UE4 Windows 远程编译 IOS 若干问题
问题一
ssh_exchange_identification: Connection closed by remote host
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at /home/lapo/packaging/rsync-3.0.4-1/src/rsync-3.0.4/io.c(632) [sender=3.0.4]
解决方法
首先保证远程机器 OSX 上的 ssh 并发数配置足够，使用命令查看
grep MaxStartups /etc/ssh/sshd_config
一般输出如下格式 10/20/30 意思是连接达到10之后以20%的概率拒绝新连接直到30为止，可以根据需求调大第一个值并重启
其次保证 RemoteToolChainPrivate.key 文件存在于 C:\Users\用户名\AppData\Roaming\Unreal Engine\UnrealBuildTool\SSHKeys\远程机器地址\mac 文件夹下，没有的话需要在 Edit -> Project Settings... -> Platforms -> iOS -> Build 中进行配置，配置好远程 OSX 机器的地址，用户名，然后点击 Generate SSH Key 生成
问题二
编译失败，出现如下错误
clang: error: argument unused during compilation: '-fno-objc-exceptions' [-Werror,-Wunused-command-line-argument]
解决方法
修改 Engine\Source\Programs\UnrealBuildTool\Platform\IOS\IOSToolChain.cs 文件，在 GetCompileArguments_Global 函数中增加 Result += " -Wno-unused-command-line-argument"; 禁用这个错误警告
问题三
出 Shipping 包出现链接错误，如下
ld: bitcode bundle could not be generated because '/Users/mac/UE4/Builds/xxx/Engine/Source/ThirdParty/PLCrashReporter/plcrashreporter-master-5ae3b0a/IOS/Release/libCrashReporter-iphoneos.a(libCrashReporter-iphoneos.a-arm64-master.o)' was built without full bitcode. All object files and libraries for bitcode must be generated from Xcode Archive or Install build for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
解决方法
目前的解决方法是在 Edit -> Project Settings... -> Platforms -> iOS -> Build 中取消 Support bitcode in Shipping
问题四
IPA 打包失败，错误如下
IPP ERROR: Application exception: System.Security.Cryptography.CryptographicException ...
解决方法
Edit -> Project Settings... -> Platforms -> iOS -> Mobile Provision 中添加描述文件和证书，或者直接打开 Engine\Binaries\DotNET\IOS\IPhonePackager.exe 进行添加
描述文件和证书生成见官方文档