在导入flurry统计库时，运行有如下错误：
Undefined symbols for architecture i386:
"_SecItemAdd", referenced from:
-[FlurryKeychainWrapper setData:forKey:] in libFlurry.a(libFlurry.a-i386-master.o)
"_SecItemCopyMatching", referenced from:
-[FlurryKeychainWrapper dataForKey:] in libFlurry.a(libFlurry.a-i386-master.o)
"_SecItemDelete", referenced from:
......
解决方法：
导入Security.frameWork库，问题就解决了
