How to show a SwiftUI View programmatically without a button

Question

I have a problem right now: What I want: The first time the app starts my already existing view should be presented. I already implemented something in the AppDelegate that checks if the app launched for the first time. And if thats the case another view should be presented. Is there a method to do this directly in the AppDelegate like it was possible with Storyboards?

Thank you in advance.

Gil Birman · Accepted Answer · 2019-12-09 19:18:22Z

1

In your AppDelegate you have a hosting controller that bootstraps the main SwiftUI view. So one way to achieve this is to conditionally set the rootView.

UIHostingController(rootView: isFirstTime ? FirstTimeView() : ContentView())

answered Dec 9, 2019 at 19:18

Gil Birman

36k15 gold badges78 silver badges124 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Procrastin8 · Accepted Answer · 2019-12-10 09:15:48Z

1

I would create an initial RootView that merely switches between content and provides an EnvironmentValues that's passed to it.

struct RootView: View {
  @Environment(\.isInitialLaunch) var isInitialLaunch: Bool

  var body: some View {
    Group {
      if isInitialLaunch {
        FirstTimeView()
      } else {
        ContentView()
      }
  }
}

Then, in SceneDelegate:

self.window?.rootViewController = UIHostingController(rootView: RootView().environment(\.isInitialLaunch, isInitialLaunch))

Or, make isInitialLaunch a @State (or @Binding, @ObservedObject, etc.) variable. This way, after your onboarding process, if you change it to false, SwiftUI will actually automatically animate users to the ContentView.

answered Dec 10, 2019 at 9:15

Procrastin8

4,5831 gold badge15 silver badges26 bronze badges

Collectives™ on Stack Overflow

How to show a SwiftUI View programmatically without a button

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related