问题一：正式版Xcode10运行libstdc++报错处理
需要将Xcode9的文件拷入到相应的Xcode10中
复制到下述四个路径下，才能保证模拟器和真机均好用
拷贝文件夹1：
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/
拷贝文件夹2：
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/
拷贝文件夹3：
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/
拷贝文件夹4：
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/
问题二：正式版Xcode10运行找不到C++头文件报错处理
需要将Xcode9的文件拷入到相应的Xcode10中
复制到下述两个路径下，才能保证模拟器和真机均好用
真机
拷贝文件夹5：
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/c++
模拟器：
拷贝文件夹6：
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/include/c++
附：上述文件下载地址