解决dyld: Symbol not found: __ZNSs

1.xcode搜索__ZNSs4_Rep20_S_empty_rep_storageE显示是libstdc++.6.0.9tbd相关问题

2.真机添加libstdc++.6.0.9tbd

路径:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/