Swiftui Beta 3 Black Screen

SwiftUI only showing a black screen

In SceneDelegate.swift replace

let window = UIWindow(frame: UIScreen.main.bounds)
window.rootViewController = UIHostingController(rootView: ContentView())
self.window = window
window.makeKeyAndVisible()

with

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

If you had a .environtmentObject attached to ContentView() originally, don't forget to add that onto the ContentView() in the above code.

When you create a new project in Xcode beta 4, the second code block I posted is what is automatically generated in SceneDelegate.swift. The first code block I posted is what was automatically generated in all versions prior to beta 4. As you can see in the second block, the window is now initialized with the scene provided by the SceneDelegate function scene(scene:, session:, connectionOptions:) instead of a CGRect (UIScreen.main.bounds).

SwiftUI iPad app shows black screen on enabling multiple window support

The window must be initialized as

let window = UIWindow(windowScene: scene as! UIWindowScene)

Black screen on launch when migrating to SwiftUI application flow

The best way to get around this seems to be to leave the info.plist configuration that tells it to look for the SceneDelegate class (UISceneDelegateClassName), but delete the scene delegate. This will cause warnings in the console on launch, but the black screen issue will stop happening.

iOS : Black screen appears when run my app

Step 1:-
you need to remove the dependency of scene delegate from info.plist
(follow Step show in above Ans of Dipak Ramoliya)

Step 2:-
comment code in scene delegate file

step 3:-
comment code related to scene delegate in App delegate file (connectingSceneSession method and sceneSessions method)

step 4:- Add window variable in AppDelegate file (var window: UIWindow?)

step 5:- create rootViewController in didFinishLaunchingWithOptions method in App Delegate

ex:-

let appDelegate =  UIApplication.shared.delegate as! AppDelegate
var rootVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "testController") as! TestController
appDelegate.window?.rootViewController = testController

Launch iOS simulator from Xcode and getting a black screen, followed by Xcode hanging and unable to stop tasks

Surprisingly, what worked for me was going to iOS Simulator menu, and pressing "Reset Content and Settings". (in iOS 13, its under Hardware)

Bad: app building starts with black screen

It may come from your AppDelegate. Could you show us you AppDelegate ?

Apple introduce SceneDelegate that can impact your AppDelegate. If you don't want to use SceneDelegate, you should define the UIWindow in the AppDelegate :

var window: UIWindow?

and init your variable :

window = UIWindow(frame: UIScreen.main.bounds)

in

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

I wish it can help you.

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