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无法对Unity中的Firebase数据进行排序。C级#

firebase-realtime-database unity3d firebase c#

SamohtVII · 技术社区 · 7 年前

public void getHighScores() {
        FirebaseDatabase.DefaultInstance.GetReference("Scores").OrderByChild("score").LimitToLast(10).ValueChanged += HandleValueChanged;
}

void HandleValueChanged(object sender, ValueChangedEventArgs args) {
    if (args.DatabaseError != null) {
        Debug.LogError("Error: " + args.DatabaseError.Message);
        return;
    }
    // Do something with the data in args.Snapshot
    var highscoreobject = args.Snapshot.Value as Dictionary<string, System.Object>;
    //Debug.Log(args.Snapshot.Child("score").Value);
    foreach (var item in highscoreobject)
    {
        string userScore = "";
        //Debug.Log(item.Key); // Kdq6...
        var values = item.Value as Dictionary<string, System.Object>;
        var list = item.ToList();
        list.Sort();
        foreach (var v in values)
        {
            //Debug.Log(v.Key + ":" + v.Value); // category:livingroom, code:126 ...
            userScore += v.Value;
        }
        highscoreText.text += userScore+" \n";
    }
}

谢谢

1 回复 | 直到 7 年前

Frank van Puffelen 6 年前

根据定义,字典中的条目是无序的。意思是你一打电话 args.Snapshot.Value as Dictionary<string, System.Object>

如果要保持顺序,应该循环快照的子级,并且只调用 .Value 当顺序不再重要时(即当你到达酒店时)。比如说:

void HandleValueChanged(object sender, ValueChangedEventArgs args) {
    if (args.DatabaseError != null) {
        Debug.LogError("Error: " + args.DatabaseError.Message);
        return;
    }
    foreach (DataSnapshot childSnapshot in snapshot.Children)
    {
        Debug.log(childSnapshot.Key+": "+childSnapshot.Child("uid").Value+" "+childSnapshot.Child("score").Value
    }
}

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