unity代理委托的简单用法

来源：互联网发布：乌鲁木齐中亚知乎编辑：程序博客网时间：2024/04/28 20:09

首先打开unity，然后新建个脚本叫testDelegate，内容为：

using System.Collections;using System.Collections.Generic;using UnityEngine;public struct teteEventArgs{public float distance;}public delegate void teteEventHandler(object sender, teteEventArgs e);public class testDelegate : MonoBehaviour {public event teteEventHandler GazeOn;public event teteEventHandler GazeOff;// Use this for initializationvoid Start () {}// Update is called once per framevoid Update () {if (Input.GetKeyDown (KeyCode.R)) {Debug.Log("点击r    1");teteEventArgs e;e.distance = 100;if (GazeOn != null) {Debug.Log("点击r    2");GazeOn (this, e);}}if (Input.GetKeyDown (KeyCode.U)) {Debug.Log("点击u    1");teteEventArgs e;e.distance = 50;if (GazeOff != null) {Debug.Log("点击u    2");GazeOff (this, e);}}}}

保存，然后回到unity场景里，新建个cube挂载上这个脚本，可以点击运行试试，点击r或者u都只会执行到log1的位置，证明这两个代理都是空的。

接下来需要写接收的代码，再新建个c#脚本叫testDelegate2，内容为：

using System.Collections;using System.Collections.Generic;using UnityEngine;public class testDelegate2 : MonoBehaviour {// Use this for initializationvoid Start () {GameObject.Find ("Cube").GetComponent<testDelegate> ().GazeOn += touchR;GameObject.Find ("Cube").GetComponent<testDelegate> ().GazeOff += touchU;}// Update is called once per framevoid Update () {}void touchR(object sender, teteEventArgs e){Debug.Log ("点击到了r键，进行回调 distance为 " + e.distance);}void touchU(object sender, teteEventArgs e){Debug.Log ("点击到了u键，进行回调 distance为 " + e.distance);}}

回到场景新建个sphere挂上试试

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