如何使用 AWS Amplify SDK 记住设备？

Question

我已经使用 AWS Amplify 实现了注册/登录功能，并使用我自己的 View 控制器而不是 Drop-in auth 快速实现。一旦我退出应用程序并重新启动它，问题就开始了。完成此操作后，用户不再登录。我已将记住设备设置为始终在用户池设置中。 有人遇到过这个问题吗？ 这是我的功能，用户得到确认，除了记住用户之外一切正常

    @objc func confirm(){
        print("confirm pressed")
        guard let verificationCode = verificationTextField.text else{
            return
        }
        AWSMobileClient.default().confirmSignUp(username: username, confirmationCode: verificationCode) { (signUpResult, error) in

            if let signUpResult = signUpResult{
                switch(signUpResult.signUpConfirmationState){
                case .confirmed:
                    AWSMobileClient.default().deviceOperations.updateStatus(remembered: true) { (result, error) in //This is where I try to save the users device
                        print("User is signed up and confirmed")
                        DispatchQueue.main.async {
                            let signedInTabBar = SignedInTabBarController()
                            self.view.window!.rootViewController = signedInTabBar
                        }
                    }
                case .unconfirmed:
                    print("User is not confirmed and needs verification via \(signUpResult.codeDeliveryDetails!.deliveryMedium) sent at \(signUpResult.codeDeliveryDetails!.destination!)")
                case.unknown:
                    print("Unexpected case")
                }
            }else if let error = error {
                print("\(error.localizedDescription)")
            }
        }

    }

Answer 1

据我所知，您需要检查用户是否登录。为此，您需要在应用程序的开头或检查用户状态的任何位置添加此代码：

AWSMobileClient.default().initialize { userState, error in
    OperationQueue.main.addOperation {
        if let error = error {
             AWSMobileClient.default().signOut()
            assertionFailure("Logic after init error: \(error.localizedDescription)")
        }

        guard let userState = userState else {
             AWSMobileClient.default().signOut()
             return
        }

        guard userState == .signedIn else {
            return
        }
    }
}