iOS: Collection view, selectItemAtIndexPath programmatically doesn't work

user_1833434 0
Viewed 6408

I don't know why this doesn't work. indexOfIcon is correct, section is correct (checked with NSLog) If I select one everything is correct. But this line doesn't do a thing...why? If selected it should have a blue border. This works great while doing it "manually" but not with code..

- (void)viewWillAppear:(BOOL)animated
{
    NSUInteger indexOfIcon;
    if(self.mainCategory.icon){
        indexOfIcon = [self.icons indexOfObject: self.mainCategory.icon];
    } else {
        indexOfIcon = 0;
    }
    [self.collectionView selectItemAtIndexPath:[NSIndexPath indexPathForRow:indexOfIcon inSection:0] animated:YES scrollPosition:UICollectionViewScrollPositionBottom];
}
uicollectionview ios
2 Answers

After years selection seems to work fine (even in viewDidLoad:)

NSIndexPath *indexPath = [NSIndexPath indexPathForItem:0 inSection:0];
[_collection selectItemAtIndexPath:indexPath animated:NO scrollPosition:UICollectionViewScrollPositionLeft];

successfully triggers cell's -setSelected:

user_52723160
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