Highlight cells in CollectionView

Question

I'm building an app in iOS and I want the Cells in my CollectionView to highlight when touched, pretty much like the normal buttons. How can I achieve this in the didSelectItemAtIndexPath:(NSIndexPath *)indexPath method?

Change the background color of that cell. – user1673099 Oct 24 '13 at 09:45 — user1673099, Oct 24 '13 at 09:45

score 7 · Accepted Answer · edited Dec 31 '13 at 02:55

Try something like this:

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    .....
    if (cell.selected) {
        cell.backgroundColor = [UIColor colorWithRed:255/255.0 green:255/255.0 blue:153/255.0 alpha:1]; // highlight selection
    }
    else
    {
        cell.backgroundColor = [UIColor clearColor]; // Default color
    }
    return cell;
}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
    UICollectionViewCell* cell = [collectionView  cellForItemAtIndexPath:indexPath];
    cell.backgroundColor = [UIColor colorWithRed:255/255.0 green:255/255.0 blue:153/255.0 alpha:1]; //     //cell.lblImgTitle.text = @"xxx";
}

- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath{
    UICollectionViewCell* cell = [collectionView  cellForItemAtIndexPath:indexPath];
    cell.backgroundColor = [UIColor clearColor];
}

I solved it by changing the Alpha of the picture in the cell in the didHighlightItemAtIndexPath and didUnhighlightItemAtIndexPath methods. Anyway, I'll set your answer as the right answer. Thanks. — diogo.appDev, Oct 24 '13 at 10:37
why don't you post how did you solve your issue in the answer? It will be helpful for others ...diogo-appdev — Narasimha Nallamsetty, Mar 26 '15 at 18:16

score 5 · Answer 2 · edited Sep 07 '15 at 06:28

5

If you subclassed the cell class, put this in your .m file

- (void)setSelected:(BOOL)selected
{
    if(selected)
    {
        self.backgroundColor = [UIColor colorWithWhite:0.1 alpha:0.5];
    }
    else
    {
        self.backgroundColor = [UIColor whiteColor];
    }
}

edited Sep 07 '15 at 06:28

BaSha

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answered Mar 17 '15 at 09:55

CyberMew

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score 0 · Answer 3 · answered Oct 24 '13 at 09:53

0

try this

cell.selectedBackgroundView.backgroundColor = [UIColor greenColor];

answered Oct 24 '13 at 09:53

Vaisakh

2,919
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score 0 · Answer 4 · edited Apr 25 '16 at 12:45

why can not change the background color through the cocoa pods?I new a user-defined collectionView cell class`

   - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
        CHSMenuControlCell *cell = (CHSMenuControlCell*)[collectionView  cellForItemAtIndexPath:indexPath];
        cell.backgroundColor = [UIColor colorWithRed:255/255.0 green:255/255.0 blue:153/255.0 alpha:1]; //     //cell.lblImgTitle.text = @"xxx";
    }

    - (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath{
    CHSMenuControlCell *cell = (CHSMenuControlCell *)[collectionView  cellForItemAtIndexPath:indexPath];
    cell.backgroundColor = [UIColor clearColor];
}

Highlight cells in CollectionView

4 Answers4