entry point (_main) undefined. for architecture x86_64

报错如下:

“ld: entry point (_main) undefined. for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)”

解决办法:

1. Select your Project
2. Go to Target -> Select your Test target
3. then go to Build Setting -> Search Mach-O Type
4. Change to -> Bundle

good luck!