Question

请有人告诉我如何将快照键值以及我已经附加到我的数组中的子值包括在内（忘记包含它，现在记住我必须）...除了那些我真的不能＆＃ 39;当我尝试解决自己的问题时，通过使用此方法首先测试值来理解：print(rooms.popFirst().key!)我的数据库值的一半得到nil值？!!如果我没有包含这种方法，那么一切都可以正常工作，如果你无法想象，尽管如此我真的希望你的建议或建议能够获得具有自己关键价值的所有数据...... 到目前为止，这是我的代码：

Database.database().reference().child("rooms").observe(.value, with: { (snapshot) in
        print()

        var rooms = snapshot.value as! [String:AnyObject]

        for(_,value) in rooms  {

            if (rooms.popFirst()?.key) != nil{

                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: "XXX",title: title!, description: description!, roomPicutreURL: roomPictureUrl!, longitude: longitude!, latitude: latitude!, dateFrom: dateFrom!, dateTo: dateTo!, owner: owner!)

                //print(rooms.popFirst()?.key)
                self.rooms.append(myRooms)
                self.tableView.reloadData()



            }
        }
    })

Answer 1

试试这个：

Database.database().reference().child("rooms").observe(.value, with: { (snapshot) in

    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: "XXX",title: title!, description: description!, roomPicutreURL: roomPictureUrl!, longitude: longitude!, latitude: latitude!, dateFrom: dateFrom!, dateTo: dateTo!, owner: owner!)

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



        }
    }
})

Answer 2

要从快照中获取密钥，您可以使用以下代码行，它会为您提供-> Kqwewsds12 -> your child Details

等结果

let dictValues = [String](snapshot.keys)

            print(dictValues[0]) //Output -- Kqwewsds12

如何包含firebase快照键值？ [迅速]

2 个答案: