swift - 如何从 Firebase 获取特定数据

Question

[
  Beacons:[    
    Beacons1:[
        heritage:"Heritage Point1" 
        uuid:"qwerty"   
        ]   
    Beacons2:[
        heritage:"Heritage Point2"
        uuid:"asdfgh"
        ]
  ]

  Heritage Point1: [
          Title:"India"
          location:[
                lat:"11.345234"
                lon:"35.643521"
                ]
           Description:"Democratic Country"
  ]
]

这是 Firebase 模型!!!我有 uuid 我需要从特定的遗产点获取数据1从我的 Beacons Loop 看它是如何可能的..我只知道获取单个值。 这是我的代码!!

   'let rootRef = Database.database().reference()

    rootRef.child("Beacons").observe(.childAdded, with: {snapshot in

    guard let dictionary = snapshot.value as? [String: AnyObject] else { return }

   let uuidDatas = dictionary["uuid"] as? String

   let heritageDatas = dictionary["heritage"] as? String

        print("uuidData: \(uuidDatas ?? "")")
        print("HeritageData: \(heritageDatas ?? "")")

  })'

输出

uuidData: Optional("qwerty")
HeritageData: Heritage Point1
uuidData: Optional("asdfgh")
HeritageData: Heritage Point2

任何人请帮助我获取遗产点数据我正在使用 swift 4 语言

Answer 1

请先修正你的问题格式，因为它真的很难阅读和理解你试图在代码中做什么。

如果您想获取 Firebase 数据库中的特定项目，此示例可能对您有所帮助:

// somebody try this if we can have space in-between Heritage and point1
let myDatabaseRef = Database.database().reference(withPath: "Beacons/Heritage Point1")

myDatabaseRef.observe(.value) { (snap:DataSnapshot) in 

    // Do whatever you want with your snapshot here
    print(snap.value)
}

或者按照他们官方 YouTube 页面上的教程进行操作: https://www.youtube.com/watch?v=joVi3thZOqc&list=PLl-K7zZEsYLn-elkHPhDuuwdCZ93BXnrB&index=19