脚本执行顺序

前言

搭建一个示例来验证Unity脚本的执行顺序，大概测试以下部分：

• 物理方面(Physics)
• 渲染(Scene rendering)
• 输入事件(InputEvent)

流程图

Unity文档：

原图地址：

测试场景

搭建场景

示例下载：

根据上图中的脚本生命周期，我编写三个脚本来测试部分阶段的生命周期：

• Logs.cs 输出日志(可选)
• TestInputEvent.cs(Input输入事件)
• TestPhysicOrder.cs(物理事件执行顺序)
• TestSceneRender.cs(Render顺序)

创建一个空的场景，创建三个Gameobject，每个gameobject上分别绑上要测试的脚本。每次测试不同的功能，分别激活不同的gameobject

打印调用堆栈脚本

可以打印调用方法的堆栈，包括方法名，文件名

github:

using System;using System.Diagnostics;public class Logs  {    /// 
    /// 打印调用者的方法名    /// 
    public static void DoLog()    {        StackTrace st = new StackTrace(true);        //获取当前调用的方法名        StackFrame stackFrame = st.GetFrame(1);        //var callInfo = string.Format("{0}:{1}.{2}",stackFrame.GetFileName(),stackFrame.GetFileLineNumber(),stackFrame.GetMethod().Name);        var callInfo = stackFrame.GetMethod().Name.ToString();        DoLog(callInfo);    }    public static void DoLog(string szMsg, params object[] args)    {        string log = string.Format("[{0}]{1}", DateTime.Now.ToString("HH:mm:ss.ffff"), string.Format(szMsg, args));        UnityEngine.Debug.Log(log);    }}

物理测试

测试脚本

测试脚本中写了Unity的各个脚本函数，大致内容如下：

github:

using System;using UnityEngine;using System.Collections;public class TestPhysicOrder : MonoBehaviour{    // Reset to default values    public void Reset()    {        Logs.DoLog();    }    // Awake is called when the script instance is being loaded    public void Awake()    {        StartCoroutine(YieldOneFrame());        StartCoroutine(YieldEndOfFrame());        StartCoroutine(YieldWaitForFixedUpdate());        Logs.DoLog();    }    // This function is called when the object becomes enabled and active    public void OnEnable()    {        Logs.DoLog();    }    // Use this for initialization    void Start()    {        Logs.DoLog();    }    // This function is called every fixed framerate frame, if the MonoBehaviour is enabled    public void FixedUpdate()    {        Logs.DoLog();    }    // Update is called once per frame    void Update()    {        Logs.DoLog();    }    IEnumerator YieldWaitForFixedUpdate()    {        yield return new WaitForFixedUpdate();        Logs.DoLog("WaitForFixedUpdate");    }    IEnumerator YieldOneFrame()    {        yield return 1;        Logs.DoLog("YieldOneFrame");    }    IEnumerator YieldEndOfFrame()    {        yield return new WaitForEndOfFrame();        Logs.DoLog("YieldEndOfFrame");    }    // LateUpdate is called every frame, if the Behaviour is enabled    public void LateUpdate()    {        Logs.DoLog();    }    // This function is called when the behaviour becomes disabled or inactive    public void OnDisable()    {        Logs.DoLog();    }    // This function is called when the MonoBehaviour will be destroyed    public void OnDestroy()    {        Logs.DoLog();    }    // Sent to all game objects when the player gets or looses focus    public void OnApplicationFocus(bool focus)    {        Logs.DoLog();    }    // Sent to all game objects when the player pauses    public void OnApplicationPause(bool pause)    {        Logs.DoLog();    }    // Sent to all game objects before the application is quit    public void OnApplicationQuit()    {        Logs.DoLog();    }}

测试结果

开始部分截图

结束部分截图

Render测试

测试脚本

github:

using System;using UnityEngine;public class TestSceneRender : MonoBehaviour{    // OnPreCull is called before a camera culls the scene    public void OnPreCull()    {        Logs.DoLog();    }    // OnPreRender is called before a camera starts rendering the scene    public void OnPreRender()    {        Logs.DoLog();    }    // Callback that is sent if an associated RectTransform has it's dimensions changed    public void OnRectTransformDimensionsChange()    {        Logs.DoLog();    }    // Callback that is sent if an associated RectTransform is removed    public void OnRectTransformRemoved()    {        Logs.DoLog();    }    // OnRenderImage is called after all rendering is complete to render image    public void OnRenderImage(RenderTexture source, RenderTexture destination)    {        Logs.DoLog();    }    // OnRenderObject is called after camera has rendered the scene    public void OnRenderObject()    {        Logs.DoLog();    }    // OnWillRenderObject is called once for each camera if the object is visible    public void OnWillRenderObject()    {        Logs.DoLog();    }    // Implement this OnDrawGizmosSelected if you want to draw gizmos only if the object is selected    public void OnDrawGizmos()    {        Logs.DoLog();    }    // OnGUI is called for rendering and handling GUI events    public void OnGUI()    {        Logs.DoLog();    }}

测试结果

当把测试脚挂在Cube或者Camera上，会执行的函数是不相同的。

绑在Camera上

绑在Cube上

本文转自赵青青博客园博客，原文链接：http://www.cnblogs.com/zhaoqingqing/p/5990370.html，如需转载请自行联系原作者