Assertion failure when trying to create a UICollectionViewCell - ios

Question

I'm trying to create a UICollectionView with a customize nib. To do that, I'm doing the same thing I'm doing with UITableView :
MyCollectionViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
myCollectionView.delegate = self;
myCollectionView.dataSource = self;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
MyCollectionCell *cell = [MyCollectionCell newCellOrReuse:collectionView atIndexPath:indexPath];
return cell;
}
MyCollectionCell.m
+ (MyCollectionCell *)newCell
{
UIViewController *vc = [[UIViewController alloc] initWithNibName:#"MyCollectionCell" bundle:nil];
MyCollectionCell *cell = (MyCollectionCell *)vc.view;
[cell initCell];
return cell;
}
+ (MyCollectionCell *)reuse:(UICollectionView *)collectionView atIndexPath:(NSIndexPath *)indexPath
{
NSString *rid = #"MyCollectionCell";
return (MyCollectionCell *)[collectionView dequeueReusableCellWithReuseIdentifier:rid forIndexPath:indexPath];
}
+ (MyCollectionCell *)newCellOrReuse:(UICollectionView *)collectionView atIndexPath:(NSIndexPath *)indexPath
{
MyCollectionCell *cell = [MyCollectionCell reuse:collectionView atIndexPath:indexPath];
if (!cell) cell = [MyCollectionCell newCell];
return cell;
}
- (void) initCell
{
}
I get an error
*** Assertion failure in -[UICollectionView _dequeueReusableViewOfKind:withIdentifier:forIndexPath:], /SourceCache/UIKit/UIKit-2380.17/UICollectionView.m:2249
on this line
return (MyCollectionCell *)[collectionView dequeueReusableCellWithReuseIdentifier:rid forIndexPath:indexPath];
I don't really get what's happening. It hase something to do with the reuse because if I call only [MyCollectionCell newCell]; it works. Actually It works only on iOS6.
On iOS7 I get *** Assertion failure in -[UICollectionView _createPreparedCellForItemAtIndexPath:withLayoutAttributes:applyAttributes:], /SourceCache/UIKit_Sim/UIKit-2903.23/UICollectionView.m:1367
Thanks for your help !

Answer 1

- (void)viewDidLoad {
[super viewDidLoad];
myCollectionView.delegate = self;
myCollectionView.dataSource = self;
[collectionView registerNib:[UINib nibWithNibName:#"MyCollectionCell" bundle:nil] forCellWithReuseIdentifier:#"MyCollectionCell"];
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
NSString *rid = #"MyCollectionCell";
return (MyCollectionCell *)[collectionView dequeueReusableCellWithReuseIdentifier:rid forIndexPath:indexPath];
}
Then in MyCollectionCell.m do away with all your class methods and call initCell from awakeFromNib. i.e.:
-(void)awakeFromNib {
[super awakeFromNib];
[self initCell];
}