untick "Adjust Scroll View Insets".

I haven't tested what this IB/Storyboard method does on iOS6 though. With the code method you need to check that the VC responds to the method:

if ([self respondsToSelector:@selector(setAutomaticallyAdjustsScrollViewInsets:)]) {
self.automaticallyAdjustsScrollViewInsets = NO;
}

Answer 3

Swift 5.2 / Xcode 11.3

viewController.automaticallyAdjustsScrollViewInsets 

has been deprecated since iOS 11.

My solution:

collectionView.contentInsetAdjustmentBehavior = .never