尝试在 SwiftUI 中的服务器响应后推送新视图

Question

我想在使用Firebase成功登录后显示我的新视图，我的注册和恢复密码已经起作用，因为我将其显示为工作表，但在这个视图中，我想显示一个新视图，我已经尝试过使用NavigationLink，onReceive，但我无法完成这项工作。

struct LoginView: View {
@ObservedObject var viewModel = ViewModel()
@State private var formOffset: CGFloat = 0
@State private var presentSignUpSheet = false
@State private var presentPasswordRecoverySheet = false
@State private var presentLobbySheet = false
var body: some View {
VStack {
HeaderView(title: Constants.appName)
Spacer()
Divider()
Group {
BodyView(value: viewModel).viewSelection(view: Constants.QuestionnaireView.signIn.rawValue)
LCButton(text: Constants.login) {
self.viewModel.signIn()
}.alert(isPresented: $viewModel.thereIsAnError) {
Alert(title: Text(Constants.alert), message: Text(viewModel.errorMessage), dismissButton: .default(Text(Constants.ok)))
}
Button(action: {
self.presentSignUpSheet.toggle()
}) {
Text(Constants.signUp)
}.sheet(isPresented: $presentSignUpSheet) {
SignUpView()
}.padding()
Button(action: {
self.presentPasswordRecoverySheet.toggle()
}) {
Text(Constants.forgotPassword)
}.sheet(isPresented: $presentPasswordRecoverySheet) {
RecoverPasswordView()
}.padding()
}

}.edgesIgnoringSafeArea(.top)
.padding()
.offset(y: self.formOffset)
}
}
class ViewModel: ObservableObject {
@Published var user = User()
@Published var confirmPassword = ""
@Published var thereIsAnError = false
@Published var errorMessage = ""
var viewDismissalModePublisher = PassthroughSubject<Bool, Never>()
var onSuccessLogin = PassthroughSubject<Bool, Never>()
private var shouldPopView = false {
didSet {
viewDismissalModePublisher.send(shouldPopView)
}
}
private var shouldShowLobbyView = false {
didSet {
onSuccessLogin.send(shouldShowLobbyView)
}
}
func registerSuccess() {
self.user.email = ""
self.user.password = ""
self.confirmPassword = ""
DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
self.shouldPopView = true
}
}
func signUpProcess() {
if user.password != confirmPassword {
errorMessage = Constants.passConfirmWrong
thereIsAnError.toggle()
} else {
signUp()
}
}
func signUp() {
Auth.auth().createUser(withEmail: user.email, password: user.password) { (result, error) in
if error != nil {
self.errorMessage = error!.localizedDescription
self.thereIsAnError.toggle()
} else {
self.registerSuccess()
}
}
}
func signIn() {
Auth.auth().signIn(withEmail: user.email, password: user.password) { (result, error) in
if error != nil {
self.errorMessage = error!.localizedDescription
self.thereIsAnError.toggle()
} else {
self.shouldShowLobbyView.toggle()
self.user.email = ""
self.user.password = ""
}
}
}
func recoverPassword() {
Auth.auth().sendPasswordReset(withEmail: user.email) { (error) in
if error != nil {
self.errorMessage = error!.localizedDescription
self.thereIsAnError.toggle()
}  else {
self.user.email = ""
DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
self.shouldPopView = true
}
}
}
}
}

Answer 1

我遇到了类似的问题，我找到了模仿一些导航的解决方案

我打算在这里写基础知识，但没有什么比发布带有解释的源代码更好的了。

视图路由器教程

这包括作为环境对象的可观察对象，它允许您全屏显示视图，而不是工作表。

在您的情况下，您将有一个LoginView，在此视图中，您可以打开"注册"和"恢复密码"视图的工作表，并以全屏视图打开LobbyView，就像在UIKit中使用present方法一样