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I am using a UICollectionView programmatically. I've set its frame as follows: UICollectionView *collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 3000) collectionViewLayout:flowLayout]; My UICollectionViewFlowLayout has a section inset set as: flowLayout.sectionInset = UIEdgeInsetsMake(20.0, 20.0, 100.0, 20.0); I also only have 1 section. I've set the height to be 3,000 to see if the collection view would scroll but it doesn't. I am setting it to that since the collection view doesn't seem to scroll up or down when I insert new items. UICollectionView is subclassed from a UIScrollView , which means I can keep resetting the scroll view content size. Would this work properly? The only issue is that this would work if I know the sizes of all items including how many items are on each row. If each item had a different size, how would I find out the size of each row? I would need that to add all row sizes and increase the content size height of self.collectionView . EDIT Even my suggestion above, resetting the content size, does not work properly! I tried the following when updating my collection view: int numberOfRows = self.dataArray.count / 3; self.collectionView.contentSize = CGSizeMake(self.view.frame.size.width, (numberOfRows * 200) + 300); This is very ugly though. This is because it assumes all my images are of size 200x200px, which fits 3 images per row (hence the division by 3). Furthermore, even with the +300 that I have, the last row I can only see about 3/4 of it and not all of it. I have to scroll more and I will be able to see it but it goes back up again to 3/4. Its kind of like the scroll to refresh, where the view only moves if you drag it and when you leave it bump

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