UICollectionViewCell dynamic height with autolayout

Question

I am using auto layout with UICollectionViewCell. So the idea is to allow CollectionViewCell to determine it\'s size based on layouts. All the constraints are set properly b

Answer 1

I think you should return this size:

return [cell systemLayoutSizeFittingSize:UILayoutFittingCompressedSize];

Answer 2

here is the solution

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
    YourCollectionCell * cell = (YourCollectionCell *) [YourCollectionViewObj cellForItemAtIndexPath:indexPath];

            if (cell == nil) {

                NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"YourCollectionCell" owner:self options:nil];
                cell = [topLevelObjects objectAtIndex:0];
                cell.frame = CGRectMake(0, 0, CGRectGetWidth(self.view.frame), 20);
                // SET YOUR CONTENT
                [cell layoutIfNeeded];

            }

            CGSize CellSize = [cell systemLayoutSizeFittingSize:UILayoutFittingCompressedSize withHorizontalFittingPriority:UILayoutPriorityDefaultHigh verticalFittingPriority:UILayoutPriorityDefaultLow];


            return CellSize;
 }

Answer 3

For your dynamic height of the UICollectionViewCell in UIcollectionViewcontroller , you need to implement below method: -

(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath