在UICollectionView之上呈现一个UIViewController可以通过以下步骤实现:
以下是一个示例代码:
class CustomCollectionViewCell: UICollectionViewCell {
var viewController: UIViewController? {
didSet {
if let viewController = viewController {
// 将UIViewController的视图添加到容器视图中
viewController.view.frame = contentView.bounds
contentView.addSubview(viewController.view)
viewController.didMove(toParent: self)
} else {
// 移除之前的UIViewController
for subview in contentView.subviews {
subview.removeFromSuperview()
}
}
}
}
override func prepareForReuse() {
super.prepareForReuse()
viewController = nil
}
}
class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
let collectionView: UICollectionView
override func viewDidLoad() {
super.viewDidLoad()
// 初始化UICollectionView
let layout = UICollectionViewFlowLayout()
collectionView = UICollectionView(frame: view.bounds, collectionViewLayout: layout)
collectionView.dataSource = self
collectionView.delegate = self
collectionView.register(CustomCollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
view.addSubview(collectionView)
}
// UICollectionViewDataSource方法
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 10
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! CustomCollectionViewCell
// 创建并设置对应的UIViewController
let viewController = UIViewController()
viewController.view.backgroundColor = .red
cell.viewController = viewController
return cell
}
// UICollectionViewDelegateFlowLayout方法
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: collectionView.bounds.width, height: 200)
}
}
这样,每个UICollectionViewCell都会包含一个UIViewController,并在UICollectionView中呈现出来。你可以根据需要自定义UICollectionViewCell和UIViewController的样式和布局。
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