具有自定义尺寸单元的集合视图不再可以水平滚动

Question

I set up a collection view and got all working with fixed height and width for the cells.

Now I would like to have my Cells self sized, so I found that I can add

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
    layout.estimatedItemSize = CGSize(width: 200, height: 50)
    menuCollectionView.collectionViewLayout = layout
}

With above code my cell resizes by the width (as wanted), but my collection view is not scrollable horizontally anymore, but instead lays out the cells vertically.

Is estimatedItemSize only thought to work for vertical scrolling? What is wrong with my approach?

Answer 1

UICollectionViewFlowLayout的默认滚动方向是垂直的，因此您也需要为新布局设置scrollDirection：

layout.scrollDirection = UICollectionViewScrollDirection.Horizontal