使用iCloud身份验证方法验证用户是否在我的应用程序中拥有帐户

Question

I have just read an article where it was explained how to get the token from iCloud in order to execute authentication with the iOS platform.

How can we combine Android and iOS with such an approach?

How Android will know that user has iOS account?

Which kind of credentials do I need to ask users to verify if they already have an account on the iOS platform?

Answer 1

Aleksey,

This code, confirms somebody is logged into iCloud by trying to access an iCloudKit container. The first method checks and sends a notification if it if it fails, the second method trigger by said failure shunts the user to the control panel so they can sign into iCloud.

 func isAuthorized4Cloud() {
    container = CKContainer(identifier: "iCloud.X")
    publicDB = container.publicCloudDatabase
    privateDB = container.privateCloudDatabase
    var userID: CKRecordID!
    container.fetchUserRecordID( completionHandler: { recordID, error in
        if error == nil {
            userID = recordID
            print("files_setup userID \(userID.recordName)")
            NotificationCenter.default.post(name: Notification.Name("cloudConnected"), object: nil, userInfo: nil)
        } else {
            NotificationCenter.default.post(name: Notification.Name("noCloud"), object: nil, userInfo: nil)
            print("files_setup \(error?.localizedDescription)")
        }
    })
}

In your view Controller...

  NotificationCenter.default.addObserver(self, selector: #selector(noCloud), name: Notification.Name("noCloud"), object: nil)

  func noCloud(notification:NSNotification) {
    DispatchQueue.main.async {
        self.navigation.isHidden = true
        let alert = UIAlertController(title: "Stop", message: "Sorry, you need to log into iCloud ...", preferredStyle: UIAlertControllerStyle.alert)
        let settingsAction = UIAlertAction(title: "Settings", style: .default) { (_) -> Void in
            guard let settingsUrl = URL(string: UIApplicationOpenSettingsURLString) else {
                return
            }

            if UIApplication.shared.canOpenURL(settingsUrl) {
                UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
                    print("Settings opened: \(success)") // Prints true
                })
            }
        }
        alert.addAction(settingsAction)
        let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
        alert.addAction(cancelAction)
        self.present(alert, animated: true, completion: nil)
    }
}