如何自定义 AWS Amplify iOS 身份验证警报？

Question

As someone new to iOS Swift development, I was wondering if someone could help me understand the proper way to customize client-side alert messages for authentication errors such as incorrect username and password. Below is the default alert message, which has the exception name as the title, which is not good user experience. How would I go about displaying an alert popup with another title and message?

Answer 1

I think you are looking for UIAlertController .

Swift sample :

let alert = UIAlertController(title: "Hello!", message: "Message", preferredStyle: UIAlertController.Style.alert)
let alertAction = UIAlertAction(title: "OK!", style: UIAlertAction.Style.default)
        {
            (UIAlertAction) -> Void in
        }
        alert.addAction(alertAction)
        present(alert, animated: true)
        {
            () -> Void in
        }

Hope it helps!

Answer 2

Handle your error response to define custom title & message like below.

import AWSCognitoIdentityProvider

extension Error {
    var customizedDescription: String {
        let nsError = self as NSError
        if nsError.domain == AWSCognitoIdentityProviderErrorDomain, let code = AWSCognitoIdentityProviderErrorType(rawValue: nsError.code) {
            switch code {
            case .expiredCode: return "Verification code has expired. Please try again"
            case .codeMismatch: return  "Incorrect verification code. Please enter the correct code to continue."
            case .notAuthorized: return "Authentication failed. Please enter the correct credentials to continue."
            case .usernameExists: return "Username already exists."
            case .invalidPassword: return "Invalid password. Please try again."
            case .userNotConfirmed: return "User not confirmed. Please verify your account."
            default: return nsError.userInfo["message"] as? String ?? "AWS cognito failed with error code: \(nsError.code)"
            }
        }
        return localizedDescription
    }
}

https://gist.github.com/Catherine-K-George/11a94271bd0cff282e019cd2613d089b