objective c - Selecting all the items in UICollectionView iOS, even the cells that are not visible

Question

I am in the middle of creating an application where I have a button on a tool bar which selects all the items inside a collection view.

But the problem that I am facing is, when I tap on the button it selects only those items that are visible on the screen. This is due to the CELL REUSE functionality.

Is there any way that I can select all the cells, even those which are not currently visible to the user?

Thanks J

Answer 1

This is possible even with cell reuse. You can select all cells in the first section through:

for (NSInteger row = 0; row < [self.collectionView numberOfItemsInSection:0]; row++) {
    [self.collectionView selectItemAtIndexPath:[NSIndexPath indexPathForRow:row inSection:0] animated:NO scrollPosition:UICollectionViewScrollPositionNone];
}

If you have more than 1 section, just use another nested for loop to loop through all the sections.