网上有很多类似的解决方法，但每个人的项目不同，配置不同，因人而异。
搜索了一大堆还是未能解决自己的问题，所以做出以下记录，希望和我一样的小白少走弯路！
桌面Command + Shift + G
前往.png
输入下面三个路径
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/
xcode11
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/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/
依次插入libstdc++文件,打开项目，真机模拟器都可以运行！
