unity 3D经常需要设计到不同object之间数据通信和事件信息触发。这里可以利用C#本身的事件和代理的方法来实现。

这里实现了在GUI上点击按钮，触发事件，移动object cube移动的例子。

Main Camera 挂载实现GUI的 Label.cs脚本

Cube挂载 Cube.cs脚本

Label.cs

using UnityEngine;

using System;

// 声明物体移动代理类型

public delegate void EventObjectMoveDelegate(Vector3 dirct);

public class Label : MonoBehaviour {

    private Rect windowRect;

    public event EventObjectMoveDelegate cubeMove;

    void Start()

    {

        windowRect = new Rect(20, 20, 200, 300);

    }

    // Update is called once per frame

    void Update()

    {

    }

    void OnGUI()

    {

        windowRect = GUI.Window(0, windowRect, Mywindowfunc, "windows");

    }

    void Mywindowfunc(int windowId)

    {

        if (GUI.Button(new Rect(10, 20, 100, 20), "moveUp"))

        {

            if (null != cubeMove)

            {

                cubeMove(Vector3.up);

            }

        }

        if (GUI.Button(new Rect(10, 50, 100, 20), "moveDown"))

        {

            if (null != cubeMove)

            {

                cubeMove(Vector3.down);

            }

        }

        if (GUI.Button(new Rect(10, 80, 100, 20), "moveLeft"))

        {

            if (null != cubeMove)

            {

                cubeMove(Vector3.left);

            }

        }

        if (GUI.Button(new Rect(10, 110, 100, 20), "moveRight"))

        {

            if (null != cubeMove)

            {

                cubeMove(Vector3.right);

            }

        }

        GUI.DragWindow(new Rect(0, 0, 10000, 1000));

    }

}

cube.cs

using UnityEngine;

using System.Collections;

using System;

public class cube : MonoBehaviour {

    // Use this for initialization

    void Start () {

        GameObject.Find("Main Camera").GetComponent<Label>().cubeMove += cubeMoveHandler;

    }

	// Update is called once per frame

	void Update () {

    }

    void cubeMoveHandler(Vector3 dirct)

    {

        transform.Translate(dirct);

    }

}

代码地址：

https://github.com/caimagic/Unity_Object_Commucation_With_Delegate.git