如何在场景委托 iOS 13 中设置 rootViewController

How set rootViewController in Scene Delegate iOS 13(如何在场景委托 iOS 13 中设置 rootViewController)

问题描述

在 UIKit iOS 13 更改之前，如何在 SceneDelegate 设置 rootViewController?

Before changes in UIKit iOS 13 how I can set rootViewController at SceneDelegate?

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?


    @available(iOS 13.0, *)
    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        guard let _ = (scene as? UIWindowScene) else { return }

    }

推荐答案

仅供参考，因为 SwiftUI 不使用故事板，如果你只是创建一个新的 SwiftUI 项目，它会给你代码；您需要做的就是将 UIHostingViewController 替换为您想要的根 VC，如下所示:

FYI since SwiftUI doesn't use storyboards if you just make a new SwiftUI project it will give you the code; all you need to do is replace the UIHostingViewController with your desired root VC like this:

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

  var window: UIWindow?

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

    if let windowScene = scene as? UIWindowScene {
        let window = UIWindow(windowScene: windowScene)
        window.rootViewController = MyRootViewController()
        self.window = window
        window.makeKeyAndVisible()
    }
  }

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