iosobjective-cuicollectionviewuicollectionviewcell

Using UICollectionViewCell with IBOutlet

I wonder if it is possible to use UICollectionViewCell with IBOutlet? As I always get this error

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'the cell returned from -collectionView:cellForItemAtIndexPath: was not retrieved by calling -dequeueReusableCellWithReuseIdentifier:forIndexPath: at index path

Below is my code:

@property (nonatomic, strong) NSMutableArray *cellArray;
@property (nonatomic, strong) IBOutlet UICollectionViewCell *sort1Cell;
@property (nonatomic, strong) IBOutlet UICollectionViewCell *sort2Cell;
@property (nonatomic, strong) IBOutlet UICollectionViewCell *sort3Cell;
@property (nonatomic, strong) IBOutlet UICollectionViewCell *sort4Cell;

- (void)viewDidLoad {
    [super viewDidLoad];

    self.cellArray = [NSMutableArray array];
    [cellArray addObject:sort1Cell];
    [cellArray addObject:sort2Cell];
    [cellArray addObject:sort3Cell];
    [cellArray addObject:sort4Cell];
    [theCollectionView reloadData];
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    UICollectionViewCell *cell = [cellArray objectAtIndex:indexPath.row];
    return cell;  //THE ERROR IS FROM HERE
}

Or perhaps I am missing something?

Solution

  • I wonder if it is possible to use UICollectionViewCell with IBOutlet

    No, it isn't possible. (And even if it is, don't do it.) Cells are reused; they have no permanent existence within the collection view. You never know what cell object will be used at a given section/item position. Therefore you must dequeue the cell every time cellForItemAtIndexPath is called.

    There are ways to obtain a reference to a cell that actually exists within the collection view, at runtime. (Though in many case, the need to do even this is to be regarded as a Bad Smell.)