Undefined symbols for architecture x86_64:
"_OBJC_CLASS_$_GAI", referenced from:
__TMaCSo3GAI in Helper.o
"_kGAIHitType", referenced from:
__TZFC9RubyChina6Helper9trackViewfMS0_FPSs9AnyObject_T_ in Helper.o
"_kGAIScreenName", referenced from:
__TZFC9RubyChina6Helper9trackViewfMS0_FPSs9AnyObject_T_ in Helper.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
我pod install完成后, 运行报下面的错误