ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code...

ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation)
问题1：我在项目项目链接了arm64的动态库，但是工程包含了arm7
解决1：在 Build Setting 中，搜索 architecture ，找到 Valid Architectures 只留下arm64和arm64e,
搜索 Other Linker Flags 增加 -lz或－ObjC。