UICollectionViewCell subclass init never run

Question

I have added a collection view in viewDidLoad like this...

self.collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 0, 10, 10) collectionViewLayout:flowLayout]; self.collectionView.delegate = self; self.collectionView.dataSource = self; self.collectionView.backgroundColor = [UIColor whiteColor]; [self.collectionView registerClass:[CameraCell class] forCellWithReuseIdentifier:CameraCellReuseIdentifier]; [self.collectionView setTranslatesAutoresizingMaskIntoConstraints:NO]; [self.view addSubview:self.collectionView]; 

And I have a UICollectionViewCell subclass called CameraCell with an init like this...

- (id)init {     self = [super init];     if (self) {         // Add customisation here...         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(imageChanged:) name:@"image" object:nil];          self.contentView.backgroundColor = [UIColor yellowColor];          self.imageView = [[UIImageView alloc] initWithFrame:CGRectZero];         self.imageView.contentMode = UIViewContentModeScaleAspectFill;         self.imageView.clipsToBounds = YES;         [self.imageView setTranslatesAutoresizingMaskIntoConstraints:NO];         [self.contentView addSubview:self.imageView];          NSDictionary *views = NSDictionaryOfVariableBindings(_imageView);          [self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_imageView]|"                                                                                  options:0                                                                                  metrics:nil                                                                                    views:views]];          [self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|[_imageView]|"                                                                                  options:0                                                                                  metrics:nil                                                                                    views:views]];     }     return self; } 

But when I run the app the collection view is there and I can scroll it but I can't see any cells. I have added a breakpoint in the cell's init and it never gets called. Is there another method I have to override?

EDIT

When I log the cell in cellForItemAtIndexPath...

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {     CameraCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:CameraCellReuseIdentifier forIndexPath:indexPath];      NSLog(@"%@", cell);      return cell; } 

It displays the correct class...

<CameraCell: 0x1f07ba30; baseClass = UICollectionViewCell; frame = (0 20; 320 280); layer = <CALayer: 0x1f07bb40>>  

Answer 1

The method you need to implement is - (instancetype)initWithFrame:(CGRect)rect

Answer 2

I recently tried this in the iOS7 SDK, and I had to override initWithCoder because initWithFrame was never called.