The document discusses URL routing in a SwiftUI app. It explains that URL routing can now be handled in the SceneDelegate using the scene(_:openURLContexts:) method rather than the AppDelegate. It provides an example of parsing the URL and programmatically navigating to the destination view controller. It also discusses using the NavigatorInsertionView to programmatically push views onto the navigation stack.

1. For Developing URL Routing of SwiftUI App
freddi - LINE Fukuoka
at potatotips (27th April,2020)

2. Goal of This Presentation
- SwiftUI(SceneDelegate) URL Routing
- URL Routing
- iOS12

3. URL Routing
- URL
https://snews.app/alerm
snews://alerm

4. URL Routing
-
- SceneDelegate URL ( )
- Routing
-

5. Parse URL in AppDelegate (Old way)
- AppDelegate application(_:, open:, options:)
- URL
// application(_:, open:, options:) -> Bool
func application(_ app: UIApplication, open url: URL, ...) -> Bool {
// Write down URL Parsing Procedure ...
return true
}

6. Parse URL in SceneDelegate
// scene(_:, openURLContexts:)
func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
// Write down URL Parsing Procedure ...
}
New
- SceneDelegate scene(_:, openURLContexts:)
- AppDelegate Deprecated
※ SceneDelegate

7. URL Routing
-
- SceneDelegate URL
- Routing
-

8. Route to Goal Screen from Current Screen
- UIApplication.keyWindow Deprecated

9. Route to Goal Screen from Current Screen
- SceneDelegate.window
import UIKit
import SwiftUI
class SceneDelegate: UIResponder, UIWindowSceneDelegate {
var window: UIWindow?
…
New

10. Route to Goal Screen from Current Screen
- UIWindow SwiftUI View
- … ViewController ?

11. Route to Goal Screen from Current Screen
- UIWindow SwiftUI View
- … ViewController ?
SwiftUI .sheet ViewController present

12. Route to Goal Screen from Current Screen
- UIWindow SwiftUI View
- … ViewController ?
UIWindow
UIHostingController(VC)
SwiftUI .sheet ViewController presentSwiftUI

13. Route to Goal Screen from Current Screen
- UIWindow SwiftUI View
- … ViewController ?
UIWindow
SwiftUI .sheet ViewController present
.sheet
.presentUIHostingController(VC)
SwiftUI
UIHostingController(VC)
SwiftUI

14. Route to Goal Screen from Current Screen
func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
let url = URLContexts.first?.url
let distinationView = parseURLToDistination(url: url)
var currentTopVC = window?.rootViewController
while true {
if let presentedVC = currentTopVC?.presentedViewController {
currentTopVC = presentedVC
} else {
break
}
}
currentTopVC?.present(UIHostingController(rootView: distinationView), …
}

15. Route to Goal Screen from Current Screen
func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
let url = URLContexts.first?.url
let distinationView = parseURLToDistination(url: url)
var currentTopVC = window?.rootViewController
while true {
if let presentedVC = currentTopVC?.presentedViewController {
currentTopVC = presentedVC
} else {
break
}
}
currentTopVC?.present(UIHostingController(rootView: distinationView), …
}
url
url View
VC
UIHostingController View
VC

16. URL Routing
-
- SceneDelegate URL
- Routing
-

17. Other Tips
- Navigation Coordinator
- sheet NavigationLink tag
- Navigation View push
- pushViewController
- Navigation UINavigationController
- NavigatorInsertionView( )

18. NavigatorInsertionView
struct NavigatorInsertionView: View {
static var contentView: AnyView? = nil
var body: some View { NavigatorInsertionView.contentView ??
{ () -> AnyView in
assertionFailure("Could not get AnyView")
return AnyView(EmptyView())
}()
}
}

19. NavigatorInsertionView
struct NavigatorInsertionView: View
NavigationLink("", destination: NavigatiorInsertionView(),
tag: Coordinator.MovingState.on,
selection: movingState)
.frame(width: 0, height: 0, alignment: .bottom)

20. Conclusion of URL Routing of SwiftUI App
- iOS13
- Coodinator
- SceneDelegate scene(_ scene:, openURLContexts:)
- Navigation VC present

22. https://hakata-swift.connpass.com/event/168308/