Xcode 10 、Xcode11 ‘string’ file not found C++头文件、`libstdc++6.0.9.tbd`库缺失问题

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Xcode10 ‘string’ file not found C 头文件缺失问题
将对应文件拷贝到Xcode10对应目录下
**真机： **/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/c
模拟器：
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/include/c
Xcode9 C 头文件github链接：https://github.com/DeCori/Xcode9-cpp.git
Xcode10中缺少的libstdc 6.0.9.tbd库
其中文件夹 1、2、3、4 中的文件分别对应复制到Xcode10中的以下4个目录中即可：

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/

Xcode11路径：
Xcode11文件1路径发生改变

1/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib