我所有的登录方法（如 fb 和 google 登录）都有协调器类并在 .sheet 上工作。 我试图从 this video 对这个视图做出同样的处理，但我被卡住了，根本找不到解决方案。我需要这个来从其他视图传递变量。
struct SignInWithAppleView: View {
@Environment (\.presentationMode) var presentationMode
@State var coordinator: signInWithAppleCoordinator?
var body: some View {
VStack {
SignInWithAppleButton()
.frame(height: 45)
.padding(.horizontal)
.onTapGesture {
self.coordinator = signInWithAppleCoordinator()
if let coordinator = self.coordinator {
coordinator.startSignInWithAppleFlow {
print("You successfuly signed in with apple")
self.presentationMode.wrappedValue.dismiss()
}
}
}
}
}
}
我的谷歌登录代码示例如下
import SwiftUI
import GoogleSignIn
import Firebase
struct GoogleAuthView: UIViewRepresentable {
@Binding var showAnimation: Bool
@Binding var showSheet: Bool
init(showAnimation: Binding<Bool>, showSheet: Binding<Bool>) {
self._showAnimation = showAnimation
self._showSheet = showSheet
}
func makeCoordinator() -> GoogleAuthView.Coordinator {
return GoogleAuthView.Coordinator(showAnimation: self.$showAnimation, showSheet: self.$showSheet)
}
class Coordinator: NSObject, GIDSignInDelegate {
@Binding var showAnimation: Bool
@Binding var showSheet: Bool
init(showAnimation: Binding<Bool>, showSheet: Binding<Bool>) {
self._showAnimation = showAnimation
self._showSheet = showSheet
}
func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!, withError error: Error?) {
if let error = error {
print(error.localizedDescription)
return
}
guard let authentication = user.authentication else {
return
}
self.showAnimation = true
self.showSheet = false
let credential = GoogleAuthProvider.credential(withIDToken: authentication.idToken,
accessToken: authentication.accessToken)
Auth.auth().signIn(with: credential) { (authResult, error) in
if let error = error, (error as NSError).code == AuthErrorCode.credentialAlreadyInUse.rawValue {
Auth.auth().signIn(with: credential) { result, error in
// continue
print("signIn result: " + authResult!.user.email!)
if let token = firebaseRegistrationPushToken {
checkUserAuthSettings(pushToken: token)
}
}
} else {
// continue
print("Facebook Sign In")
if let token = firebaseRegistrationPushToken {
checkUserAuthSettings(pushToken: token)
}
}
}
}
}
func makeUIView(context: UIViewRepresentableContext<GoogleAuthView>) -> GIDSignInButton {
let view = GIDSignInButton()
GIDSignIn.sharedInstance().delegate = context.coordinator
GIDSignIn.sharedInstance()?.presentingViewController = UIApplication.shared.windows.last?.rootViewController
return view
}
func updateUIView(_ uiView: GIDSignInButton, context: UIViewRepresentableContext<GoogleAuthView>) { }
}
苹果登录视频的完整代码
import Foundation
import SwiftUI
import AuthenticationServices
import CryptoKit
import Firebase
struct SignInWithAppleButton: UIViewRepresentable {
func makeUIView(context: Context) -> ASAuthorizationAppleIDButton {
return ASAuthorizationAppleIDButton(type: .signIn, style: .black)
}
func updateUIView(_ uiView: ASAuthorizationAppleIDButton, context: Context) {
}
}
class signInWithAppleCoordinator:NSObject, ASAuthorizationControllerPresentationContextProviding {
private var onSignedIn: (() -> Void)?
func presentationAnchor(for controller: ASAuthorizationController) -> ASPresentationAnchor {
return UIApplication.shared.windows.first!
}
// Unhashed nonce.
fileprivate var currentNonce: String?
@available(iOS 13, *)
func startSignInWithAppleFlow(onSignedIn:@escaping() ->Void ) {
self.onSignedIn = onSignedIn
let nonce = randomNonceString()
currentNonce = nonce
let appleIDProvider = ASAuthorizationAppleIDProvider()
let request = appleIDProvider.createRequest()
request.requestedScopes = [.fullName, .email]
request.nonce = sha256(nonce)
let authorizationController = ASAuthorizationController(authorizationRequests: [request])
authorizationController.delegate = self
authorizationController.presentationContextProvider = self
authorizationController.performRequests()
}
@available(iOS 13, *)
private func sha256(_ input: String) -> String {
let inputData = Data(input.utf8)
let hashedData = SHA256.hash(data: inputData)
let hashString = hashedData.compactMap {
return String(format: "%02x", $0)
}.joined()
return hashString
}
}
@available(iOS 13.0, *)
extension signInWithAppleCoordinator: ASAuthorizationControllerDelegate {
func authorizationController(controller: ASAuthorizationController, didCompleteWithAuthorization authorization: ASAuthorization) {
if let appleIDCredential = authorization.credential as? ASAuthorizationAppleIDCredential {
guard let nonce = currentNonce else {
fatalError("Invalid state: A login callback was received, but no login request was sent.")
}
guard let appleIDToken = appleIDCredential.identityToken else {
print("Unable to fetch identity token")
return
}
guard let idTokenString = String(data: appleIDToken, encoding: .utf8) else {
print("Unable to serialize token string from data: \(appleIDToken.debugDescription)")
return
}
// Initialize a Firebase credential.
let credential = OAuthProvider.credential(withProviderID: "apple.com",
idToken: idTokenString,
rawNonce: nonce)
Auth.auth().currentUser?.link(with: credential, completion: { (authresult, error) in
//фиксируем ошибку при заходе с разных поставщиков на тот же ящик
if let error = error, (error as NSError).code == AuthErrorCode.credentialAlreadyInUse.rawValue {
print("The user you're trying to sign in with has already been linked")
if let updatedCredential = (error as NSError).userInfo[AuthErrorUserInfoUpdatedCredentialKey] as? OAuthCredential {
print("Signing in with using updating credentials")
Auth.auth().signIn(with: updatedCredential) { (authResult, error) in
if let user = authResult?.user {
if let callback = self.onSignedIn {
callback()
}
}
}
}
}
else {
if let callback = self.onSignedIn {
callback()
}
}
})
}
}
func authorizationController(controller: ASAuthorizationController, didCompleteWithError error: Error) {
// Handle error.
print("Sign in with Apple errored: \(error)")
}
}
// Adapted from https://auth0.com/docs/api-auth/tutorials/nonce#generate-a-cryptographically-random-nonce
private func randomNonceString(length: Int = 32) -> String {
precondition(length > 0)
let charset: Array<Character> =
Array("0123456789ABCDEFGHIJKLMNOPQRSTUVXYZabcdefghijklmnopqrstuvwxyz-._")
var result = ""
var remainingLength = length
while remainingLength > 0 {
let randoms: [UInt8] = (0 ..< 16).map { _ in
var random: UInt8 = 0
let errorCode = SecRandomCopyBytes(kSecRandomDefault, 1, &random)
if errorCode != errSecSuccess {
fatalError("Unable to generate nonce. SecRandomCopyBytes failed with OSStatus \(errorCode)")
}
return random
}
randoms.forEach { random in
if remainingLength == 0 {
return
}
if random < charset.count {
result.append(charset[Int(random)])
remainingLength -= 1
}
}
}
return result
}
struct SignInWithAppleView: View {
@EnvironmentObject var session: SessionStore
@Environment (\.presentationMode) var presentationMode
@State var coordinator: signInWithAppleCoordinator?
var body: some View {
VStack {
SignInWithAppleButton()
.frame(height: 45)
.padding(.horizontal)
.onTapGesture {
self.coordinator = signInWithAppleCoordinator()
if let coordinator = self.coordinator {
coordinator.startSignInWithAppleFlow {
print("You successfuly signed in with apple")
self.presentationMode.wrappedValue.dismiss()
}
}
}
}
}
}