Unity C#中嵌套字典的奇怪行為

Question

我在字典中使用字典。 分配的最后一個鍵值也被存儲為所有先前鍵的值，即使各個鍵分配不同。 我錯過了什么嗎？

Dictionary<string, Dictionary <int,bool>> seenValsRounds= new Dictionary<string, Dictionary<int, bool>>();

void prepareRoundsVals()
    {       
        Dictionary <int,bool> roundVals = new Dictionary<int, bool> ();
        roundVals.Add (0,false);
        seenValsRounds.Add ("A", roundVals);
        seenValsRounds.Add ("B", roundVals);
        seenValsRounds.Add ("C", roundVals);
        seenValsRounds.Add ("D", roundVals);
        seenValsRounds ["A"] [0] = false;
        seenValsRounds ["B"] [0] = false;
        seenValsRounds ["C"] [0] = false;
        seenValsRounds ["D"] [0] = true;
        foreach (KeyValuePair<string, Dictionary<int,bool>> kvp in seenValsRounds) {            
            Debug.Log(kvp.Key + " in round " + 0 + ": " + seenValsRounds [kvp.Key][0]);     
        }
    }

預期結果：A 為假，B 為假，C 為假，D 為真

實際結果：A 為真，B 為真，C 為真，D 為真

---

根據答案和評論中的建議解決了以下問題。 每個嵌套字典也應該是“新的”：

        Dictionary <int,bool> roundVals1 = new Dictionary<int, bool> ();
        Dictionary <int,bool> roundVals2 = new Dictionary<int, bool> ();
        Dictionary <int,bool> roundVals3 = new Dictionary<int, bool> ();
        Dictionary <int,bool> roundVals4 = new Dictionary<int, bool> ();
        roundVals1.Add (0,false);
        roundVals2.Add (0,false);
        roundVals3.Add (0,false);
        roundVals4.Add (0,false);
        seenValsRounds.Add ("A", roundVals1);
        seenValsRounds.Add ("B", roundVals2);
        seenValsRounds.Add ("C", roundVals3);
        seenValsRounds.Add ("D", roundVals4);

Answer 1

那是因為您將相同的引用放在了 seenValsRounds 字典中的 roundVals 字典對象中。 您應該為 A、B、C 和 D 創建一個新字典。

Answer 2

它可能有幫助或嵌套字典替代。

創建 Sample.cs 腳本並對其進行測試。

 public Dictionary<string,Tuple<string,string,string,int>> _planets = new 
     Dictionary<string, Tuple<string,string, string, int>>();
     void Start()
     {
           string myKey = string.Concat("1","MetalMine","Level");
           if(!_planets.ContainsKey(myKey))
           {
               _planets.Add(myKey,Tuple.Create("1","MetalMine","Level",0));
           }
           Debug.Log("_planets mykey "+myKey+" ==> "+_planets[myKey].Item4);
     }