我有一个看起来像这个图像的UITableView
.
当我滑动删除记录时,我可以将其从存储它的数组中完全删除,但是我在Firebase中访问它时很难将其删除.
对于上面的屏幕截图,我的Firebase数据库结构如下：
-KWc7RTuOe5PefiMM2tL
bodyPart: "Arms"
exerciseName: "Test 1 "
userId: "8rHmyTxdocTEvk1ERiiavjMUYyD3"
-KWcEbpw_f6kxcePY5cO
bodyPart: "Chest"
exerciseName: "Test 2 "
userId: "8rHmyTxdocTEvk1ERiiavjMUYyD3"
-KWcEdUN49QaJIVf0kwO
bodyPart: "Legs"
exerciseName: "Test 3 "
userId: "8rHmyTxdocTEvk1ERiiavjMUYyD3"
-KWcFrMSaLKQRxghGHyT
bodyPart: "Arms"
exerciseName: "Test 4"
userId: "8rHmyTxdocTEvk1ERiiavjMUYyD3"
如何访问创建时设置的autoId值,例如“-KWc7RTuOe5PefiMM2tL”,以便删除该子节点？
或者我可以根据登录的UserId访问exerciseName值吗？
解决方法
继MHDev已回答之后：
func tableView(_ tableView: UITableView,commit editingStyle: UITableViewCellEditingStyle,forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
if let exerciseName = exercises[indexPath.row].exerciseName {
let ref = FIRDatabase.database().reference().child("userExercises")
ref.queryOrdered(byChild: "exerciseName").queryEqual(tovalue: exerciseName).observe(.childAdded,with: { (snapshot) in
snapshot.ref.removeValue(completionBlock: { (error,reference) in
if error != nil {
print("There has been an error:\(error)")
}
})
})
}
exercises.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath],with: .left)
}
}