UnityWorkingNotes.md

...menustart

• 工作相关 Unity 笔记
  • PostProcessBuild
  • Unity Archive
  • isDebug
  • comments in inspector
  • open new OSX unity instance
  • change the order or child object
  • AB: build AssetBundles
  • get the name of all AssetBundles
  • inform when Asset changed
  • clean Asset Bundle name
  • set Asset Bundle name
  • UGUI event callback
  • 获取脚本名字
  • UI Text 真实宽高
  • iOS9 App Slicing
  • 遍历目录
  • native plugin bool 返回值问题
  • Unity Engine/Editor 源码
  • 调用父类 override 方法
  • 优化
    • 5.3 UI 系统
    • assetbundle 内存管理
    • code strip & link.xml
    • MonoCompatibility
  • Build from command line
  • 关闭 Debug.Log 日志
  • IOS - Could not produce class with ID
  • check if animation is end
  • iOS , overwrite UnityAppController
  • check 32-bit or 64-bit
  • RectTransform
  • Change UI Opacity , Alpha
  • ClearChildren
  • Force canvas sorting order
  • change Image's Source Image
  • c/c++ plugin Log
  • detect whether an object has been destroyed ?
  • ScrollView 实践
  • reset scroll rect content to original postion
  • Dictionary iteration
  • AES , encrypt by python, decrypt by c#
  • http request under proxy
  • convert Input.mouseposition to object local space

...menuend

工作相关 Unity 笔记

PostProcessBuild

PostProcessBuild 这个 attribute 修饰的 static function 会在 Unity 建置完之后被呼叫。这个函式需要接受两个参数，一个是 BuildTarget enum ，代表建置的目标平台。另一个是 string 是建置的目标目录。

使用 PostProcessBuild 设定 Unity 产生的 Xcode Project

• PS: OnPostprocessBuild(BuildTarget target, string pathToBuiltProject) 的参数 pathToBuiltProject ， 使用 cmd line编译时，不包含路径

Unity Archive

https://unity3d.com/get-unity/download/archive

isDebug

Debug.isDebugBuild

comments in inspector

[Header("Button Settings")]
[Tooltip("Arbitary text message")]

open new OSX unity instance

open -na Unity

change the order or child object

transform.SetSiblingIndex
transform.GetSiblingIndex

AB: build AssetBundles

    [MenuItem ("Assets/Build AssetBundles")]
    public static void BuildAllAssetBundles ()
    {
        // clean all exist asset bundle name
        ClearAssetBundlesName.clean ();
        // re-set asset bundle
        SetAssetBundleName.setNames();

        // create out folder
        string outputPath = "./OutAssetBundles" ;
        //Path.Combine (AssetBundlesOutputPath,Platform.GetPlatformFolder(EditorUserBuildSettings.activeBuildTarget));
        if (!Directory.Exists (outputPath))
        {
            Directory.CreateDirectory(outputPath);
        }

        // build pipline
        BuildPipeline.BuildAssetBundles ( outputPath  );

        ClearAssetBundlesName.clean ();

        AssetDatabase.Refresh ();
    }

BuildAssetBundleOptions:

BuildAssetBundleOptions.ChunkBasedCompression |  BuildAssetBundleOptions.DeterministicAssetBundl

ChunkBasedCompression 适合实时动态加载

get the name of all AssetBundles

public class GetAssetBundleNames
{
    public static void GetNames ()
    {
        var names = AssetDatabase.GetAllAssetBundleNames();
        foreach (var name in names)
            Debug.Log ("AssetBundle: " + name);
    }
}

inform when Asset changed

// info when asset changed
public class MyPostprocessor : AssetPostprocessor {

    void OnPostprocessAssetbundleNameChanged ( string path,
        string previous, string next) {
        Debug.Log("AB: " + path + " old: " + previous + " new: " + next);
    }
}

clean Asset Bundle name

public class ClearAssetBundlesName {

    public static void clean()
    {
        int length = AssetDatabase.GetAllAssetBundleNames ().Length;
        Debug.Log ( "---- existing ab name num:" + length);
        string[] oldAssetBundleNames = new string[length];
        for (int i = 0; i < length; i++) 
        {
            oldAssetBundleNames[i] = AssetDatabase.GetAllAssetBundleNames()[i];
        }

        for (int j = 0; j < oldAssetBundleNames.Length; j++) 
        {
            AssetDatabase.RemoveAssetBundleName(oldAssetBundleNames[j],true);
        }
        length = AssetDatabase.GetAllAssetBundleNames ().Length;
        Debug.Log ( "----- new ab name num:" + length);
    }
}

set Asset Bundle name

public class SetAssetBundleName {
    //*
    public static void setNames( ) {
        
        walk( "./Assets" );
    }
    //*/
    static void walk(string source )
    {
        DirectoryInfo folder = new DirectoryInfo (source);
        FileSystemInfo[] files = folder.GetFileSystemInfos ();
        int length = files.Length;
        for (int i = 0; i < length; i++) {
            if(files[i] is DirectoryInfo)
            {
                walk(files[i].FullName);
            }
            else
            {
                if(!files[i].Name.EndsWith(".meta") && !files[i].Name.EndsWith(".cs") )
                {
                    setAssetBundleName (files[i].FullName);
                    //Debug.Log( files[i].Name ) ;
                }
            }
        }
    }
    static void setAssetBundleName(string source)
    {
        string _source = Replace (source);
        string _assetPath = "Assets" + _source.Substring (Application.dataPath.Length);
        string _assetPath2 = _source.Substring (Application.dataPath.Length + 1);
        //Debug.Log (_assetPath);

        //在代码中给资源设置AssetBundleName
        AssetImporter assetImporter = AssetImporter.GetAtPath (_assetPath);

        string assetName = "nofolder"; 
        int indexLastSlash = _assetPath2.LastIndexOf ("/");
        if (indexLastSlash > 0)
            assetName = _assetPath2.Substring (0, _assetPath2.LastIndexOf ("/"));
        else
            assetName = _assetPath2 ;

        // add suffix to avoid the case: bot res file and folder in a parent folder
        assetName += ".unity"; 
        
        //Debug.Log (assetName);
        assetImporter.assetBundleName = assetName;
    }

    static string Replace(string s)
    {
        return s.Replace("\\","/");
    }
}

UGUI event callback

Dropdown scriptCameraList = cameraList.GetComponent<Dropdown> (  );

scriptCameraList.onValueChanged.AddListener((int id ) =>
{
        cameraChoosed( id );
});

获取脚本名字

this.GetType().Name

UI Text 真实宽高

text.preferredWidth
text.preferredHeight

iOS9 App Slicing

http://forum.unity3d.com/threads/second-preview-build-for-ios-9-on-demand-resources-and-app-slicing-support.353491/

遍历目录

private static void GetDirs(string dirPath, ref List<string> dirs)  
{   
    if ( !Directory.Exists (dirPath))
        return;

    foreach (string path in Directory.GetFiles(dirPath))  
    {  
        //获取所有文件夹中包含后缀为 .prefab 的路径  
        //if (System.IO.Path.GetExtension(path) == ".prefab")  
        dirs.Add( path );   // path.Substring(path.IndexOf("Assets"))
        //Debug.Log(path.Substring(path.IndexOf("Assets")));  
        
    }  

    if (Directory.GetDirectories(dirPath).Length > 0)  //遍历所有文件夹  
    {  
        foreach (string path in Directory.GetDirectories(dirPath))  
        {  
            GetDirs(path, ref dirs);  
        }  
    }  
}

native plugin bool 返回值问题

[DllImport ("__Internal")]
[return: MarshalAs(UnmanagedType.U1)]
private static extern bool carFileExists(  string path ) ;

Unity Engine/Editor 源码

https://bitbucket.org/Unity-Technologies/ui/src/b5f9aae6ff7c2c63a521a1cb8b3e3da6939b191b?at=5.3

调用父类 override 方法

base.func( ... )

优化

5.3 UI 系统

不需要交互的UI组件, 去掉 ray caster 选项 移动平台，使用 touchInputModule

assetbundle 内存管理

创建时：

• 加载完后立即AssetBundle.Unload(false),释放AssetBundle文件本身的内存镜像，但不销毁加载的Asset对象

释放时：

• 如果有Instantiate的对象，用Destroy进行销毁
• Resources.UnloadUnusedAssets,释放已经没有引用的Asset
• 如果需要立即释放内存加上GC.Collect()

注意： 尽管guid相同, 不同 ab 实例，会 load出多分asset ，导致内存泄漏

code strip & link.xml

<linker>
       <assembly fullname="UnityEngine">
               <type fullname="UnityEngine.Animation" preserve="all"/>
               <type fullname="UnityEngine.MeshCollider" preserve="all"/>
               <type fullname="UnityEngine.AnimationClip" preserve="all"/>
               <type fullname="UnityEngine.ParticleSystemRenderer" preserve="all"/>
       </assembly>
       <assembly fullname="Assembly-CSharp">
               <type fullname="MediaPlayerCtrl" preserve="all"/>
       </assembly>
</linker>

MonoCompatibility

http://docs.unity3d.com/410/Documentation/ScriptReference/MonoCompatibility.html

Build from command line

/Applications/Unity/Unity.app/Contents/MacOS/Unity -batchmode -projectPath "${WORKSPACE}" -executeMethod Build.Build_iOS_Device -quit -logFile /dev/stdout

关闭 Debug.Log 日志

Debug.logger.logEnabled=false;  ???

IOS - Could not produce class with ID

这是因为你勾选了strip code,一些代码由于检测不到引用就被strip掉了，但是从AssetBundle里加载出来又需要根据ID找到对应代码。

• http://docs.unity3d.com/Manual/ClassIDReference.html 找到ID对应的class
• 在Assets目录下新建文件link.xml,把不该strip掉的类加进去
• 有些类比如 AnimatorController(ID-91)属于Editor包里的，不能用link.xm加回来，可以在Resource下建一个空的prefab,在上面挂一个AnimatorController，打包时留下这个prefab就可以确保这个类不被strip掉了。

<linker>
    <assembly fullname="UnityEngine">
        <type fullname="UnityEngine.Animation" preserve="all"/>
        <namespace fullname="UnityEngine.Audio" preserve="all"/>
    </assembly>
    <assembly fullname="System">
        <type fullname="System.Net.HttpWebRequest" preserve="all"/>
        <type fullname="System.Net.WebResponse" preserve="all"/>
    </assembly>
    <assembly fullname="System">
        <namespace fullname="System.Net" preserve="all"/>
        <namespace fullname="System.Net.Configuration" preserve="all"/>
    </assembly>
    <assembly fullname="mscorlib">
         <namespace fullname="System.Security.Cryptography" preserve="all"/>
    </assembly>
    <assembly fullname="Mono.Security">
        <namespace fullname="Mono.Security.Protocol.Tls" preserve="all"/>
        <namespace fullname="Mono.Security.X509" preserve="all"/>
    </assembly>
</linker>

check if animation is end

if (animator.GetCurrentAnimatorStateInfo(0).normalizedTime > 1 && !animator.IsInTransition(0))

iOS , overwrite UnityAppController

#import "UnityAppController.h"

@interface CustomAppController : UnityAppController
@end

// let unity call CustomAppController , instead of UnityAppController
IMPL_APP_CONTROLLER_SUBCLASS (CustomAppController)

@implementation CustomAppController

- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{
    [super application:application didFinishLaunchingWithOptions:launchOptions];
    
    
    return YES;
}

@end

check 32-bit or 64-bit

if (IntPtr.Size == 4) {
    //32 Bit
}
else if (IntPtr.Size == 8)
{ 
    //64 Bit
} 

RectTransform

rectTrans.offsetMin= new Vector2(-11, -12 );
rectTrans.offsetMax= new Vector2(13, 14 );

等价:

Left: -11
Button: -12
Right: -13
Top:  -14

Change UI Opacity , Alpha

AlarmText.gameObject.SetAlpha((float)0.5);

ClearChildren

public static void ClearChildren(this GameObject mbe) {
    int childrenCount = mbe.gameObject.transform.childCount;
    for (int i = childrenCount - 1; i >= 0; i--) {
        UnityEngine.Object.Destroy(mbe.gameObject.transform.GetChild(i).gameObject);
    }
}

Force canvas sorting order

if (obj) {
    Canvas canvas = obj.AddComponent<Canvas> ();
    canvas.overrideSorting = true;
    canvas.sortingOrder = SORTING_ORDER_BYOND_POPUP_PAGES;
}

change Image's Source Image

image.sprite = [your sprite]

c/c++ plugin Log

C# code:

using UnityEngine;
using System ;
using System.Collections;
using System.Runtime.InteropServices;

public class PluginTools : MonoBehaviour {

    #if UNITY_IPHONE || UNITY_XBOX360
    [DllImport ("__Internal")]
    #else
    [DllImport ("BR_Plugin")]
    #endif

    private static extern void SetDebugFunction( IntPtr fp );



    //[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    public delegate void MyDelegate(string str);

    [MonoPInvokeCallback(typeof(MyDelegate))]
    static void CallBackFunction(string str)
    {
        Debug.Log(":: " + str);
    }
        
    public static void Init () {
        MyDelegate callback_delegate = new MyDelegate( CallBackFunction );
        IntPtr intptr_delegate =
            Marshal.GetFunctionPointerForDelegate(callback_delegate);
        SetDebugFunction( intptr_delegate );
    }

}

c/c++ code

#include <string.h>
#include <stdio.h>

typedef void (*FuncPtr)( const char * );
FuncPtr _DebugFunc;

void SetDebugFunction(FuncPtr fp )
{
    _DebugFunc = fp;
}

for using:

typedef void (*FuncPtr)( const char * );
extern FuncPtr _DebugFunc;

#define DebugLog(  fmt, ... )    \
do { \
static char log_buf[1024] ; \
memset( log_buf , 0 , sizeof(log_buf)); \
sprintf(log_buf,  fmt, ##__VA_ARGS__); \
_DebugFunc( log_buf ); \
} while (0)

detect whether an object has been destroyed ?

bool bInvalidObj  = gameObject == null || gameObject.Equals(null)  || ReferenceEquals (gameObject, null);

ScrollView 实践

• scroll content
  • ScrollRect 组建中必须 设置 Content field, UGUI 创建的 scroll view 已自动设好
  • cell item 需要添加到 content 上 , as child
• content 上一般需要添加
  • Vertical/Horizontal Layout Group
    • 设置 Child Force Expand
  • Content Size Fitter ( 自动调整 content size )
    • 设置成 Preferred Size
• cell item
  • 添加 Layout Element

reset scroll rect content to original postion

scrollrect.content.anchoredPosition = Vector2.zero;

Dictionary iteration

foreach(KeyValuePair<EventSignal,EventManager.EventFunc> entry in myRegisterEvents )
{
    // to use entry.Key , entry.Value 
}
        

AES , encrypt by python, decrypt by c#

• Microsoft's implementation of PKCS7 is a bit different than Python's
• python rkcs7

# encrypt
from Crypto.Cipher import AES
from Crypto import Random
from pkcs7 import PKCS7Encoder

iv = Random.new().read(AES.block_size)
aes = AES.new(aes_key, AES.MODE_CBC, iv )
base_encrypt = aes.encrypt(PKCS7Encoder().encode( d.encode( "utf8" ) ))
encrypt_d = base64.b64encode( iv + base_encrypt   )

using System;
using System.IO;
using System.Security.Cryptography;

// c# decrypt
public String Decrypt_CBC_AES( string base64str, byte[] Key )
{
    byte[] _entireText = System.Convert.FromBase64String (base64str);

    byte[] IV = new byte[16];
    Array.Copy ( _entireText , IV, 16 );

    byte[] cipherText = new byte[ _entireText.Length - 16 ] ;
    Array.Copy (_entireText, 16, cipherText, 0 , cipherText.Length );
    _entireText = null;


    // defaults to CBC and PKCS7
    var aes = new AesManaged();
    aes.Key = Key;
    aes.IV = IV;

    var decryptor = aes.CreateDecryptor();
    var text_bytes = decryptor.TransformFinalBlock(cipherText, 0, cipherText.Length);

    //var text = textEncoder.GetString(text_bytes);
    return System.Text.UTF8Encoding.UTF8.GetString( text_bytes );

}

http request under proxy

1. do not use WWW , use WebClint instead
2. set https / http proxy in you environment
   • HTTPS_proxy , HTTP_proxy
   • be aware of the upper/lower case
3. start unity from Unity.app/Contents/MacOS/Unity , not by clicking Unity.app

convert Input.mouseposition to object local space

Vector2 localpoint;
RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform, Input.mousePosition, GetComponentInParent<Canvas>().worldCamera, out localpoint);
Vector2 normalizedPoint = Rect.PointToNormalized(rectTransform.rect, localpoint);

Debug.Log(normalizedPoint);