升级Xcode10、Xcode11, 报错 library not found for -libstdc++.6.0.9
解决办法:设备将tbd副本放到下面路径中:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/模拟器将tdb副本放到下面路径中:/Applications/Xcode.app/Contents/Developer/Platforms/iP