使用 BlackBerry Dynamics SDK 时如何访问 rootViewController

Question

我正在开发一个带有多个视图控制器的 iOS 13 应用程序（使用情节提要，没有导航控制器，没有启动屏幕）。 为了解除/呈现视图控制器，我使用以下代码：

@objc func onMenuItemUploadsTap(_ sender: UIView) {
    self.view.window!.rootViewController?.dismiss(animated: false, completion: {
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        let vc = appDelegate.getViewController(viewController: .Uploads)
        vc.modalPresentationStyle = .fullScreen
        UIApplication.shared.windows.first!.rootViewController!.present(vc, animated: true, completion: nil)
    })
}

一旦 viewController 被实例化，我将它们保存在 AppDelegate 中，因为用户可以从 viewController 跳转到 viewController 因此 viewController 必须保持它的状态/值，这就是我使用的原因：

let vc = appDelegate.getViewController(viewController: .Uploads)

好的...当我在发布模式下运行应用程序时，只显示初始 viewController（名为：HomeController），而不是我喜欢呈现的“vc”，调试控制台让我知道：

Attempt to present <XXX.UploadController: 0x7ffc71152400> on <UIViewController: 0x7ffc70714c40> whose view is not in the window hierarchy!

注意：UIViewController: 0x7ffc70714c40 不是 HomeController！ （'HomeController' 在 storyboard 中被标记为：Is Initial View Controller）

在调试模式下（没有 BlackBerry SDK）应用运行良好。

我的 AppDelegate::didFinishLaunchingWithOptions...:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
       
    // Override point for customization after application launch.
    
#if !DEBUG
    XXXGDiOSDelegate.sharedInstance.appDelegate = self
    GDiOS.sharedInstance().authorize(XXXGDiOSDelegate.sharedInstance)
#else
    let controller = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "HomeController") as? HomeController
    window = UIWindow()
    window?.makeKeyAndVisible()
    window?.rootViewController = controller
#endif
    return true
}

我的问题： 使用 BlackBerry SDK 时如何访问 rootViewController？

我正在使用： macOS Mojave 10.14.6、xCode 11.1 (11A1027)、BlackBerry_Dynamics_SDK_for_iOS_v6.1.0.170

提前致谢！

我试过了：

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
       
    // Override point for customization after application launch.
    let controller = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "HomeController") as? HomeController
    window = UIWindow()
    window?.makeKeyAndVisible()
    window?.rootViewController = controller

#if !DEBUG
    XXXGDiOSDelegate.sharedInstance.appDelegate = self
    GDiOS.sharedInstance().authorize(XXXGDiOSDelegate.sharedInstance)
#endif
    return true
}

和

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
       
    // Override point for customization after application launch.
    
#if !DEBUG
    XXXGDiOSDelegate.sharedInstance.appDelegate = self
    GDiOS.sharedInstance().authorize(XXXGDiOSDelegate.sharedInstance)
#endif

    let controller = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "HomeController") as? HomeController
    window = UIWindow()
    window?.makeKeyAndVisible()
    window?.rootViewController = controller

    return true
}

Answer 1

我的解决方案...我按照以下说明进行操作（objective-c）：

https://developer.blackberry.com/devzone/files/blackberry-dynamics/ios/_app_user_interface_restrictions.html

（参见：实例化应用程序用户界面）

...并在我的 AppDelegate 中实现了这一点：

成员变量：

var run_once: Bool = false

修改了didAuthorize：

func didAuthorize() -> Void {

    print(#file, #function)

    //I added this if block:
    if !self.run_once {
        self.run_once = true
        let controller = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "HomeController") as? HomeController
        window = UIWindow()
        window?.makeKeyAndVisible()
        window?.rootViewController = controller
        UIApplication.shared.windows.first!.rootViewController = controller
    }
}

现在应用在发布模式下也可以正常运行了。