2 collection views in 1 view controller

Sunday, 17 July 2016 / Published in Android, Application, development

The idea:

We need to use 2 collection views in 1 view controller. First collection view has no header and the second has a header.

So we need to register header(nib) for the second collection view controller only.

 

 

 

 

By calling this code:

code1

best soccer dropping odds footballdroppingodds.com dropping odds movements and best football odds for today
today football predictions from the experts todayfootballpredictions.com best football predictions and betting tips

But the app crash after the above method invoke:

code4

code3

 

How you fix it?

 

Issues come from thie method below that set the header’s size for collection view:

(CGSize)collectionView:(UICollectionView *)collectionView layout:   (UICollectionViewLayout*)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section

 

It will call the method below for providing header to all collection view:

(UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{

Note: our first collection don’t register the header class but the method invoke for providing header for the first collection view too.

 

You can fix it by providing the header’s size of the first collection view with size 0.

Example:

code4