james-b-kelly

//In your UIViewController (containing the UICollectionView).
//In @interface
  @property (nonatomic, strong) MyCollectionViewCellSubclass *prototypeCell;

//In viewDidLoad
  //Register your subclassed cell, and load your prototype cell.
    UINib *cellNib = [UINib nibWithNibName:@"MyCollectionViewCellSubclass" bundle:nil];
    [collectionView registerNib:cellNib forCellWithReuseIdentifier:@"MyCollectionViewCellSubclassID"];
    self.prototypeCell = [cellNib instantiateWithOwner:nil options:nil][0];
  

james-b-kelly

//In UICollectionViewCell subclass implementation
- (UICollectionViewLayoutAttributes *)preferredLayoutAttributesFittingAttributes:(UICollectionViewLayoutAttributes *)layoutAttributes {
    layoutAttributes.size = CGSizeMake(layoutAttributes.frame.size.width, layoutAttributes.frame.size.height);
    return layoutAttributes;
}

//In your view controller (containing the UICollectionView).
    //In @interface
    @property (nonatomic, strong) UICollectionViewFlowLayout *layout;

james-b-kelly

//Set up your tableview/collection view in IB with a bottom layout constraint with an IBOutlet.
- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(adjustTableViewHeight:)
                                                 name:UIKeyboardDidShowNotification
                                               object:nil];
}

- (void)adjustTableViewHeight:(NSNotification*)notification {