运行环境
Unity 5.3.5f1 (IL2CPP)编译IOS版本
XCode Version 7.2.1 (7C1002)
Mac OS X 10.11.3 (15D21) (Mac mini)
iPhone 5,6 ,iPad
错误信息
Could not produce class with ID
Could not produce class with ID XXX.
This could be caused by a class being stripped from the build even though it is needed. Try disabling ‘Strip Engine Code‘ in Player Settings.:<LoadWWWIEnumerator>c__Iterator99:MoveNext()
?
具体表现:可能是APP闪退,提示上示错误信息
解决办法
1. 在上面的错误提示中,有提示 disabling “Strip Engine Code”
所以我们要做的就是在Player Setting – Other Setting,去掉勾选 Strip Engine
如果要Strip Engine
如果要Strip Engine,那就需要把不想被strip的添加进来。
1. 新建link.xml放在Assets目录下,里面添加不想被strip的dll的名字
ID查询: https://docs.unity3d.com/Manual/ClassIDReference.html
下面是导入高通Vuforia之后,SDK中默认的link.xml的内容
<linker> <!-- The following assemblies contain namespaces that should be fully preserved even when assembly stripping is used. Not excluding the assemblies below from stripping can result in crashes or various exceptions. --> <assembly fullname="Vuforia.UnityExtensions"> <namespace fullname="Vuforia" preserve="all"/> </assembly> <assembly fullname="System"> <namespace fullname="System.Runtime.InteropServices" preserve="all"/> <namespace fullname="System.Collections.Generic;" preserve="all"/> <namespace fullname="System.Linq;" preserve="all"/> <namespace fullname="System.Text.RegularExpressions;" preserve="all"/> <namespace fullname="System.IO;" preserve="all"/> <namespace fullname="System;" preserve="all"/> </assembly> </linker>
如果提示的ID的是Editor的,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。
参考:https://forum.unity3d.com/threads/could-not-produce-class-with-id-91-ios.267548/
Unity的默认值
以Unity5.3.5为例
ios平台,默认勾选了 Strip Engine Code,且Script Background为I2CPP
android平台,默认disabled Strip Engine Code,且Script Background为Mono2x