错误：
Undefined symbols for architecture armv7:
"_LCHeaderFieldNameSign", referenced from:
-[AVOSCloudCrashReporting enableCrashReportingWithApplicationId:clientKey:] in libAVOSCloudCrashReporting.a(AVOSCloudCrashReporting.o)
"_LCHeaderFieldNameId", referenced from:
-[AVOSCloudCrashReporting enableCrashReportingWithApplicationId:clientKey:] in libAVOSCloudCrashReporting.a(AVOSCloudCrashReporting.o)
ld: symbol(s) not found for architecture armv7
请教各位有没有出现类似错误的？怎么解决？