如何根據設備類型（iphone/ipad）在應用程序啟動時調用特定的 storyboard？

Question

我有兩個獨立的故事板，分別用於 iPad 和 iPhone，它們具有相同的類、插座等，但布局不同。

我發現我可以使用UIScreen.main.traitCollection.userInterfaceIdiom檢測應用程序啟動時的設備類型，但現在我需要調用正確的 storyboard。我該怎么做？ 我的方向是否正確？ 我發現與此問題相關的所有內容就像 8-9 年前的帖子，所以有時我什至不理解語法。 提前致謝！

class AppDelegate: UIResponder, UIApplicationDelegate {

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        let iPhoneStoryboard = UIStoryboard(name: "IPhone", bundle: nil)
        let iPadStoryboard = UIStoryboard(name: "IPad", bundle: nil)

        let type = UIScreen.main.traitCollection.userInterfaceIdiom
        
        switch type {
        case .phone:
            // need to call something here
        case .pad:
            // need to call something here
        @unknown default:
            fatalError()
        }

Answer 1

您必須通過instantiateInitialViewController()或instantiateViewController(withIdentifier:)化視圖 controller

class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        let iPhoneStoryboard = UIStoryboard(name: "IPhone", bundle: nil)
        let iPadStoryboard = UIStoryboard(name: "IPad", bundle: nil)

        let type = UIScreen.main.traitCollection.userInterfaceIdiom
        
        switch type {
        case .phone:
            window?.rootViewController = iPhoneStoryboard.instantiateInitialViewController()
        case .pad:
            window?.rootViewController = iPadStoryboard.instantiateInitialViewController()
        @unknown default:
            fatalError()
        }

        window?.makeKeyAndVisible()
    }
}

Answer 2

HII 你可以嘗試將 instantiateViewController 設置為 UINavigationController 並將標識符設置為“Ipad”或“Iphone”，並將 storyboard 的第一個 controller 設置為 UINavigationController 的 rootviewcontroller 並將初始視圖控制設置為 UINavigationController 就像...

@main
class AppDelegate: UIResponder, UIApplicationDelegate {

 var window: UIWindow?
 

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {


  let iPhoneStoryboard = UIStoryboard(name: "IPhone", bundle: nil)
  let iPadStoryboard = UIStoryboard(name: "IPad", bundle: nil)

        let type = UIScreen.main.traitCollection.userInterfaceIdiom
        
        switch type {
        case .phone:
           
         if let IPhone = iPhoneStoryboard.instantiateViewController(withIdentifier: "IPhone") as? UINavigationController {
                    self.window?.rootViewController = IPhone
                }


        case .pad:

       if let IPad = iPadStoryboard.instantiateViewController(withIdentifier: "IPad") as? UINavigationController {
                    self.window?.rootViewController = IPad
                }
        @unknown default:
            fatalError()
        }

   self.window?.makeKeyAndVisible()
   self.window?.makeKey()

 return true


}