使用数组中的所有值执行任务(Swift、Firebase)

import Foundation
import Firebase

// 初始化Firebase
FirebaseApp.configure()

// 假设我们有一个用户ID数组
let userIds = ["user1", "user2", "user3"]

// 获取Firebase实时数据库引用
let database = Database.database().reference()

// 遍历用户ID数组并获取用户信息
for userId in userIds {
    let userRef = database.child("users").child(userId)
    
    userRef.observeSingleEvent(of: .value, with: { snapshot in
        if let userDict = snapshot.value as? [String: AnyObject], let user = User(dictionary: userDict) {
            print("User: \(user)")
        }
    }) { error in
        print("Error fetching user: \(error.localizedDescription)")
    }
}

// 用户模型
class User {
    var id: String
    var name: String
    var email: String
    
    init(dictionary: [String: AnyObject]) {
        self.id = dictionary["id"] as! String
        self.name = dictionary["name"] as! String
        self.email = dictionary["email"] as! String
    }
}

{
  "rules": {
    "users": {
      "$uid": {
        ".read": "$uid === auth.uid",
        ".write": "$uid === auth.uid"
      }
    }
  }
}

if userIds.indices.contains(index) {
    let userId = userIds[index]
    // 继续处理
} else {
    print("Index out of range")
}