Variable width & height of UICollectionViewCell using AutoLayout with Storyboard (without XIB)

Question

Here is an design issue in the app that uses AutoLayout, UICollectionView and UICollectionViewCell that has automatically resizable width & height depending on AutoLayout co

Answer 1

Just like when dynamically size Table View Cell height using Auto Layout you don't need call

func tableView(_ tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell

in

optional func tableView(_ tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat

the proper way is create a local static cell for height calculation like a class method of the custom cell

+ (CGFloat)cellHeightForContent:(id)content tableView:(UITableView *)tableView {
    static CustomCell *cell;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        cell = [tableView dequeueReusableCellWithIdentifier:[CustomCell cellIdentifier]];
    });

    Item *item = (Item *)content;
    configureBasicCell(cell, item);

    [cell setNeedsLayout];
    [cell layoutIfNeeded];
    CGSize size = [cell.contentView systemLayoutSizeFittingSize:UILayoutFittingCompressedSize];
    return size.height + 1.0f; // Add 1.0f for the cell separator height
}

and I seriously doubt storyboard is some industry standard. xib is the best way to create custom cell like view including tableViewCell and CollectionViewCell