Custom URL opening app, but not passing information

Question

Created Oct ’19

Replies 2

Boosts 2

Views 4.9k

Participants 6

Has anyone else run into an error where a custom URI such as "myapp://test" will open the app with a urlscheme "myapp" but won't pick up the "test" portion of the URI? The code I am using below is in the AppDelegate.swift file:

func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
        @Binding var _: String = url.absoluteString
        print(url.absoluteString)
        Controller.message = url.absoluteString
        return true
    }

The Controller is a struct with a static var "message" that I am using in a View. Nothing is printed out when I pass "myapp://test", but the app opens even if it is close.

This does work, however, if I place this code in the SceneDelegate:

func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
        if let url = URLContexts.first?.url{
            @Binding var _: String = url.absoluteString
            print(url.absoluteString)
            Controller.message = url.absoluteString
            print(Controller.message)
        }
    }

This will print the correct URI, but if I try to use this URI when the app is closed out it will open, but no information will be passed.

Is this a Swift 5.1 problem? Every tutorial/video I have found online uses the first code snippet in the AppDelegate file and I have triple checked to make sure it is the same. Everything is the same from the tutorials, but I'm still not getting any results.

Thanks.

Matt

Boost

Answer 1

jo.on OP

Dec ’20

For future stumblers:

When the app is killed and opened by a custom URI, it doesn't trigger func scene(_:openURLContexts:) but by the normal startup function func scene(_:willConnectTo:options) where connectionOptions contains your urlContexts.

Code Block Swiftfunc scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
    let myRootController = Controller()
    
    window.rootViewController = myRootController
    self.window = window
    window.makeKeyAndVisible()
    self.handle(urlContexts)
}
func scene(_ scene: UIScene, openURLContexts urlContexts: Set<UIOpenURLContext>) {
    self.handle(connectionOptions.urlContexts)
}
private func handle(_ urlContexts: Set<UIOpenURLContext>) {
    if let url = urlContexts.first?.url{
        @Binding var _: String = url.absoluteString
        print(url.absoluteString)
        Controller.message = url.absoluteString
        print(Controller.message)
	}
}

4

Answer 2

zak_ray OP

Jul ’22

If I'm not mistaken, the two calls to handle() are reversed-- willConnectTo should have the one with connectionOptions.urlContexts and openURLContexts should have just urlContexts. Otherwise, this solved it for me.

0