2016-03-30

Unity3d导出Xcode工程问题总结

文章主要总结了在Unity3d生成Xcode工程的过程中遇到的问题，希望对遇到问题的小伙伴有帮助。

Failed to load package manager

错误描述
Failed to load package manager
UnityEditor.HostView:OnGUI()
原因分析
主要是Unity破解的时候，license使用的不正确。
例如，下载的Unity版本是5.2.4，但是使用了5.2.3的license。如果在电脑上使用没有问题。但是当打包的时候就会出错。
参考文档
Failed to load package manager

DXT3 compressed textures are not supported when publishing to iPhone

错误描述
DXT3 compressed textures are not supported when publishing to iPhone
Assets/SceneLevel/Model/xuedi/Materials/xd_toushiche.dds
Included from scene:
UnityEditor.HostView:OnGUI()
原因分析
主要是由于Iphone不支持DDS造成的。
参考文档
- 首先要明白什么是DDS——DDS百度百科
- 另外可以使用转码工具来对DDS格式的贴图进行转码——转码网站

`xlv_TEXCOORD2’ redeclared

错误描述
Shader error in ‘Particles/Additive(clipping)’: `xlv_TEXCOORD2’ redeclared at line 80 (on metal)
原因分析
在shader中进行了重复定义。
出现此问题的shader为 Particle Add Clipping.shader
主要问题在于以下代码
```
#ifdef SOFTPARTICLES_ON
float4 projPos : TEXCOORD2;
#endif
//------------------add---------------------------------
float3 vpos:TEXCOORD2;
//------------------add---------------------------------
```
主要由于在IOS设备上，支持 SOFTPARTICLES_ON，所以导致了重复定义。

System.Web.Extensions.dll could not be loaded

错误描述

Failed running /Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStripper2/UnusedBytecodeStripper2.exe -out
Unhandled Exception: System.Reflection.ReflectionTypeLoadException: The classes in the module cannot be loaded.
at (wrapper managed-to-native) System.Reflection.Assembly:GetTypes (bool)
at System.Reflection.Assembly.GetTypes () [0x00000] in <filename unknown>:0 
at Mono.CSharp.RootNamespace.ComputeNamespaces (System.Reflection.Assembly assembly, System.Type extensionType) [0x00000] in <filename unknown>:0 
at Mono.CSharp.RootNamespace.ComputeNamespace (Mono.CSharp.CompilerContext ctx, System.Type extensionType) [0x00000] in <filename unknown>:0 
at Mono.CSharp.GlobalRootNamespace.ComputeNamespaces (Mono.CSharp.CompilerContext ctx) [0x00000] in <filename unknown>:0 
at Mono.CSharp.Driver.LoadReferences () [0x00000] in <filename unknown>:0 
at Mono.CSharp.Driver.Compile () [0x00000] in <filename unknown>:0 
at Mono.CSharp.Driver.Main (System.String[] args) [0x00000] in <filename unknown>:0 
The following assembly referenced from /Users/r1/Documents/client/Assets/Plugins/System.Web.Extensions.dll could not be loaded:
Assembly:   System.Web(assemblyref_index=2)
Version:2.0.0.0
Public Key: b03f5f7f11d50a3a
The assembly was not found in the Global Assembly Cache, a path listed in the MONO_PATH environment variable, or in the location of the executing assembly (/Users/r1/Documents/client/Assets/Plugins/).
Could not load file or assembly 'System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies.
Missing method .ctor in assembly /Users/r1/Documents/client/Assets/Plugins/System.Web.Extensions.dll, type System.Web.UI.WebResourceAttribute
Can't find custom attr constructor image: /Users/r1/Documents/client/Assets/Plugins/System.Web.Extensions.dll mtoken: 0x0a000011

原因分析
The following assembly referenced from /Users/r1/Documents/client/Assets/Plugins/System.Web.Extensions.dll
报错原因是在plugin中有个dll被应用，但是目前不支持web。
当在编辑器中转换平台之后，就不会报这个错误了。
也就是并不需要必须将这个System.Web.Extensions.dll 删除

Mono.Cecil.ResolutionException: Failed to resolve System.Web.AspNetHostingPermissionLevel

错误描述

Failed running /Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStripper2/UnusedBytecodeStripper2.exe
 -out "/Users/r1/Documents/client/Temp/StagingArea/Data/Managed/tempStrip"
 -l none -c link
 -x "/Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStripper/native_link.xml"
 -f "/Applications/Unity/Unity.app/Contents/Frameworks/il2cpp/LinkerDescriptors"
 -x "/Users/r1/Documents/client/Temp/StagingArea/Data/Managed/../platform_native_link.xml"
 -x "/Users/r1/Documents/client/Temp/StagingArea/Data/methods_pointedto_by_uievents.xml"
 -x "/Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStripper/Animation.xml"
 -x "/Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStripper/Audio.xml"
 -x "/Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStripper/IMGUI.xml"
 -x "/Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStripper/Physics.xml"
 -x "/Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStripper/Physics2D.xml"
 -x "/Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStripper/TextRendering.xml"
 -x "/Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStripper/UI.xml"
 -x "/Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStrippernk.xml"
 -x "/Applications/Unity/Unity.app/Contents/Frameworks/Tools/UnusedByteCodeStripper/native_link.xml"
 -x "/Users/r1/Documents/client/Assets/Scripts/AStarScriptnk.xml"
 -d "/Users/r1/Documents/client/Temp/StagingArea/Data/Managed"
 -a  "/Users/r1/Documents/client/Temp/StagingArea/Data/Managed/Assembly-CSharp-firstpass.dll"
 -a  "/Users/r1/Documents/client/Temp/StagingArea/Data/Managed/Assembly-CSharp.dll"
 -a  "/Users/r1/Documents/client/Temp/StagingArea/Data/Managed/Assembly-UnityScript-firstpass.dll"
 -a  "/Users/r1/Documents/client/Temp/StagingArea/Data/Managed/Assembly-UnityScript.dll"
 -a  "/Users/r1/Documents/client/Temp/StagingArea/Data/Managed/UnityEngine.UI.dll"

stdout:
SweepReport:
System.MonoType => Mono.Cecil.TypeDefinitionMono.Cecil.TypeDefinitionMono.Cecil.TypeDefinitionMono.Cecil.TypeDefinitionMono.Cecil.TypeDefinition
Mono.Cecil.MethodDefinition => System.Boolean System.EnterpriseServices.IConfigurationAttribute.AfterSaveChanges(System.Collections.Hashtable)System.Boolean System.EnterpriseServices.IConfigurationAttribute.Apply(System.Collections.Hashtable)System.Boolean System.EnterpriseServices.IConfigurationAttribute.IsValidTarget(System.String)System.Guid get_Value()System.Boolean System.EnterpriseServices.IConfigurationAttribute.AfterSaveChanges(System.Collections.Hashtable)
Mono.Cecil.FieldDefinition => System.String LiteralFalseSystem.String LiteralTrueSystem.String LiteralNullSystem.String LiteralUndefinedSystem.String LiteralNotANumber
Fatal error in Mono CIL Linker
Mono.Cecil.ResolutionException: Failed to resolve System.Web.AspNetHostingPermissionLevel
  at Mono.Cecil.Mixin.CheckedResolve (Mono.Cecil.TypeReference self) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.SignatureReader.ReadCustomAttributeEnum (Mono.Cecil.TypeReference enum_type) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.SignatureReader.ReadCustomAttributeElementValue (Mono.Cecil.TypeReference type) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.SignatureReader.ReadCustomAttributeElement (Mono.Cecil.TypeReference type) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.SignatureReader.ReadCustomAttributeFixedArgument (Mono.Cecil.TypeReference type) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.SignatureReader.ReadCustomAttributeNamedArgument (Mono.Collections.Generic.Collection`1& fields, Mono.Collections.Generic.Collection`1& properties) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.SignatureReader.ReadCustomAttributeNamedArguments (UInt16 count, Mono.Collections.Generic.Collection`1& fields, Mono.Collections.Generic.Collection`1& properties) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.SignatureReader.ReadSecurityAttribute () [0x00000] in <filename unknown>:0 
at Mono.Cecil.MetadataReader.ReadSecurityDeclarationSignature (Mono.Cecil.SecurityDeclaration declaration) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.SecurityDeclaration.<Resolve>b__2 (Mono.Cecil.SecurityDeclaration declaration, Mono.Cecil.MetadataReader reader) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.ModuleDefinition.Read[SecurityDeclaration,SecurityDeclaration] (Mono.Cecil.SecurityDeclaration item, System.Func`3 read) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.SecurityDeclaration.Resolve () [0x00000] in <filename unknown>:0 
  at Mono.Cecil.SecurityDeclaration.get_SecurityAttributes () [0x00000] in <filename unknown>:0 
  at Mono.Cecil.ImmediateModuleReader.ReadSecurityDeclarations (ISecurityDeclarationProvider provider) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.ImmediateModuleReader.ReadType (Mono.Cecil.TypeDefinition type) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.ImmediateModuleReader.ReadTypes (Mono.Collections.Generic.Collection`1 types) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.ImmediateModuleReader.ReadModule (Mono.Cecil.ModuleDefinition module) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.ModuleWriter.WriteModuleTo (Mono.Cecil.ModuleDefinition module, System.IO.Stream stream, Mono.Cecil.WriterParameters parameters) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.ModuleDefinition.Write (System.IO.Stream stream, Mono.Cecil.WriterParameters parameters) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.ModuleDefinition.Write (System.String fileName, Mono.Cecil.WriterParameters parameters) [0x00000] in <filename unknown>:0 
  at Mono.Cecil.AssemblyDefinition.Write (System.String fileName, Mono.Cecil.WriterParameters parameters) [0x00000] in <filename unknown>:0 
  at Mono.Linker.Steps.OutputStep.OutputAssembly (Mono.Cecil.AssemblyDefinition assembly) [0x00000] in <filename unknown>:0 
  at Mono.Linker.Steps.OutputStep.ProcessAssembly (Mono.Cecil.AssemblyDefinition assembly) [0x00000] in <filename unknown>:0 
  at Mono.Linker.Steps.BaseStep.Process (Mono.Linker.LinkContext context) [0x00000] in <filename unknown>:0 
  at Mono.Linker.Pipeline.Process (Mono.Linker.LinkContext context) [0x00000] in <filename unknown>:0 
  at Mono.Linker.Driver.Run () [0x00000] in <filename unknown>:0 
  at Mono.Linker.Driver.RunDriverWithErrorHandling (Mono.Linker.Driver driver) [0x00000] in <filename unknown>:0 
  at Mono.Linker.Driver.RunDriver (Mono.Linker.Driver driver) [0x00000] in <filename unknown>:0 
stderr:

UnityEngine.Debug:LogError(Object)
UnityEditorInternal.Runner:RunManagedProgram(String, String, String, CompilerOutputParserBase) (at /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:68)
UnityEditorInternal.AssemblyStripper:RunAssemblyLinker(IEnumerable`1, String&, String&, String, String) (at /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:199)
UnityEditorInternal.AssemblyStripper:StripAssembliesTo(String, String, String&, String&, String, String, IEnumerable`1) (at /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:192)
UnityEditorInternal.AssemblyStripper:Strip(String, String, String&, String&, String, String, IEnumerable`1) (at /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:143)
UnityEditorInternal.AssemblyStripper:Strip(String[], String[], String, String, String&, String&, String, String, IEnumerable`1) (at /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:123)
UnityEditorInternal.IL2CPPBuilder:RunAssemblyStripper(IEnumerable, String, String[], String[], String) (at /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:465)
UnityEditorInternal.IL2CPPBuilder:StripAssemblies(IEnumerable`1, String) (at /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:438)
UnityEditorInternal.IL2CPPBuilder:Run() (at /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:299)
UnityEditorInternal.IL2CPPUtils:RunIl2Cpp(String, String, IIl2CppPlatformProvider, Action`1, RuntimeClassRegistry) (at /Users/builduser/buildslave/unity/build/Editor/Mono/BuildPipeline/Il2Cpp/IL2CPPUtils.cs:218)
UnityEditor.PostprocessBuildPlayer:Postprocess(BuildTarget, String, String, String, Int32, Int32, String, String, BuildOptions, RuntimeClassRegistry)

原因分析
- 主要问题在于“Mono.Cecil.ResolutionException: Failed to resolve System.Web.AspNetHostingPermissionLevel”
  这个问题在于，程序中需要用到“System.Web.AspNetHostingPermissionLevel” 这个类，但是当前的Spripting Backend 与 Stripping Level 决定了这个类会被剥离。
  那我们要做的就是要对其进行保护，在编译成C++的时候，不对他进行剥离操作。
  所以在我们link.xml中设置对其进行保护。
- 为什么IOS要这么设置呢？
  在android平台下，Spripting Backend设置为Mono2x，Stripping Level设置为Disable，Api Compatiblity Level设置为.NET 2.0。也就是说android平台下使用了整个.NET2.0框架中的类，并且没有做任何剥离操作。
  但是在ios平台下，Spripting Backend设置为IL2CPP，这种编译形式相当于Stripping Level设置为Strip Byte Code。这种剥离等级下，就会将“System.Web.AspNetHostingPermissionLevel”进行剥离，所以我们要在link.xml中对其进行保护。
参考文档
- 开始怀疑是dll出现问题，参考删除对应dll来解决。
  但是经过测试dll没有问题，所以此中解决办法搁置。
- 这个涉及到IL2CPP的概念。参考什么是IL2CPP
- 怎么理解剥离力度。参考 Unity3D占用内存太大的解决方法
- 怎么理解link.xml 什么是link.xml
- 参考 Please help for IL2CPP problem
- 参考官方文档
- NET2.0与NET2.0 sub Mono Compatibility

IOS贴图解决

问题描述
打包iOS之后，多个图集中的图片错位，显示模糊。
原因分析
说明一：
首先IOS压缩的方式为 RGBA Compressed PVRET 4 bits。但是前提要求是压缩的图集的宽高比是1，也就是为正方形。
“纹理在导入时将被缩放到最近的幂大小。例如257x511纹理将成为256x512。请注意，PVRTC格式要求纹理是正方形（宽度与高度相等），因此最终大小将变换到512x512。 PVRTC是一种有损的纹理压缩技术，主要用于iPhone，iPod touch和iPad。”
所以如果要使用PVRET压缩方式的话，只能将图集打成正方形的。
在iOS平台下，默认的压缩格式也是这个格式。
说明二：
当使用 RGBA Compressed PVRET 4 bits 压缩方式的话，会发现图片失真。
最优的解决方案是出将一张图拆分为两张图，一张只带有RGB信息，一张带有alpha通道信息。
因为带有alpha通道的这张图包含的信息较少，所以可以将这张图进行压缩。这样既能够减少包体大小，也能够减少占用的内存。
说明三
现在android平台下用到的压缩格式为 RGBA Compressed ETC2 8 bits。
如果单纯带有纯透明的通道的图片，可以选择 RGB + 1-bit Alpha Compressed ETC2 4 bits。
这种压缩模式能够让图片的大小缩小一半。
参考文档
- To nearest 到最近的
- 所以最解决方案是：如果现在的图集是正方形的，则使用ios的格式进行压缩（默认已经用这种格式压缩）。
  如果图集不是正方形的，则目前先不对其进行压缩处理。
  一些非图集的Texture，则选择To nearest进行压缩。Only POT texture can be compressed to PVRTC format
- Sprite (2D and UI)
- 移动设备的纹理压缩方案

there are no graphs in the scene

问题描述

Caught exception while deserializing data.
System.MissingMethodException: Method not found: 'Default constructor not found...ctor() of System.ComponentModel.UInt32Converter'.
at System.Activator.CreateInstance (System.Type type, Boolean nonPublic) [0x00000] in :0 
at System.Activator.CreateInstance (System.Type type) [0x00000] in :0 
at System.ComponentModel.TypeDescriptor.GetConverter (System.Type type) [0x00000] in :0 
at Pathfinding.Serialization.JsonFx.TypeCoercionUtility.CoerceType (System.Type targetType, System.Object value) [0x00000] in :0 
at Pathfinding.Serialization.JsonFx.JsonReader.ReadNumber (System.Type expectedType) [0x00000] in :0 
at Pathfinding.Serialization.JsonFx.JsonReader.Read (System.Type expectedType, Boolean typeIsHint) [0x00000] in :0 
at Pathfinding.Serialization.JsonFx.JsonReader.PopulateObject (System.Object& result, System.Type objectType, System.Collections.Generic.Dictionary`2 memberMap, System.Type genericDictionaryType) [0x00000] in :0 
at Pathfinding.Serialization.JsonFx.JsonReader.PopulateObject (System.Object& obj) [0x00000] in :0 
at Pathfinding.Serialization.JsonFx.JsonReader.PopulateObject[NavGraph] (Pathfinding.NavGraph& obj) [0x00000] in :0 
at Pathfinding.Serialization.AstarSerializer.DeserializeGraphs () [0x00000] in :0 
at Pathfinding.AstarData.DeserializeGraphsPart (Pathfinding.Serialization.AstarSerializer sr) [0x00000] in :0 
at Pathfinding.AstarData.DeserializeGraphs (System.Byte[] bytes) [0x00000] in :0
(Filename: /Applications/buildAgent/work/aeedb04a1292f85a/artifacts/iPhonePlayer-armv7Generated/UnityEngineDebug.cpp Line: 49)

原因分析
“System.ComponentModel.UInt32Converter”在ios当前的编译方式与打包等级的情况下，被剥离了。所以也要在link.xml中对其进行保护
参考文档
- “there are no graphs in the scene” on iOS without disabling stripping
- 官方文档

本文标题:Unity3d导出Xcode工程问题总结

文章作者:青春代码

发布时间:2016年03月30日 - 22时33分

最后更新:2016年04月10日 - 20时25分

原始链接:http://zh19900207.github.io/2016/03/30/IOS打包问题2——unity编译Xcode工程/

许可协议: "署名-非商用-相同方式共享 3.0" 转载请保留原文链接及作者。