Odd numberOfItems in UICollectionVIew - iphone

Question

I am using UICollectionView and my app crashes because I have odd number of items in my list but while I need to tow the items in section.
This is my the numbet of items in every section:
(NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section
{
return 2;
}
Here is the problem:
In my list i have 3 items and when the objectAtIndex is 3 the app crashes
MSCoupon *coupon = [list objectAtIndex:indexPath.section * 2 + indexPath.row];
Do you have any solution for me?

Answer 1

This is happening because collection view is trying to access the 2nd element of 2nd section. which resulting in crash because your formula creating index 3.
For second element of section section Your formula
indexPath.section * 2 + indexPath.row
gives
1*2 + 1 = 3
Since your array have 3 element only it will through exception when you try to access fourth element.(array index start with 0).
In Collection view delegate you write this formula. leave rest of your code un-touch it should work
(NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section {
return (list.count/(section + 1)) >= 2? 2: 1;
}

Answer 2

My solution is as follows:
- (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section
{
//return 2;
return [list count];
}
and:
- (NSInteger)numberOfSectionsInCollectionView: (UICollectionView *)collectionView
{
//return [list count]/2;
return 1;
}
Do you have a better advice for me?