当我添加Google Analytics库时,出现了这个警告
Undefined symbols for architecture armv7:
"_OBJC_CLASS_$_NSAttributeDescription", referenced from:
objc-class-ref in libGoogleAnalytics.a(GAICoreDataUtil.o)
objc-class-ref in libGoogleAnalytics_debug.a(GAICoreDataUtil.o)
"_OBJC_CLASS_$_NSFetchRequest", referenced from:
objc-class-ref in libGoogleAnalytics.a(GAIDataStore.o)
objc-class-ref in libGoogleAnalytics_debug.a(GAIDataStore.o)
"_NSSQLiteErrorDomain", referenced from:
l003 in libGoogleAnalytics.a(GAIDataStore.o)
请帮助我