Unity之一天一个技术点（十九）--初学委托

委托这个对于C#初学者比较头疼，我也是看了半天资料才稍微弄懂一点，下面的代码还是挺简单的，也算用了委托这么逼格高的技术了。

using UnityEngine;
using System.Collections;

//三个军衔级别的命令类型//
public enum TypeOfCommands
{
    General,
    Captain,
    Soldier
}

public class EventManager : MonoBehaviour
{

    //定义一个通用代理，根据传递类型，发送消息
    public delegate void CommonUse(TypeOfCommands cmd);
    //定义一个事件发送三个军衔的命定
    public static event CommonUse whenStep_CommonUse;

    //通用指令传递事件类型//
    public static void sendMessage_Common(TypeOfCommands toc)
    {
        whenStep_CommonUse(toc);
    }
}

using UnityEngine;
using System.Collections;

public class MainLogic : MonoBehaviour
{

    public GUIText myGuiText;//用于显示消息的ui文字  

    void Start()
    {
        EventManager.whenStep_CommonUse += whenStep;
    }

    //根据命令类型，执行
    void whenStep(TypeOfCommands toc)
    {
        switch (toc)
        {
            case TypeOfCommands.General:
                myGuiText.text = "i'm General,the captain should hear from me";
                break;
            case TypeOfCommands.Captain:
                myGuiText.text = "i'm Captain,every soldier need to obey to me";
                break;
            case TypeOfCommands.Soldier:
                myGuiText.text = "i'm soldier,i need to receive commands";
                break;

        }
    }

    void OnGUI()
    {
        if(GUI.Button(new Rect(0,0,100,30),"General"))
        {
            EventManager.sendMessage_Common(TypeOfCommands.General);
        }
        if(GUI.Button(new Rect(0,50,100,30),"Captain"))
        {
            EventManager.sendMessage_Common(TypeOfCommands.Captain);
        }
        if(GUI.Button(new Rect(0,100,100,30),"Soldier"))
        {
            EventManager.sendMessage_Common(TypeOfCommands.Soldier);
        }  

    }  

}