uicollectionview cell position not aligned on grid

Question

I am using a uicollectionview to populate a grid (4x5 cells).Now, sometimes, but not always, I am getting 2 cells that are not aligned with the grid, but they are ~1/4 of the cell size off to the left or right. It appears consistently but not every time the grid is populated.

Has anyone seen this happening before? Any tips on how to identify the cause would be helpful.

cell moved outside the grid

Best solution is http://stackoverflow.com/questions/42956954/ios-horizontally-scrolling-collectionview-with-images/42957646#42957646 — user3182143, Mar 23 '17 at 02:46

score 0 · Answer 1 · edited Mar 23 '17 at 02:38

try to implement

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

    CGFloat cellSize =  [UIScreen mainScreen].bounds.size.width/4;

    return CGSizeMake(cellSize, cellSize);
}

and setting your collection view layout:

 -(void)setCollectionViewLayout {

    UICollectionViewFlowLayout *flow = [[UICollectionViewFlowLayout alloc] init];
    flow.minimumInteritemSpacing = 2;
    flow.minimumLineSpacing = 2;

    [yourCollectionView setCollectionViewLayout:flow];
}

score 0 · Answer 2 · edited May 23 '17 at 12:10

0

I managed to locate a similar error post that resolved the situation for me.

[self.collectionView reloadItemsAtIndexPaths:[self.collectionView indexPathsForVisibleItems]];
then:

[self.collectionView reloadData];

https://stackoverflow.com/a/19100840/7753681

edited May 23 '17 at 12:10

Community

1
1

answered Mar 23 '17 at 11:12

Koen

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1
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uicollectionview cell position not aligned on grid

2 Answers2