How to add desclecting to a UICollectionView, but without multiple selection?

Question

I currently have 4 different views in the view, and I want to allow undo. To do this, I must install:

//Stop multiple selections on collectionview
self.bagsCollectionView.allowsMultipleSelection = YES;
self.shoesCollectionView.allowsMultipleSelection = YES;
self.dressesCollectionView.allowsMultipleSelection = YES;
self.jewelleryCollectionView.allowsMultipleSelection = YES;

However, I only want to select one cell from each collector view. For example, in bagsCollectionView, the user can select one bag, but can also deselect and select a different package. They cannot choose two bags or two shoes. The same goes for the other three kinds of collections!

How to do it?

Answer 1

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- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    NSArray *indexPaths = collectionView.indexPathsForSelectedItems;
    // Don't deselect our own index path
    [indexPaths removeObject:indexPath];
    for (NSIndexPath *otherIndexPath in indexPaths) {
        [collectionView deselectItemAtIndexPath:otherIndexPath animated:YES];
    }
    // ... Do whatever else you need to do in response to the selection
}