Undefined symbols for architecture armv7:
"__PressButton1", referenced from:
RegisterMonoModules() in RegisterMonoModules.o
"__PressButton0", referenced from:
RegisterMonoModules() in RegisterMonoModules.o
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
求助 要怎么解决啊?