事件/委託機制（event/delegate）（Unity3D開發之十七）

標籤：unity   event   delegate   handle   

猴子原創，歡迎轉載。轉載請註明： 轉載自Cocos2Der-CSDN，謝謝！
原文地址: http://blog.csdn.net/cocos2der/article/details/46539433

Delegate作用我就不多說了，Unity中可以直接使用EventHandler實現事件委託，咱們直接案例吧。

一、情境物體移動結束後事件監聽

假如PlayerControl，移動結束後觸發MoveComplete事件。

using UnityEngine;using System.Collections;using System;public class PlayerControl : MonoBehaviour {    public event EventHandler MoveComplete;    // Use this for initialization    void Start () {    }    // Update is called once per frame    void Update () {        if (Input.GetMouseButtonUp(0)) {            // Test logic for PlayerMoveComplete            PlayerMoveComplete();        }    }    void PlayerMoveComplete()    {        if (MoveComplete != null) {            MoveComplete(this, EventArgs.Empty);        }    }}

事件接收處理

using UnityEngine;using System.Collections;using System;public class GameManager : MonoBehaviour {    public static GameManager Instance;    public PlayerControl playerControl;    void Awake ()     {        // check there isn‘t more than one instance of the GameManager in the scene        if(Instance != null){            Debug.LogError("More than one GameManager found in the scene");            return;        }        // set the global instance        Instance = this;    }    // Use this for initialization    void Start () {        playerControl.MoveComplete += HandleMoveComplete;    }    void HandleMoveComplete (object sender, EventArgs e)    {        Debug.Log("MoveComplete:");    }    // Update is called once per frame    void Update () {    }}

這裡由於使用的EventHandler實現，所以在事件中無法傳遞自訂參數。

二、自訂Event，事件中傳遞自訂參數

1、自訂EventArgs

using UnityEngine;using System.Collections;using System;public class PlayerMoveEventArgs : EventArgs {    private string message;    public PlayerMoveEventArgs(string message)    {        this.message = message;    }    public string Message    {        get{return message;}    }}public delegate void MoveCompleteHandle(object sender, PlayerMoveEventArgs e);

那麼我們修改下PlayerControl

using UnityEngine;using System.Collections;using System;public class PlayerControl : MonoBehaviour {    public event EventHandler MoveComplete;    public event MoveCompleteHandle CustomMoveComplete;    // Use this for initialization    void Start () {    }    // Update is called once per frame    void Update () {        if (Input.GetMouseButtonUp(0)) {            // Test logic for PlayerMoveComplete            PlayerMoveComplete();        }    }    void PlayerMoveComplete()    {        if (MoveComplete != null) {            MoveComplete(this, EventArgs.Empty);        }        if (CustomMoveComplete != null) {            CustomMoveComplete(this, new PlayerMoveEventArgs("Move:" + this.name));        }    }}

處理事件的我們也修改下

using UnityEngine;using System.Collections;using System;public class GameManager : MonoBehaviour {    public static GameManager Instance;    public PlayerControl playerControl;    void Awake ()     {        // check there isn‘t more than one instance of the GameManager in the scene        if(Instance != null){            Debug.LogError("More than one GameManager found in the scene");            return;        }        // set the global instance        Instance = this;    }    // Use this for initialization    void Start () {        playerControl.MoveComplete += HandleMoveComplete;        playerControl.CustomMoveComplete += HandleCustomMoveComplete;    }    void HandleCustomMoveComplete (object sender, PlayerMoveEventArgs e)    {        Debug.Log("HandleCustomMoveComplete:" + e.Message);    }    void HandleMoveComplete (object sender, EventArgs e)    {        Debug.Log("MoveComplete:");    }    // Update is called once per frame    void Update () {    }}

ok，現在你可以自由的玩耍了。

事件/委託機制（event/delegate）（Unity3D開發之十七）