Question

根据我的理解，这里应该发生的事情会在评论中解释，但由于某些原因我在编辑器中出现了这个错误

KeyNotFoundException：字典中没有给定的键。 System.Collections.Generic.Dictionary`2 [System.Int32，System.String] .get_Item （Int32键）（at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/Dictionary.cs:150） UpgradeManager.ScanForAvailableUpgrades（）（at Assets / Scripts / UpgradeManager.cs：125 UpgradeManager.Update（）（at 资产/脚本/ UpgradeManager.cs：70）

在调用函数DisableSameType后发生错误

public string GetUpgradeType(string upgradeName){
        return upgradeTypes [upgradeName];
    }

    public void DisableSameType (string upgradeName){
        string upgradeType = GetUpgradeType (upgradeName);

        string[] keys = KeyByValue (upgradeTypes, upgradeType); //returns all the keys of the same type

        if (keys.Length == 0) { //if there are no keys
            return;             //then return
        } else {
            for (int i = 0; i < keys.Length; i++) { //loop through all the keys
                upgradesOwned [keys [i]] = false;   //Set them to false
            }
        }
    }

以下是其他相关代码

public List<string> AvailableUpgrades = new List<string>();

    protected Dictionary<int,string> upgradeNames = new Dictionary<int, string>();

    protected Dictionary<string,bool> upgradesOwned = new Dictionary<string, bool>();
    protected Dictionary<string,bool> upgradesPurchased = new Dictionary<string, bool>();

    protected Dictionary<string,int> upgradeCost = new Dictionary<string, int>(); 

    /* UPGRADE TYPES
     * Title
     * Layout
     * Scoreboard
     * VisualCountdown
     */
    protected Dictionary<string,string> upgradeTypes = new Dictionary<string, string>();

protected bool IsPurchased(string upgradeName){
    return upgradesPurchased [upgradeName];
}

public static string[] KeyByValue(Dictionary<string, string> dict, string val)
    {
        string key = null;
        foreach (KeyValuePair<string, string> pair in dict)
        {
            if (pair.Value == val)
            { 
                key += pair.Key + "|"; 
                break; 
            }
        }
        return key.Split('|');
    }

protected void ScanForAvailableUpgrades(){
        AvailableUpgrades.Clear ();                                             //Clear the list
        int scanRange = GetUnits() + GameManager.Instance.scanRange;            //Get the range by adding the scanRange to current units
        for (int i = 0; i < upgradesOwned.Count; i++) {                     //Loop through all upgrades
            if (IsPurchased (upgradeNames [i])) {
                //return
            } else {
                if (scanRange >= upgradeCost [upgradeNames [i]]) {                      //Check if the cost is within the scanrange
                    if (AvailableUpgrades.Contains (upgradeNames [i])) {                //Check if upgrade is already in the available list
                        //return;                                                   //If it is we just return
                    } else {                                                        //Else
                        if (upgradesOwned [upgradeNames [i]]) {                 //Check if the user already has the upgrade *NOTE* Should probaby check for this first to improve performance
                            //return;                                               //If it is return
                        } else {                                                    //Else
                            AvailableUpgrades.Add (upgradeNames [i]);                   //Upgrade does not exist and is not bought so add it to the available list
                        }
                    }
                }
            }
        }
    }

在进一步调试后，我发现Debug.Log(keys[i]);将第一个字符串作为“basicTitle |”返回并且字符串字符串为空

编辑：我可以看到我的问题似乎误导了第125行是这一行if (IsPurchased (upgradeNames [i])) {但是我已经完成并且在评论出“DisableSameType”之后错误消失了方法DisableSameType是一个新函数并且错误没有开始发生，直到它被实施，所以我100％肯定这是错误的来源，我只是不确定是什么导致它

Answer 1

key词典中没有有效的upgradesOwned 在将key value设置为false之前，您应该检查dictionary是否有key。如果它有key，那么您可以false，否则您需要在Add中dictionary键值对。
所以，代替代码中的这一行：

upgradesOwned [keys [i]] = false;   //Set them to false

应该是这样的：

if(upgradesOwned.ContainsKey(keys[i])){
    upgradesOwned [keys [i]] = false;   //Set them to false
}else{
    upgradesOwned.Add(keys [i],false);   //Add new key and set them to false
}

键不存在错误

1 个答案: