Programmatically setting a UICollectionViewCell as Selected but indexPathsForSelectedItems.count is 0

Question

I programmatically set a custom UICollectionViewCell called CheckCell to be selected as follows:

[self.myCollectionView cellForItemAtIndexPath:indexPath] setSelected:YES];

if ([[self.myCollectionView cellForItemAtIndexPath:indexPath] isSelected]) {
   NSLog(@"Selected");
}

NSLog(@"%i",[self.myCollectionView indexPathsForSelectedItems].count);

The first NSLog prints "Selected" leading me to believe the cell at IndexPath is indeed selected. However, the result of the second NSLog is 0. Why is the selected cell's index not being added to indexPathsForSelectedItems?

Answer 1

Here is the answer.

Call selectItemAtIndexPath instead of [self.myCollectionView cellForItemAtIndexPath:indexPath] setSelected:YES];

Example Code:

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0] ;

[self.collectionView selectItemAtIndexPath:indexPath animated:YES scrollPosition:UICollectionViewScrollPositionNone];

if ([[self.collectionView cellForItemAtIndexPath:indexPath] isSelected]) {

    NSLog(@"selected count %i",[self.collectionView indexPathsForSelectedItems].count);
}

OutPut

selected count 1