如何在Unity3d中使用相同的脚本为每个游戏对象设置不同的值变量

Question

我对Unity还是很陌生，我试图创建三个具有一个脚本的不同对象，并为每个实例设置一个值变量。

我已将脚本拖放到场景中的三个对象上，并从unity ui插槽value变量设置为每个对象不同的值！

当前代码如下：

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


public class DragBall : MonoBehaviour {

    public GameObject gameObjectToDrag;
    public Text txt;


    public int value;

    public Vector3 GOcenter;
    public Vector3 touchPosition;
    public Vector3 offset;
    public Vector3 newGOcenter;

    RaycastHit hit;

    public bool draggingMode = false;

    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void Update () {
        if (Input.GetMouseButtonDown(0)) {
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            if (Physics.Raycast(ray, out hit))
            {
                gameObjectToDrag = hit.collider.gameObject;
                GOcenter = gameObjectToDrag.transform.position;
                touchPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
                offset = touchPosition - GOcenter;
                draggingMode = true;
            }
        }

        if (Input.GetMouseButton(0)) {
            if (draggingMode) {
                touchPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
                newGOcenter = touchPosition - offset;
                gameObjectToDrag.transform.position = new Vector3(newGOcenter.x, 3, newGOcenter.z); // 0 means Y axis , so let the ball go horizontally only
            }
        }

        if (Input.GetMouseButtonUp(0)) {
            draggingMode = false;
        }

        Debug.Log(this.value);
        txt.text = this.value + "";
    }
}

编辑代码：

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


public class DragBall : MonoBehaviour {

    public GameObject gameObjectToDrag;

    public Text txt;

    public Vector3 GOcenter;
    public Vector3 touchPosition;
    public Vector3 offset;
    public Vector3 newGOcenter;

    RaycastHit hit;

    public int value;

    public bool draggingMode = false;

    // Use this for initialization
    void Start () {
        if (this.gameObjectToDrag.name == "Ball1")
        {
            this.value = 1;
        }
        else if (this.gameObjectToDrag.name == "Ball2")
        {
            this.value = 2;
        }
        else if (this.gameObjectToDrag.name == "Ball3")
        {
            this.value = 3;
        }
    }

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

        if (Input.GetMouseButtonDown(0)) {
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            if (Physics.Raycast(ray, out hit))
            {
                this.gameObjectToDrag = hit.collider.gameObject;
                GOcenter = this.gameObjectToDrag.transform.position;
                touchPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
                offset = touchPosition - GOcenter;
                draggingMode = true;
            }
        }

        if (Input.GetMouseButton(0)) {
            if (draggingMode) {
                touchPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
                newGOcenter = touchPosition - offset;

                if (this.gameObjectToDrag.name == "Ball1") {
                    this.gameObjectToDrag.transform.position = new Vector3(newGOcenter.x, 1, newGOcenter.z); // 0 means Y axis , so let the ball go horizontally only
                }
                else if (this.gameObjectToDrag.name == "Ball2")
                {
                    this.gameObjectToDrag.transform.position = new Vector3(newGOcenter.x, 2, newGOcenter.z); // 0 means Y axis , so let the ball go horizontally only
                }
                else if (this.gameObjectToDrag.name == "Ball3")
                {
                    this.gameObjectToDrag.transform.position = new Vector3(newGOcenter.x, 3, newGOcenter.z); // 0 means Y axis , so let the ball go horizontally only
                }

            }
            txt.text = this.value + "";
        }

        if (Input.GetMouseButtonUp(0)) {
            draggingMode = false;
        }
    }
}

我希望为用鼠标触摸的每个对象显示当前值变量。 现在，所有显示为0。

是否应该为每个对象创建不同的脚本并将脚本分别分配给每个对象？ 这对我idk来说不仅仅听起来是正确的方法，但是必须有一些东西！

Answer 1

您没有初始化value变量，因此当附加到3个Object时它变为0 。 即使将其初始化为数字，每个实例上仍将是该数字。

您需要一种方法来初始化每个GameObject上的value变量。 为此，您还需要一种区分每个GameObject 。 这可以通过比较GameObject的当前名称，标签，图层或GameObject实例来完成。

下面的示例使用GameObject的名称在Start函数中初始化value变量。 假设它们分别命名为“ Obj1”，“ Obj2”和“ Obj3”：

void Start()
{
    //Use 1 for Object 1
    if (this.gameObject.name == "Obj1")
    {
        value = 1;
    }
    //Use 3 for Object 2
    else if (this.gameObject.name == "Obj2")
    {
        value = 2;
    }
    //Use 3 for Object 3
    else if (this.gameObject.name == "Obj3")
    {
        value = 3;
    }
}

Answer 2

如果您在检查器中将值设置为其他数字，则此脚本应该可以工作并在日志中显示其他数字。 我看到的是您每次更新都运行txt.text = this.value 。 如果您有一个文本字段连接到球的所有实例，则它将始终显示相同的值。 如果要让文本字段显示当前被拖动的球，则应将该代码行放入if语句中，如下所示：

    if (Input.GetMouseButtonDown(0)) {
        Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        if (Physics.Raycast(ray, out hit))
        {
            //Add line here
            txt.text = this.value + "";
            gameObjectToDrag = hit.collider.gameObject;
            GOcenter = gameObjectToDrag.transform.position;
            touchPosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            offset = touchPosition - GOcenter;
            draggingMode = true;
        }
    }

如果您为每个球设置了不同的值，那么它应该起作用