ios unit test 工程选择release时候报错Undefined symbols for architecture i386

Undefined symbols for architecture i386:

"_OBJC_CLASS_$_ItemReturn", referenced from:

objc-class-ref in JenknisDemoTests.o

"_OBJC_CLASS_$_ViewController", referenced from:

objc-class-ref in ViewControllerTest.o

(maybe you meant: _OBJC_CLASS_$_ViewControllerTest)

ld: symbol(s) not found for architecture i386

clang: error: linker command failed with exit code 1 (use -v to see invocation)

解决方法： edit scheme，然后在build选项中找到对应出错的target，然后去掉run的勾选就可以了。