Ho una funzione che aggiorna UICollectionView esistente. UICollectionView è stato creato, posso vederlo, ma quando voglio accedere alle sue celle per aggiornarlo, sono nulle.UICollectionView cellForItemAtIndexPath è nil
-(void)finishExam{
for (int i = 0; i < [self.questionsOverviewCollection numberOfItemsInSection:0]; i++) {
NSLog(@"self.questionsOverviewCollection - %@",self.questionsOverviewCollection);
NSLog(@"cell - %@",[self.questionsOverviewCollection cellForItemAtIndexPath:[NSIndexPath indexPathForRow:i inSection:0]]);
NSLog(@"overviewCell - %@",(OverviewCell*)[self.questionsOverviewCollection cellForItemAtIndexPath:[NSIndexPath indexPathForRow:i inSection:0]]);
NSLog(@"numOfCells - %d", [self.questionsOverviewCollection numberOfItemsInSection:0]);
OverviewCell *cell = (OverviewCell*)[self.questionsOverviewCollection cellForItemAtIndexPath:[NSIndexPath indexPathForRow:i inSection:0]];
[cell finishExam];
}
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
OverviewCell *cell = (OverviewCell*)[collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
[cell someSetUp];
return cell;
}
Log:
self.questionsOverviewCollection - <UICollectionView: 0xa1abc00; frame = (14 219; 217 441); clipsToBounds = YES; opaque = NO; autoresize = W+H; gestureRecognizers = <NSArray: 0xe0617a0>; layer = <CALayer: 0xe0bbb00>; contentOffset: {0, 0}> collection view layout: <UICollectionViewFlowLayout: 0xe0cc3f0>
cell - (null)
overviewCell - (null)
numOfCells - 30
hai trovato tutto cella nulla o si ottiene qualche cellula e dopo che u ottenere nulla? – CRDave