ios - swift 3 firebase 快照如果值等于...获取

Question

我正在尝试检查房间的值“所有者”是否等于当前用户 ID，如果是，则获取包括键值在内的所有数据并继续检查“房间”的其他 child

我一直在尝试，但我没有找到解决方案，尽管它看起来很简单，所以请帮助我提供您的建议或想法。到目前为止我的代码:

          Database.database().reference().child("rooms").queryOrdered(byChild: "Owner").observeSingleEvent(of: .value, with: { (snapshot) in

      let currentUser = Auth.auth().currentUser?.uid

        if !snapshot.exists() {
            print("No data found")
            return
        }

        var rooms = snapshot.value as! [String:AnyObject]
        let roomKeys = Array(rooms.keys)

        for roomKey in roomKeys  {

            guard

                let value = rooms[roomKey] as? [String:AnyObject]

                else
            {
                continue
            }

            let title = value["title"] as? String
            let description = value["description"] as? String
            let roomPictureUrl = value["Room Picture"] as? String
            let longitude = value["Longtitude"] as? String
            let latitude = value["Latitude"] as? String
            let dateFrom = value["Date From"] as? String
            let dateTo = value["Date To"] as? String
            let owner = value["Owner"] as? String

            let myRooms = Room(roomID: roomKey,title: title!, description: description!, roomPicutreURL: roomPictureUrl!, longitude: longitude!, latitude: latitude!, dateFrom: dateFrom!, dateTo: dateTo!, owner: owner!)

            self.rooms.append(myRooms)
            self.tableView.reloadData()

            print(snapshot.value)

        }
    })

Answer 1

您缺少查询中的值:

Database.database().reference()
  .child("rooms")
  .queryOrdered(byChild: "Owner")
  .queryEqual(toValue: "STbz...")
  .observeSingleEvent(of: .value, with: { (snapshot) in

有关此和更多查询运算符，请参阅 documentation on filtering data .