我目前正在将AWS Mobile Hub用于使用Cognito和Cloud Logic的iOS应用程序。
我决定替换默认的AuthUIViewController，因为我不喜欢它的外观。我使用此示例项目来帮助我通过用户池https://github.com/awslabs/aws-sdk-ios-samples/tree/master/CognitoYourUserPools-Sample/Swift进行注册。
这是我的实现方式：
从AppDelegate开始，我将要登录的UserPool设置为通常可访问的常数变量。我必须知道为什么AWSMobileClient不认为我的用户已登录的一个想法是，因为它定义了自己的服务配置/池，但是我不确定：
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
AWSDDLog.add(AWSDDTTYLogger.sharedInstance)
AWSDDLog.sharedInstance.logLevel = .verbose
// setup service configuration
let serviceConfiguration = AWSServiceConfiguration(region: Constants.AWS.CognitoIdentityUserPoolRegion, credentialsProvider: nil)
// create pool configuration
let poolConfiguration = AWSCognitoIdentityUserPoolConfiguration(clientId: Constants.AWS.CognitoIdentityUserPoolAppClientId,
clientSecret: Constants.AWS.CognitoIdentityUserPoolAppClientSecret,
poolId: Constants.AWS.CognitoIdentityUserPoolId)
// initialize user pool client
AWSCognitoIdentityUserPool.register(with: serviceConfiguration, userPoolConfiguration: poolConfiguration, forKey: AWSCognitoUserPoolsSignInProviderKey)
// fetch the user pool client we initialized in above step
Constants.AWS.pool = AWSCognitoIdentityUserPool(forKey: AWSCognitoUserPoolsSignInProviderKey)
return AWSMobileClient.sharedInstance().interceptApplication(
application, didFinishLaunchingWithOptions:
launchOptions)
}
AppDelegate完成后，应用程序转到其名为InitialViewController的根视图控制器。在这里，我允许用户单击Facebook登录或常规（用户池）登录。
class InitialViewController:UIViewController {
@objc func regLogin() {
//Set a shared constants variable "user" to the current user
if (Constants.AWS.user == nil) {
Constants.AWS.user = Constants.AWS.pool?.currentUser()
}
Constants.AWS.pool?.delegate = self
//This function calls the delegate function startPasswordAuthentication() in the extension below to initiate login
Constants.AWS.user?.getDetails().continueOnSuccessWith { (task) -> AnyObject? in
DispatchQueue.main.async(execute: {
//called after details for user are successfully retrieved after login
print(AWSSignInManager.sharedInstance().isLoggedIn)// false
print(AWSSignInManager.init().isLoggedIn)// false
print(AWSCognitoUserPoolsSignInProvider.init().isLoggedIn())// false
print(Constants.AWS.user?.isSignedIn) // true
AppDelegate.del().signIn()
})
return nil
}
}
}
extension InitialViewController: AWSCognitoIdentityInteractiveAuthenticationDelegate {
func startPasswordAuthentication() -> AWSCognitoIdentityPasswordAuthentication {
self.present(loginVC, animated: true, completion: nil)
return self.loginVC
}
}
如您所见，这些功能完成了工作，并且根据（Constants.AWS.user？.isSignedIn）成功登录了用户，并且事实证明我可以成功检索用户详细信息。但是，当我询问AWSSignInManager或UserPoolsSignInProvider是否我的用户已登录时，它返回false。这是一个问题，因为如果没有AWSMobileHub看到我的用户已登录，我将无法访问我的Cloud Logic功能等。
有人可以帮助我阐明如何通知MobileHub和登录管理器我的用户已登录到用户池中，以便我的应用程序可以正常工作吗？
谢谢！
答案 0 :(得分：1)
Jonathan的答案是一个很好的起点，但是它要求将AWSAuthUI包含到您的项目中。
更好的解决方案是直接在AWSUserPoolsUIOperations.m中实现功能。特别是，按下登录按钮时触发的功能应如下所示：
@IBAction func signInPressed(_ sender: AnyObject) {
if (self.usernameTextField.text != nil && self.passwordTextField.text != nil) {
self.userName = self.usernameTextField.text!
self.password = self.passwordTextField.text!
AWSCognitoUserPoolsSignInProvider.sharedInstance().setInteractiveAuthDelegate(self)
AWSSignInManager.sharedInstance().login(
signInProviderKey: AWSCognitoUserPoolsSignInProvider.sharedInstance().identityProviderName,
completionHandler: { (provider: Any?, error: Error?) in
print(AWSSignInManager.sharedInstance().isLoggedIn)
})
} else {
let alertController = UIAlertController(title: "Missing information",
message: "Please enter a valid user name and password",
preferredStyle: .alert)
let retryAction = UIAlertAction(title: "Retry", style: .default, handler: nil)
alertController.addAction(retryAction)
}
}
然后包括以下功能，作为SignIn视图控制器的扩展：
public func handleUserPoolSignInFlowStart() {
let authDetails = AWSCognitoIdentityPasswordAuthenticationDetails(username: self.userName!, password: self.password!)
self.passwordAuthenticationCompletion?.set(result: authDetails)
}
public func startPasswordAuthentication() -> AWSCognitoIdentityPasswordAuthentication {
return self
}
public func getDetails(_ authenticationInput: AWSCognitoIdentityPasswordAuthenticationInput, passwordAuthenticationCompletionSource: AWSTaskCompletionSource<AWSCognitoIdentityPasswordAuthenticationDetails>) {
self.passwordAuthenticationCompletion = passwordAuthenticationCompletionSource
}
public func didCompleteStepWithError(_ error: Error?) {
DispatchQueue.main.async {
if let error = error as NSError? {
let alertController = UIAlertController(title: error.userInfo["__type"] as? String,
message: error.userInfo["message"] as? String,
preferredStyle: .alert)
let retryAction = UIAlertAction(title: "Retry", style: .default, handler: nil)
alertController.addAction(retryAction)
self.present(alertController, animated: true, completion: nil)
} else {
self.usernameTextField.text = nil
self.dismiss(animated: true, completion: nil)
}
}
}
答案 1 :(得分：0)
在深入研究了AWS代码之后，我在AWSSignInViewController.m（用于移动中心/认知的默认身份验证过程中使用的视图控制器）的pod AWSAuthUI中找到了答案。
代码是：
- (void)handleUserPoolSignIn {
Class awsUserPoolsUIOperations = NSClassFromString(USERPOOLS_UI_OPERATIONS);
AWSUserPoolsUIOperations *userPoolsOperations = [[awsUserPoolsUIOperations alloc] initWithAuthUIConfiguration:self.config];
[userPoolsOperations loginWithUserName:[self.tableDelegate getValueForCell:self.userNameRow forTableView:self.tableView]
password:[self.tableDelegate getValueForCell:self.passwordRow forTableView:self.tableView]
navigationController:self.navigationController
completionHandler:self.completionHandler];
}
然后在Swift中进入重要的部分！
userPoolsOperations.login(withUserName: "foo", password: "bar", navigationController: self.navigationController!, completionHandler: { (provider: Any?, error: Error?) in
print(AWSSignInManager.sharedInstance().isLoggedIn) // true
print(AWSSignInManager.init().isLoggedIn) // false
print(AWSCognitoUserPoolsSignInProvider.init().isLoggedIn()) // false
print(Constants.AWS.user?.isSignedIn) // nil
})
}
经验教训：即使很糟糕，通读AWS的代码也是有帮助的