Method 'scene(_:openURLContexts:)' is not called - iphone

Question

In the info.plist file I configured URL Identifier and URL Scheme successfully. Also I am able to open the app using the custom URL. The problem is when the app launches for the first time, the method
func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>)
does not get called.
I have some dependent functionality based on the above method. So when the app launches for the first time, I am not able to see anything in my app.
Also I added code in the method
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
guard let _ = (scene as? UIWindowScene) else { return }
let url = connectionOptions.urlContexts.first?.url
}
but I get url as nil here.
However if my app is in background mode and I hit URL then above method calls successfully and dependent functionality working fine. Following is my code on scene(_:openURLContexts:) method in sceneDelegate.
func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>){
let url = URLContexts.first?.url
let urlString: String = url!.absoluteString
if let urlComponents = URLComponents(string: urlString),let queryItems = urlComponents.queryItems {
queryParams = queryItems
} else {
print("invalid url")
}
guard let windowScene = (scene as? UIWindowScene) else { return }
self.window = UIWindow(windowScene: windowScene)
//self.window = UIWindow(frame: UIScreen.main.bounds)
let storyboard = UIStoryboard(name: "Main", bundle: nil)
guard let rootVC = storyboard.instantiateViewController(identifier: "LocationViewIdentifier") as? UIViewController else {
print("ViewController not found")
return
}
let rootNC = UINavigationController(rootViewController: rootVC)
self.window?.rootViewController = rootNC
self.window?.makeKeyAndVisible()
}
Can anyone tell me why first time above method does not call?

Answer 1

Maybe this will help your situation.
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
let urlinfo = connectionOptions.urlContexts
let url = urlinfo.first?.url as! NSURL
}
func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext*h>) {
let url = URLContexts.first!.url as NSURL
}
Update at 17.6.2021
If you wish to use Deeplink and Universal Link both this is my method.
//Deeplink or Universial Link Open when app is start.
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
// Universial link Open
if let userActivity = connectionOptions.userActivities.first,
userActivity.activityType == NSUserActivityTypeBrowsingWeb,
let urlinfo = userActivity.webpageURL{
print ("Universial Link Open at SceneDelegate on App Start ::::::: \(urlinfo)")
}
//deeplink Open
if connectionOptions.urlContexts.first?.url != nil {
let urlinfo = connectionOptions.urlContexts.first?.url
print ("Deeplink Open at SceneDelegate on App Start ::::::: \(String(describing: urlinfo))")
}
guard let _ = (scene as? UIWindowScene) else { return }
}
// Universial link Open when app is onPause
func scene(_ scene: UIScene, continue userActivity: NSUserActivity) {
if userActivity.activityType == NSUserActivityTypeBrowsingWeb,
let urlinfo = userActivity.webpageURL{
print ("Universial Link Open at SceneDelegate on App Pause ::::::: \(urlinfo)")
}
}
// Deeplink Open when app in onPause
func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
let urlinfo = URLContexts.first?.url
print ("Deeplink Open on SceneDelegate at App Pause :::::::: \(String(describing: urlinfo))")
}
Thanks

Answer 2

I had the same problem, and the method scene(_ scene:, continue userActivity:) was only called when the app is open.
When I checked the connectionOptions passed to the method scene(_ scene:, willConnectTo session, options connectionOptions:) it had a user activity with the expected URL. So, I ended up calling the first method manually:
func scene(_ scene: UIScene,
willConnectTo session: UISceneSession,
options connectionOptions: UIScene.ConnectionOptions) {
if let userActivity = connectionOptions.userActivities.first {
self.scene(scene, continue: userActivity)
}
}

Answer 3

I think the Apple docs explain it most clearly, i.e.,
If your app has opted into Scenes, and your app is not running, the system delivers the URL to the scene(_:willConnectTo:options:) delegate method after launch, and to scene(_:openURLContexts:) when your app opens a URL while running or suspended in memory.
Hence, it would only call your scene(_:openURLContexts:) (i.e., the one with this signature: func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) in the question) when your app opens a URL while running or suspended in memory only.
Instead, when the app is launched the first time, it calls scene(_:willConnectTo:options:).

Answer 4

My situation was that the openURL extra function provided in the SceneDelegate was not being called after returning from Facebook Authentication.
The solution was using
.onOpenURL { (url) in
ApplicationDelegate.shared.application(
UIApplication.shared,
open: url,
sourceApplication: nil,
annotation: [UIApplication.OpenURLOptionsKey.annotation]
)
}
To call the function in my extra application delegate, which then worked properly.