Collection View Dynamic Cell size in ios

Question

How can I achieve this by Collection view?? I have tried sizeForItemAtIndexPath but it didn't work as i want?

Can anyone suggest me how to do it??

Edit: I have done:

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

{

if (indexPath.item==0)
{

     return CGSizeMake(200,200);
}
else
{

    return CGSizeMake(90,90);

}

and got response :

Answer 1

use a UICollectionViewDelegateFlowLayout method to specify the size you want for each cell. This method is:

Objc:

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

Swift

func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {

  }

Define the CGSize you want and your cells will take width and height you define.

Your UIViewController must implement UICollectionViewDelegateFlowLayout Protocol