Apple ID授权登入

要在SwiftUI应用中实现Apple ID授权登录，您可以按照以下步骤操作：

1. 在Apple开发者账号中为您的应用程序配置Sign in with Apple认证信息。
2. 在Xcode中创建一个SwiftUI项目。
3. 导入AuthenticationServices框架。
4. 创建一个View来显示Apple ID登录按钮，并处理登录成功或失败的情况。

下面是一个简单的示例代码，演示如何在SwiftUI应用中实现Apple ID授权登录：

import SwiftUI
import AuthenticationServices

struct ContentView: View {
    var body: some View {
        VStack {
            Text("Welcome to MyApp")
            
            SignInWithAppleButton()
                .frame(width: 200, height: 50)
                .onTapGesture {
                    performSignInWithApple()
                }
        }
    }
    
    func performSignInWithApple() {
        let request = ASAuthorizationAppleIDProvider().createRequest()
        request.requestedScopes = [.fullName, .email]
        
        let authorizationController = ASAuthorizationController(authorizationRequests: [request])
        authorizationController.delegate = self
        authorizationController.presentationContextProvider = self
        authorizationController.performRequests()
    }
}

extension ContentView: ASAuthorizationControllerDelegate {
    func authorizationController(controller: ASAuthorizationController, didCompleteWithAuthorization authorization: ASAuthorization) {
        // 处理成功登录的情况
        if let appleIDCredential = authorization.credential as? ASAuthorizationAppleIDCredential {
            // 使用appleIDCredential.user和appleIDCredential.email等信息进行后续操作
        }
    }
    
    func authorizationController(controller: ASAuthorizationController, didCompleteWithError error: Error) {
        // 处理登录失败的情况
        print("Error: \(error.localizedDescription)")
    }
}

extension ContentView: ASAuthorizationControllerPresentationContextProviding {
    func presentationAnchor(for controller: ASAuthorizationController) -> ASPresentationAnchor {
        return UIApplication.shared.windows.first!
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}