從其他腳本文件變量Unity C＃獲取價值

Question

我有一個奇怪的問題。 我想從其他腳本文件中獲取價值，但實際上這很容易。 但是這一次我有另一種情況。

例如：

我有player.cs用數據類型字典保存數據

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class player : MonoBehaviour {

    public Dictionary <string, Dictionary <string, int> > product;

}

然后我有margaretShop.cs來設置字典產品的值

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using System.Collections.Generic;
using System.Linq;

public class margaretShop : MonoBehaviour {
    player Player;

    // Use this for initialization
    void Start () {
        Player = GameObject.FindGameObjectWithTag ("player").GetComponent<player> ();

            setValue("A", "id", "10");
            setValue("A", "name", "A");
            setValue("A", "qty", "4");
            setValue("A", "price", "120");



    }


    // Update is called once per frame
    void Update () {

    }

    void init() {
        if (Player.product != null) {
            return;
        }
        Player.product = new Dictionary<string, Dictionary <string, int> > ();
    }

    public int getValue(string nameproduct, string property) {
        init ();

        if (Player.product.ContainsKey (nameproduct) == false) {
            return 0;
        }

        if (Player.product [nameproduct].ContainsKey (property) == false) {
            return 0;
        }

        return Player.product [nameproduct] [property];
    }

    public void setValue(string nameproduct, string property, int value) {
        init ();

        if (Player.product.ContainsKey (nameproduct) == false) {
            Player.product[nameproduct] = new Dictionary<string, int>();

        }

        Player.product [nameproduct] [property] = value; // This store to player.cs file product
    }


    public string[] getProductName() {
        return Player.product.Keys.ToArray();

    }

}

最后我用另一個腳本文件margaretSellScript.cs調用它

using UnityEngine;
using System.Collections;
using System.Linq;
using UnityEngine.UI;

public class margaretSellScript : MonoBehaviour {
    margaretShop mShop;

    player Player;

    // Use this for initialization
    void Start () {
        mShop = GameObject.FindGameObjectWithTag ("MargaretShop").GetComponent<margaretShop> ();
        Player = GameObject.FindGameObjectWithTag ("player").GetComponent<player> ();

    Debug.Log("QTY : " + mShop.getValue ("A", "qty"));

    }                 
}

在此腳本中： Debug.Log("QTY : " + mShop.getValue ("A", "qty")); 為什么我不能從player.cs產品變量字典中獲取值？ 該值必須為“ 4”吧？

錯誤是“ Object reference not set to an instance of an object 為 Object reference not set to an instance of an object

我已經在margaretSellScript.cs中這樣稱呼gameobject：

mShop = GameObject.FindGameObjectWithTag ("MargaretShop").GetComponent<margaretShop> ();
            Player = GameObject.FindGameObjectWithTag ("player").GetComponent<player> ();

任何想法？

Answer 1

但是我看到它是完好無損的。 直到我按下按鈕，我才將其設置為活動狀態。

那就是問題所在。 必須enabled該組件才能enabled GetComponent<Script> ()找到它。 默認從編輯器Enable它。 游戲開始時獲取reference然后將其disable 。

mShop = GameObject.FindGameObjectWithTag("MargaretShop").GetComponent<margaretShop>();
mShop.enabled = false; //disable it

如果您有在margaretShop腳本的Start()函數中運行的任何代碼，則可以將其刪除，並將其放在名為initScript()的自定義公共函數中。

現在，當您按下Button ，可以使用mShop.enabled = false;激活它mShop.enabled = false; ，然后調用initScript()函數在margaretShop腳本中初始化變量。 而已。