如何从一个设置了 firebase 的 IOS 应用程序读取/写入另一个 firebase 项目中包含的另一个 firebase 数据库?斯威夫特 3 [英] How to read/write from one IOS App set up with firebase, to another firebase database contained in another firebase project? Swift 3
问题描述
我有一个使用 GoogleService-Info.plist 连接到我的 IOS 应用程序的 Firebase 数据库.在 AppDelegate 中，我配置了 App FIRApp.configure().我可以读/写数据.
I have a Firebase database connected to my IOS app with the GoogleService-Info.plist. In AppDelegate I configured the App FIRApp.configure(). I could read/write data.
现在，从这个 IOS 应用程序中，我想访问另一个 FireBase 数据库 brevCustomer.出于某种原因，来自 viewDidLoad 的 let dbRef 在 Xcode 中有一个标志，说这个不可变值 dbRef 从未使用过"并且应用程序在第一次崩溃在 fun startObserving() dbRef.observe(.value, with: { (snapshot: FIRDataSnapshot) in.
Now, from within this IOS app, I would like to access another FireBase Database brevCustomer. For some reason let dbRef from viewDidLoad has a flag in Xcode saying this 'immutable value dbRef was never used' and the app crashes on the first line in fun startObserving() dbRef.observe(.value, with: { (snapshot: FIRDataSnapshot) in.
谁能展示如何进行配置以便我可以读/写 brevCustomer 数据库?
Could anyone show how to do the configuration so that I can read/write to brevCustomer database?
编辑
请考虑以下场景:
我有两个 IOS 应用 Customer 和 Worker 以及两个名为 CustomerFireBase 和 WorkerFirebase 的 Firebase 项目我希望他们按以下方式工作.
I have two IOS apps Customer and Worker and two Firebase Projects named CustomerFireBase and WorkerFirebase and I would like them to work in the following way.
客户使用电子邮件和密码进行注册、登录、预订，并将数据保存在 CustomerFireBase 中.
Customer registers with email and password, logs in, makes a booking, and data is saved in CustomerFireBase.
- 从 CustomerFireBase 读取
- 写入 CustomerFireBase
- 写入 WorkerFirebase
我怎样才能做到这一点?基本上，我需要从一个以通常方式配置的 使用 Firebase，到另一个 Firebase 项目中包含的另一个 Firebase 数据库.
How can I achieve this? Basically, I need to get read/write access from one IOS app configured in the usual way with Firebase, to another Firebase Database contained in another Firebase project.
Class Claim { var dbRef:FIRDatabaseReference! //create a reference to Firebase database `brevCustomer`, not the one from .plist file override func viewDidLoad() { super.viewDidLoad() let app = FIRApp(named: "brevCustomer") let dbRef = FIRDatabase.database(app: app!).reference().child("Users") startObservingDB() // observe the database for value changes } func startObservingDB() { //it crashes on the line below dbRef.observe(.value, with: { (snapshot: FIRDataSnapshot) in //iterate over each user node child for user_child in snapshot.children { print(user_child)} }, withCancel: { (Error: Any) in print(Error) }) } // end of startObservingDB() }//end of Claim class class AppDelegate: UIResponder, UIApplicationDelegate { var window: UIWindow? func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool { // Use Firebase library to configure APIs for the initial project with .plist file saved in Xcode FIRApp.configure() /** 1. create a Firebase options object to hold the configuration data for the second Firebase Project */ let secondaryOptions = FIROptions(googleAppID: "1:82424687545:ios:71df5d45218ad27", bundleID: "com.vivvdaplar.Brev", gcmSenderID: "8201647545", apiKey: "AIzaSyCNtyUf2T3UunH6-ci_WyvOqCl_RzXI", clientID: "8200687545-42vklp94reavi6li6bolhcraoofc6.apps.googleusercontent.com", trackingID: nil, androidClientID: nil, databaseURL: "https://brev-72e10.firebaseio.com", storageBucket: "com.vivvdaplar.Brev", deepLinkURLScheme: nil) // Configure the app FIRApp.configure(withName: "brevCustomer", options: secondaryOptions!) return true } } //end of AppDelegate推荐答案
回复问题和评论.
如您所知，当用户注册 Firebase 时，会在 Firebase 服务器上创建一个用户帐户，并为用户提供一个用户 ID (uid).
As you know, when a user registers with Firebase, a user account is created on the Firebase server and the user is provided a user id (uid).
典型的设计模式是在 Firebase 中有一个/users 节点，用于存储有关用户的其他信息，例如昵称、地址或电话号码.
A typical design pattern is to have a /users node in Firebase that stores other information about the user, such as a nickname, address or phone number.
我们还可以利用/users 节点来指示它是哪种用户；Worker 或 Client，它们将与应用的其余部分和 Firebase 相关联，以便他们获得正确的数据.
We can leverage that /users node to also indicate what kind of user it is; Worker or Client, which would tie into the rest of the app and Firebase so they get to the correct data.
例如
users uid_0 nickname: "John" user_type: "Worker" uid_1 nickname: "Paul" user_type: "Client" uid_2 nickname: "George" user_type: "Worker" uid_3 nickname: "Ringo" user_type: "Worker"如您所见，John、George 和 Ringo 都是工人，而 Paul 是客户.
As you can see, John, George and Ringo are all workers and Paul is a client.
当用户登录时，Firebase signIn 函数将返回包含 uid 的用户身份验证数据.
When the user logs in, the Firebase signIn function will return the users auth data, which contains the uid.
Auth.auth().signIn(withEmail: "paul@harddaysnight.com", password: "dog", completion: { (auth, error) in if error != nil { let err = error?.localizedDescription print(err!) } else { print(auth!.uid) //with the uid, we now lookup their user type from the //users node, which tells the app if they are a client //or worker } })如果app数据是这样划分的
If the app data is divided like this
app client_data ... worker_data ...可以设置一个简单的规则来验证用户 user_type 是 worker_data 节点的 Worker 和 client_data 节点的 Client.这是一个伪示例，它将允许客户端用户仅访问 client_data 节点中的数据(概念)
A simple rule could be set up that verifies the users user_type is Worker for the worker_data node and Client for the client_data node. Here's a pseudo example that will allow a Client user to only access the data in the client_data node (conceptual)
rules client_data $user_id ".read": "auth != null && root.child(users) .child($user_id) .child("user_type") == 'Client'"这篇关于如何从一个设置了 firebase 的 IOS 应用程序读取/写入另一个 firebase 项目中包含的另一个 firebase 数据库?斯威夫特 3的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
