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, so the "0" height is actually "44". I assume it might be adding this space to consider the navigation bar height (I just assume). Since my UICollectionView is only on part of the screen, I don't want this margin. Is there a way to remove it?

similar woe ? http://stackoverflow.com/questions/24916006/in-a-uicollectionview-the-cells-will-not-sit-on-the-bottom — Fattie, Jul 23 '14 at 16:41

score 195 · Accepted Answer · answered Oct 16 '13 at 19:08

195

The issue may be in collection view's content insets. Try to add self.automaticallyAdjustsScrollViewInsets = NO; into view controller's viewDidLoad method.

answered Oct 16 '13 at 19:08

Sviatoslav Yakymiv

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Works great. It's very strange this thing cannot be addressed on the storyboard. – bashan Oct 19 '13 at 19:12
10

This is the dumbest thing I've ever seen! So many hours wasted! – Kyle Redfearn Aug 29 '14 at 18:10
3

I have Spent hoursss on it :) Thanks a lot mate – WaaleedKhan Oct 01 '14 at 06:19
12

@bashan It can be done on storyboard, there is a checkbox named "Adjust Scroll View Insets" – aryaxt May 11 '15 at 16:58
I have been working for the same issue since one and half day. I was trying to find the reason. But this worked for me like a charm. Answer really deserves upvotes. Thanks and upvoted !!! – NSPratik Jul 02 '15 at 06:49
i have spend hours and finally get this right answer ! thanks – Deeper Jul 07 '15 at 05:39
11

Note that if you are using an embed segue, and your collection view controller is the embedded controller, you need to call this method to the PARENT controller, and not inside your UICollectionViewController – csotiriou Jul 16 '15 at 19:57
Lifesafer, wasted hours on this – Mitchell Currie Sep 02 '15 at 11:32
Apple??? Real strange. They should handle this better. Thank you for the answer, saved me a lot of time! – zumzum Jan 24 '16 at 06:08
1

i had a tab bar controller added too. I selected by TabBarController in the storyboard and Unchecked ```Under Top Bars``` of ```Extend Edges```. I also unchecked ```Adjust Scroll View Insets``` in both TabBarController and my CollectionView and it worked perfectly – kishorer747 Jun 10 '16 at 13:44
Good bye day of my life – Andrespch Nov 21 '16 at 22:43
@RamySabry, https://developer.apple.com/reference/uikit/uiviewcontroller/1621372-automaticallyadjustsscrollviewin – Sviatoslav Yakymiv Feb 06 '17 at 10:52
1

this answer saved us from being fired! :) Thanks a lot. – J. Goce Feb 22 '17 at 09:25
2

This is deprecated starting iOS 11. – Van Du Tran Nov 10 '17 at 17:45
@VanDuTran did u get relevent ans for iOS 11 ?? also fetching same issue. – Tushar Lathiya Aug 06 '18 at 09:59
this is the correct answer - regardless if you do it programmatically or via storyboard – iDoc Dec 02 '19 at 15:17
available in iOS 13. But need in iOS 12 – Vyachaslav Gerchicov Dec 28 '20 at 09:02

score 87 · Answer 2 · answered Jan 14 '14 at 11:54

87

You can set this in the storyboard too.

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

enter image description here

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;
}

answered Jan 14 '14 at 11:54

siburb

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Thanks dude, this save me a loot of time and progress, really saved. – Darklex Apr 22 '15 at 18:25

score 17 · Answer 3 · edited May 23 '17 at 12:34

I found that adding:

self.edgesForExtendedLayout = UIRectEdgeNone;

In the view controller I was loading the UICollectionView in solved the problem as I couldn't get the accepted answer to work.

The question I found this answer to can be found here and provides an extremely in-depth and interesting explanation of the difference between automatically adjusted scrolled view insets, extended layouts and edge for extended layouts.

Well worth a read

score 6 · Answer 4 · edited Jan 27 '17 at 04:24

Swift 3:

First you want to set the viewControllers automaticallyAdjustsScrollViewInsets to false:

self.automaticallyAdjustsScrollViewInsets = false

Then, you should be able to adjust the edge insets accordingly:

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
    //top, left, bottom, right
    return UIEdgeInsets(top: 10, left: 0, bottom: 0, right: 0)
}

score 5 · Answer 5 · answered Oct 16 '13 at 18:57

Maybe you can try to force this value at 0 using the Delegate flow layout of collection view :

- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
{
    return UIEdgeInsetsMake(PADDING_TOP, PADDING_LEFT, PADDING_BOTTOM, PADDING_RIGHT);
}

Modify the value of your padding.

score 1 · Answer 6 · answered May 06 '19 at 19:22

As some others mentioned, viewController.automaticallyAdjustsScrollViewInsets has been deprecated since iOS 11. My solution...

Swift 4.2, Xcode 10.1, iOS 12.1:

For some reason, collectionView.contentSize.height was appearing smaller than the resolved height of my collection view. First, I was using an auto-layout constraint relative to 1/2 of the superview's height. To fix this, I changed the constraint to be relative to the "safe area" of the view.

This allowed me to set the cell height to vertically fill my collection view using collectionView.contentSize.height:

private func setCellSize() {
    let height: CGFloat = (collectionView.contentSize.height) / CGFloat(numberOfRows)
    let width: CGFloat = view.frame.width - CGFloat(horizontalCellMargin * 2)

    let layout = collectionView.collectionViewLayout as! UICollectionViewFlowLayout
    layout.itemSize = CGSize(width: width, height: height)
}

Before

After

score 1 · Answer 7 · answered May 12 '20 at 21:52

1

Swift 5.2 / Xcode 11.3

viewController.automaticallyAdjustsScrollViewInsets

has been deprecated since iOS 11.

My solution:

collectionView.contentInsetAdjustmentBehavior = .never

answered May 12 '20 at 21:52

Abdurrahman

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score -1 · Answer 8 · answered Mar 15 '20 at 03:32

-1

Try using self.feedCollectionView.contentInsetAdjustmentBehavior = .never on the collection view. This actually worked for me.

answered Mar 15 '20 at 03:32

Samarey

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score -3 · Answer 9 · answered Jul 02 '15 at 00:30

-3

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

- (void) viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];

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

answered Jul 02 '15 at 00:30

liviucmg

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UICollectionView adds top margin

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