Question

我有一个奇怪的问题。我想从其他脚本文件中获取价值，但实际上它很容易。但这次我还有另一个案例。

例如：

我有player.cs使用数据类型字典保存数据

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

public class player : MonoBehaviour {

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

}

然后我margaretShop.cs设置字典产品的值

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();

    }

}

然后我用另一个脚本文件margaretSellScript.cs

调用它

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"));

    }                 
}

在这个脚本中：Debug.Log("QTY : " + mShop.getValue ("A", "qty"));为什么我无法从player.cs产品变量字典中获取值？值必须“4”对吗？

错误是 Object reference not set to an instance of an object

我已经在 margaretSellScript.cs 上调用了这样的游戏对象：

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

任何想法？

Answer 1

但是我看到它被吸引了。只是我没有激活它直到我按下按钮。

这就是问题所在。该组件必须为enabled，GetComponent<Script> ()才能找到它。 {/ 1}}默认情况下来自编辑器。游戏开始时会获得Enable然后reference。

disable

如果您有任何代码在mShop = GameObject.FindGameObjectWithTag("MargaretShop").GetComponent<margaretShop>(); mShop.enabled = false; //disable it脚本的Start()函数中运行，则可以删除它们并将它们放在名为margaretShop的自定义公共函数中。

现在，当您按下initScript()时，可以使用Button激活它，然后调用mShop.enabled = false;函数在initScript()脚本中初始化变量。那就是它。

从其他脚本文件变量Unity C＃获取价值

1 个答案: