小编Mic*_*rek的帖子

我确实有一个非 Storyboard、100% 编码的 UIViewController、UICollectionView 和 UICollectionViewCell - 工作完美。

这是有问题的代码：

SceneDelegate 不确定这是否相关。

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?

    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {

        guard let windowScene = (scene as? UIWindowScene) else { return }
        window = UIWindow(windowScene: windowScene)

        let layout = UICollectionViewFlowLayout()
        layout.scrollDirection = .horizontal
        let myController = MyViewController(collectionViewLayout: layout)
        window?.rootViewController = myController
        window?.makeKeyAndVisible()
    }
.
.

ViewController 非常简单直接......

class MyViewController: UICollectionViewController, UICollectionViewDelegateFlowLayout {
    let data = loadOnboardingData()
.
.
override func viewDidLoad() …