CODEWITHSUNDEEP
iosviewswiftui
Lukas Schmitt
Lukas Schmitt

Reputation: 41

How to show a SwiftUI View programmatically without a button

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.

Upvotes: 4

Views: 293

Answers (2)

Procrastin8
Procrastin8

Reputation: 4503

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.

Upvotes: 1

Gil Birman
Gil Birman

Reputation: 35900

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())

Upvotes: 1

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