Dynamic width of UIcollectionviewCell in iOS? - ios

Question

I had an application in which I am taking the width of the collection view cell as:
- (UIEdgeInsets)collectionView:
(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
return UIEdgeInsetsMake(20, 20,20,20);
}
- (CGSize)collectionView:(UICollectionView *)collectionView
layout:(UICollectionViewLayout *)collectionViewLayout
sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
CGRect screenRect = collection.frame;
CGFloat screenWidth = screenRect.size.width;
float cellWidth = screenWidth / count;
}
But now I want on that count the width of the cell needs to be dependent on one parameter, like:
NSDictionary *dict=[arr objectAtIndex:indexPath.item];
float duration=([[dict valueForKey:#"duration"]floatValue]);
If duration is 45 then it needs to take 45% of the screen width and like that. Can anybody help me on This when i am trying screenWidth * (duration/100.0) it is looking like this

Answer 1

- (CGSize)collectionView:(UICollectionView *)collectionView
layout:(UICollectionViewLayout *)collectionViewLayout
sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
CGRect screenRect = collection.frame;
CGFloat screenWidth = screenRect.size.width;
NSDictionary *dict=[arr objectAtIndex:indexPath.item];
float duration=([[dict valueForKey:#"duration"]floatValue]);
float cellWidth = duration / 100;
return CGSize(cellWidth, 60);
}
It helps you.

Answer 2

If You collectionview just consist of this cells, then i would recommend you to go with section approach.
multiple section for each item , and each section has only one row . By this approach there will be only one row in section and as you wanted even if row size is 10% or less.
keep size approach like below.
NSDictionary *dict=[arr objectAtIndex:indexPath.item];
float duration=([[dict valueForKey:#"duration"]floatValue]);
float cellWidth = screenWidth * (duration/100.0);