在swift中从firebase读取登录页面的数据

Question

我想在用户登录时制作身份验证数据。

这是我的代码：

Public Sub TransposeRows3()     'insert J cell while looping
 Dim ws As Worksheet, lr As Long, c As Long, t As Long

 Set ws = ActiveSheet
 lr = ws.Cells(ws.Rows.Count, "D").End(xlUp).Row
 c = 2
 t = 2
 Application.ScreenUpdating = False
 While c <= lr
  ws.Range("A" & c).Copy ws.Range("J" & t & ":K" & t)
  ws.Range("L" & t).Resize(, 7) = WorksheetFunction.Transpose(ws.Range("D" & c).Resize(7))
  c = c + 7
  t = t + 1
 Wend
 Application.ScreenUpdating = True
End Sub

这是我的Json：

    let ref = Database.database().reference().child("data")

    ref.observeSingleEvent(of: .childAdded, with: { (snapshot) in
        let value = snapshot.value as? NSDictionary
        let score = value?["data"] as? String ?? ""


        if userPhone == score{
        self.performSegue(withIdentifier: "loginSuccessSegue", sender: nil)
        }else{

            self.performSegue(withIdentifier: "loginButtonSegue", sender: nil)

        }

    })

Answer 1

将.childAdded替换为.value。它应该工作。

ref.observeSingleEvent(of: .value, with: { (snapshot) in
    let value = snapshot.value as? NSDictionary
    let score = value?["data"] as? String ?? ""
    }