Help people download the libstdc-6.0.9 library file.
真机路径: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.0.sdk/usr/lib 模拟器路径: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/usr/lib 替换完成后在模拟器iOS10.0以上运行会出现一个错误: Reason: no suitable image found. Did find: /usr/lib/libstdc++.6.dylib: mach-o, but not built for iOS simulator
这里还需要拷贝旧Xcode中的/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libstdc++.6.0.9.dylib并改名为libstdc++.6.dylib后粘贴到新Xcode同样的位置。(注意在/Profiles/Runtimes/iOS.simruntime这里时需要右键显示包内容)。