1在build Settings->Apple LLVM7.1 -Language->Compile Sources As 设置成 ObObjective-C++
2.在build Settings->Apple LLVM7.1 -Language-C++->C++ Language Dialect 设置成 Compiler Default
3.在build Settings->Apple LLVM7.1 -Language-C++->C++ Standard Libraryt 设置成 Compiler Default
如果丢.a文件,在build Settings->Seatch Paths->Header Search Paths 下添加.a文件路径。