UICollectionView align logic missing in horizontal paging scrollview

Question

I\'ve got a UICollectionView, which works ok, until I start scrolling. Here some pics first:

Answer 1

This is the same problem that I was experiencing and i posted my solution on another post, so I'll post it again here.

I found a solution to it, and it involved subclassing the UICollectionViewFlowLayout.

My CollectionViewCell size is 302 X 457 and i set my minimum line spacing to be 18 (9pix for each cell)

When you extend from that class there are a few methods that need to be over-ridden. One of them is

• (CGSize)collectionViewContentSize

In this method, I needed to add up the total width of what was in the UICollectionView. That includes the ([datasource count] * widthOfCollectionViewCell) + ([datasource count] * 18)

Here is my custom UICollectionViewFlowLayout methods....

-(id)init
{
    if((self = [super init])){

       self.itemSize = CGSizeMake(302, 457);
       self.sectionInset = UIEdgeInsetsMake(10, 10, 10, 10);
       self.minimumInteritemSpacing = 0.0f;
       self.minimumLineSpacing = 18.0f;
       [self setScrollDirection:UICollectionViewScrollDirectionHorizontal];
   }
    return self;
}



-(CGSize)collectionViewContentSize{
   return CGSizeMake((numCellsCount * 302)+(numCellsCount * 18), 457);
}

This worked for me, so I hope someone else finds it useful!