Question

我希望将所有ChilDBYAutoID中的每个图表项都收到一个双数组。
此外，有没有更好的方法来计数，所以没有自动ID？例如：

0 724 1 744 2 745 3 800 。。

我的主要目标是上传许多图表值，而不只是更新一个。然后将图形值检索为双数组。

func uploadToFirebase(){

   //Firebase Initialization
    var ref: FIRDatabaseReference!
    ref = FIRDatabase.database().reference()

    ref.child("general_room_index").childByAutoId().setValue(["graph_value": totalCountY])

}

databaseRef.child("general_room_index").observeSingleEventOfType(.Value, withBlock: { (snapshot) in

  snapshot.value!["medals"] as! [Double]

    })

Answer 1

据我了解你的问题，你必须将你的JSON结构改为： -

genera_Room_Index_Count : 3,

genera_Room_Index : {
       1 : 123,
       2 : 321, 
       3 : 565
          }

将您的genera_Room_Index_Count初始化为0;相同的安全规则适用于genera_Room_Index_Count节点;然后开始附加值

 func uploadToFirebase(your_Value : Int){   // your_Value is your graph value as parameter

   FIRDatabase.database().reference().child("genera_Room_Index_Count").observeSingleEvent(of: .value, with: {(Counts) in

        let count = Counts.value as! Int + 1

        print(count)

        FIRDatabase.database().reference().child("genera_Room_Index").child(String(describing: count)).setValue(your_Value, withCompletionBlock: { (Err, Ref) in

            print(Err ?? "No error")
            print(Ref)

            if Err == nil{

                FIRDatabase.database().reference().child("genera_Room_Index_Count").runTransactionBlock({ (currentData) -> FIRTransactionResult in

                    var value = currentData.value as? Int

                    if value == nil {
                        value = 0
                    }

                    currentData.value = value! + 1

                    return FIRTransactionResult.success(withValue: currentData)

                })
            }
        })
    })
}

安全规则

"genera_Room_Index" :{

     ".read" : "true",    // Or whatever your authentication flowchart might be
    ".write" : "true",    // Or whatever your authentication flowchart might be


  },

  "genera_Room_Index_Count" :{

     ".read" : "true",     // Or whatever your authentication flowchart might be
    ".write" : "true",     // Or whatever your authentication flowchart might be 


  },

SwID Firebase数据库AutoID数组

1 个答案: