apple mach-o链接器错误链接器命令失败，退出代码为1（使用-v查看调用）

Question

2 I am working with Objective C with core data, I got an error:

Apple Mach-O Linker Error, Linker command failed with exit code 1 (use -v to see invocation)

Answer 1

You need open detail description.

Answer 2

Check if you have imported a .m file instead if .h somewhere in your project.

Another thing to look for is the import of a header file twice.

If the above two don't work Select your project -> Build Phases -> Link Binary with Libraries. Go through the list and see if a framework is added more than once.

Answer 3

It's because the project inserted the core data's xcdatamodeld file in compile sources. Select your project -> Build Phases -> Compile Sources and delete projectName.xcdatamodeld file. Just try it and reply me if still any error.

Answer 4

导入.m文件而不是.h文件可能会导致此错误