Async Next Screen Presentation in SwiftUI - ios

Question

i want to signup users when they click the signup button in my app. When the signup is complete and successfully created a user on the server side I want to present the next screen and only then.
In normal way I have a PresentationButton and set the destination and when somebody clicked the button the next screen is presented directly, but now it's async.
How to handle that?
Currently I have this PresentationButton:
PresentationButton(
Text(isSignIn ? "SignIn" : "Next").font(.headline).bold()
.frame(width: 100)
.padding(10)
.foregroundColor(.white)
.background(Color.blue)
.cornerRadius(20)
, destination: HomeScreen()
)
That's with the suggestion by Uro Arangino:
struct PasswordView : View {
#State private var password = ""
#State private var showNextScreen = false
var loginMode: LoginType
#ObjectBinding var signupManager = SignUpManager()
var body: some View {
VStack {
// if self.signupManager.showModal { self.showNextScreen.toggle() } <- Can't do this
TwitterNavigationView(backBtnOn: false)
middleView()
Spacer()
bottomView()
}
}
func bottomView() -> some View {
return VStack(alignment: .trailing) {
Divider()
BindedPresentationButton(
showModal: $showNextScreen,
label: getCustomText((Text("Registrieren"))),
destination: HomeTabView(),
onTrigger: {
let user = User(name: "rezo", username: "ja lol ey", profileDescription: "YAS", email: "dbjdb#dedde.de", telephoneNumber: nil, profileImage: UIImage(named: "twitter-logo")!, bannerImage: UIImage(systemName: "star")!)
self.signupManager.signIn(forUser: user, password: "ultraSecure", loginMode: .email)
// UserDefaults.standard.set(true, forKey: "loggedIn")
})
}.padding([.leading, .trailing]).padding(.top, 5).padding(.bottom, 10)
}
}
My bindable object class
final class SignUpManager: BindableObject {
let didChange = PassthroughSubject<SignUpManager, Never>()
var showModal: Bool = false {
didSet {
didChange.send(self)
}
}
func signIn(forUser user: User, password: String, loginMode: LoginType) {
if loginMode == .email {
LoginService.instance.signupWithEmail(user: user, andPassword: password, completion: handleCompletion)
} else {
LoginService.instance.login(withPhoneNumber: user.telephoneNumber!, completion: handleCompletion)
}
}
private func handleCompletion(_ status: Bool) {
if status {
showModal = true
}
}
}

Answer 1

You can use a presentation button with a binding.
See: https://stackoverflow.com/a/56547016/3716612
struct ContentView: View {
#State var showModal = false
var body: some View {
BindedPresentationButton(
showModal: $isSignIn,
label: Text(isSignIn ? "SignIn" : "Next")
.font(.headline)
.bold()
.frame(width: 100)
.padding(10)
.foregroundColor(.white)
.background(Color.blue)
.cornerRadius(20),
destination: HomeScreen()
)
}
}