如何更改集合视图单元格的布局项目大小？

Question

我有以下代码

//

func setupUI() {

    let flowLayout = UICollectionViewFlowLayout()
    flowLayout.scrollDirection = .horizontal
    flowLayout.itemSize = CGSize(width: CGFloat(collectionItemViewWidth), height: CGFloat(collectionItemViewHeight))
    //For Setting the Spacing between cells
    flowLayout.minimumInteritemSpacing = 25
    flowLayout.minimumLineSpacing = 20

    collectionView = UICollectionView(frame: .zero, collectionViewLayout: flowLayout)
    collectionView.delegate = self
    collectionView.dataSource = self
    collectionView.translatesAutoresizingMaskIntoConstraints = false
    collectionView.showsHorizontalScrollIndicator = false
    collectionView.backgroundColor = UIColor.clear
    let cellReuseIdentifier = "collectionCell"
    self.collectionView.register(LearningItemCollectionViewCell.self, forCellWithReuseIdentifier: cellReuseIdentifier)

    self.contentView.addSubview(collectionView)
    self.collectionView.delegate = self
    self.collectionView.dataSource = self
}

在调用viewDidLoad时调用

在另一个文件DiscoverDiscoverController中，我初始化了上面的CollectionView并调用了setupUI。我使用嵌入了集合视图的表格视图单元格设置了表格视图。有时，我想更改特定行中集合视图单元格的布局项目大小。我该怎么做？