Programmatically selecting UICollectionView cell which are not loaded yet

Question

I am trying to programmatically scroll to UICollectionView cell using

[_calendarView collectionView:_calendarView.calendarCollectionView didSelectItemAtIndexPath:indexpath];

When I retrieve cell using that index path, it gives me nil cell. I think this cell is not loaded yet. Any solution.

Answer 1

First, set an instance variable to indicate you want the cell selected.

self.selectedIndexPath = indexPath;

Next, scroll to the cell using:

[_calendarView scrollToItemAtIndexPath:indexPath atScrollPosition: UICollectionViewScrollPositionNone animated:YES];

When returning a cell from collectionView:cellForItemAtIndexPath: , compare to the instance variable. When you have a match, select the cell and then set the instance variable to nil .

Answer 2

Try Using the below method of UICollectionViewDelegate:

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

params-

indexpath : index path of the cell

animated : YES/NO.

scrollPosition : Position of cell when scrolled. choose from following options:

Vertical positions-

UICollectionViewScrollPositionTop                  
UICollectionViewScrollPositionCenteredVertically   
UICollectionViewScrollPositionBottom

Horizontal Positions-

UICollectionViewScrollPositionLeft  
UICollectionViewScrollPositionCenteredHorizontally 
UICollectionViewScrollPositionRight