iOS App Goes to Black Screen

user_727411 0
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I am using a Launch Screen storyboard as well as a Main storyboard in my Swift app. Sometimes the app will show the launch storyboard and then go to a black screen. Other times it correctly goes to the Main storyboard entry point. It almost seems like it is build-dependent in that if I clean and rebuild a few times, a build pop out that behaves properly. Any ideas what may be causing this?

To add some clarification:

  • The SplashScreen.storyboard is set in the target settings (good question).
  • This happens both on real devices and in simulator BUT NOT ALWAYS.
  • I am not doing any networking (synchronous or otherwise) in this stage
  • The blackout seems to happen only when transitioning to one specific view
  • The code for the view's viewWillDisplay and such executes even when blacked out, just nothing VISIBLE is displayed

This might help: I put in the following code in the offending view:

override func viewDidAppear(animated: Bool) {
    print(self.view.layer.bounds.width);
    print(self.view.layer.bounds.height);

}

When the black screen issue occurs, I get 260 and 17. When the view presents correctly, I get the 5s (simulator) dimensions of 320 and 568. Does that help anyone help me?

xcode7 storyboard swift ios
7 Answers

I was faced with the same issue in my device. I managed to fix it by setting the application's main interface via xcode: MyApplication → Main Interface → LaunchScreen.storyboard (or Main.storyboard).

enter image description here

Cheers! :)

user_13734650

Make sure your first View Controller (in my case Navigation Controller) is Initial Controller. Find more details here.

Also, make sure when connecting Initial and Second Controller with Segue you press "Root View Controller" Relationship as you can see on picture here.

I hope it helps!

user_108577070

I fixed this issue by adding this property-value pair to the Info.plist file in the array of values inside Application Scene Manifest → Scene Configuration → Application Session Role → Item 0 (Default Configuration).

<key>UISceneStoryboardFile</key>
<string>Main</string>

That above value is actually present in Info.plist by default, I had accidentally deleted it some time back.

user_115504110

For me, my problem was that I accidentally deleted "Application Scene Manifest" in the Info.plist, make sure that's in there!

user_151399560

I have encountered the same issue today and after debugging for 2hr I got the fix

There are a few things to keep in mind.

  1. Storyboard name should be the same in the following areas:
    • Targets > 'Main target' > General > Deployment info > Main Interface
    • Targets > 'Main target' > Build Settings > UIKit Main Storyboard File Base Name
    • Info.plist > Application Scene Manifest > Scene Configuration > Application Session Role > Item 0 > Storyboard Name
  2. Make sure just below your Storyboard identifier, "Is Initial View Controller" is checked on your main/default ViewController in the storyboard you have set above.
  3. If you have deleted main.storyboard and using another storyboard as your Main Interface or the view hierarchy debugger isn't showing anything it means you have to manually set it as root in SceneDelegate.

To do that refer following code of SceneDelegate.swift 

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
    guard let windowScene = (scene as? UIWindowScene) else { return }
    window = UIWindow(windowScene: windowScene)
    let sb = UIStoryboard(name: "HomeLanding", bundle: nil)
    let vc = sb.instantiateViewController(withIdentifier: "HomeLandingVC")
    window?.rootViewController = vc
    window?.makeKeyAndVisible()
}

Note: Setting window = UIWindow(frame: UIScreen.main.bounds) will break UISceneSession system, that's why we are setting it from current scene

  1. Now you have to set sceneConfig delegate class in your AppDelegate

To do that refer to the following code of AppDelegate.swift

func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
    let config = UISceneConfiguration(name: nil, sessionRole: connectingSceneSession.role)
    config.delegateClass = SceneDelegate.self
    return config
}
user_116909010
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