UICollectionView - Scrolling to first cell

Question

I\'m making use of UICollectionView and I need to scroll to first cell after click in a button.

The button is located in a (big) header section in my collection view...

Answer 1

You can use this for Objective - C

        [self.restaurantCollectionView setContentOffset:CGPointZero animated:YES];

Answer 2

 scrollView.setContentOffset(CGPoint(x: 0.0, y: 0.0), animated: true)

Answer 3

Use this delegate method, setting the indexPath at the first position:

Swift

self.collectionView?.scrollToItemAtIndexPath(NSIndexPath(forItem: 0, inSection: 0), 
                                                atScrollPosition: .Top, 
                                                        animated: true)

Swift 3

self.collectionView?.scrollToItem(at: IndexPath(row: 0, section: 0), 
                                  at: .top, 
                            animated: true)

Objective-C

[self.collectionView scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:0 inSection:0] 
                            atScrollPosition:UICollectionViewScrollPositionTop
                                    animated:YES];

Change UICollectionViewScrollPositionTop if you want to scroll and stop at a different position

Answer 4

It might be possible to use the UIScrollView related property

collectionView.contentOffset.x = 0

Answer 5

if let indexPath = self.collectionView?.indexPathForItem(at: CGPoint(x: 0, y: 0)) {
            self.collectionView?.scrollToItem(at: indexPath, at: .top, animated: false)
}

Answer 6

Default CollectionView Delgeate...

- (void)scrollToItemAtIndexPath:(NSIndexPath *)indexPath atScrollPosition:(UICollectionViewScrollPosition)scrollPosition animated:(BOOL)animated;