CollectionView scroll to top

Question

I have one CollectionViewController and have 10 cells in it.

But when I run the app it displays the cell at bottom, but I want to display it from top cell at viewDidLoad.

I tried many things but it didn't work.

How to fix it?

Solution 1

Add this line after reloading the collection view.

[self.collectionView scrollToItemAtIndexPath:indexPath atScrollPosition:UICollectionViewScrollPositionTop animated:NO];

Edit:

Just want to add one more point here is if collectionView datasource has ZERO elements or it is nil then above code will not work and probably crash your app.

Write condition to check that datasource is available or not!

if (self.dataArray.count > 0) {
    [self.collectionView scrollToItemAtIndexPath:indexPath atScrollPosition:UICollectionViewScrollPositionTop animated:NO];
}

Where, dataArray is your datasource.

Solution 2

in swift 3: after reloadData()

  self.collectionView.setContentOffset(CGPoint(x:0,y:0), animated: true)

Solution 3

Its work fine......

collectionView.setContentOffset(.zero, animated: false)

Solution 4

Add this piece of code after reloading the collection view:

swift

yourCollectionView.setContentOffset(CGPoint.zero, animated: true)

objective-c

[yourCollectionView setContentOffset:CGPointZero animated:YES];

Solution 5

Swift 4 Swift 5

Actually, it's work just do

collectionView.setContentOffset(.zero, animated: false)

But, if in case your CollectionView implement .contentInset or outer margin, let's say margin top & bottom is set 16, this code will actually back to the top.

collectionView.setContentOffset(CGPoint(x: 0, y: -16), animated: true)

View more solutions

Comments

[Pooja Srivastava]

please share your code..

[KAR]

I am using this, cocoapods.org/pods/SFFocusViewLayout. @PoojaSrivastava

[Jitendra Modi]

@KAR Please share some code and screenshot of what type of collectionviewcell you want to get? Like what is problem ?

[User511]

Are you working in Swift?

[KAR]

No, objective c. @Aisha

[KAR]

where to add this line? @Monika patel

[Monika Patel]

@KAR : Add this line after [self.collectionview reloaddata];

[Monika Patel]

@KAR : Please up vote my answer. If my answer is useful to you

[KAR]

Please up vote the question so it will helpful to others. @Monika Patel

[KAR]

no. view works fine before I rotate it 180. So after that it shows cell from bottom. I flip the view for change animation effect to opposite. @Monika Patel

[KAR]

If you are feeling that this question will be helpful to others than upvote the question. @Aisha

[Ahmadreza]

Works with Swift 4+ too