In my application I start with a LoginView which makes an API call to the backend for authentication. In case this is successfull (in a completion handler, i want to show the FeedView(). With UIKit this is all pretty simple trying to figure out how to do this with SwiftUI. So How can I show a new View programmatically (I don't have a NavigationView)?

CodePudding user response：

You can have a conditional view like so:

struct MakeSureUserIsLoggedInView: View {
  @State private var loggedIn = false
  var body: some View {
    if loggedIn {
      FeedView()
    } else {
      LoginView { // your login view with completion handler
        loggedIn = true
      }
    }
  }
}

Notice how we use @State to switch between what view is shown.

CodePudding user response：

If you don't want to use a NavigationView, you have several options:

1. A SwiftUI-native style would be simply to have a parent view which holds your view, and other views. You can have a property on a shared ViewModel and the parent view can return a different child view depending on the value of the view model

2. Displaying a new view modally (this is easiest)

3. Using UIKit navigation - this is my preferred method in complex apps where you can simply navigate around the app using UIViewControllers, with a SwiftUI view pinned to the edges

I can go into more detail on any of these, with some sample code from my own projects, if you would like. Option 1 is probably the most natural for SwiftUI and you can even animate the transitions pretty nicely with things like matchedGeometryView if you use this option.