我正在使用iOS应用程序，我的客户要求其实施DFP和Google Analytics。
实施广告横幅非常简单，但当我添加Google Analytics需要的库时，xcode会显示28个错误。
当我删除-ObjC链接器标志时，错误消失了，但这样DPF实现将不起作用。
以下是错误，任何想法？
Undefined symbols for architecture x86_64:
"_NSOverwriteMergePolicy", referenced from:
+[TAGModel contextWithURL:] in libGoogleAnalyticsServices.a(TAGModel.o)
-[GAIDataStore contextWithModel:URL:] in libGoogleAnalyticsServices.a(GAIDataStore.o)
"_NSSQLiteErrorDomain", referenced from:
-[GAIDataStore performBlockAndWait:withError:] in libGoogleAnalyticsServices.a(GAIDataStore.o)
"_NSSQLiteStoreType", referenced from:
+[TAGModel coordinatorWithURL:] in libGoogleAnalyticsServices.a(TAGModel.o)
-[GAIDataStore coordinatorWithModel:URL:] in libGoogleAnalyticsServices.a(GAIDataStore.o)
"_OBJC_CLASS_$_NSAttributeDescription", referenced from:
objc-class-ref in libGoogleAnalyticsServices.a(TAGModel.o)
objc-class-ref in libGoogleAnalyticsServices.a(GAICoreDataUtil.o)
"_OBJC_CLASS_$_NSEntityDescription", referenced from:
objc-class-ref in libGoogleAnalyticsServices.a(TAGDataProvider.o)
objc-class-ref in libGoogleAnalyticsServices.a(TAGModel.o)
objc-class-ref in libGoogleAnalyticsServices.a(GAIDataStore.o)
objc-class-ref in libGoogleAnalyticsServices.a(GAICoreDataUtil.o)
"_OBJC_CLASS_$_NSFetchRequest", referenced from:
objc-class-ref in libGoogleAnalyticsServices.a(TAGModel.o)
objc-class-ref in libGoogleAnalyticsServices.a(GAIDataStore.o)
"_OBJC_CLASS_$_NSManagedObject", referenced from:
_OBJC_CLASS_$_TAGHit in libGoogleAnalyticsServices.a(TAGHit.o)
_OBJC_CLASS_$_GAIHit in libGoogleAnalyticsServices.a(GAIHit.o)
_OBJC_CLASS_$_GAIProperty in libGoogleAnalyticsServices.a(GAIProperty.o)
"_OBJC_CLASS_$_NSManagedObjectContext", referenced from:
objc-class-ref in libGoogleAnalyticsServices.a(TAGModel.o)
objc-class-ref in libGoogleAnalyticsServices.a(GAIDataStore.o)
"_OBJC_CLASS_$_NSManagedObjectModel", referenced from:
objc-class-ref in libGoogleAnalyticsServices.a(TAGModel.o)
objc-class-ref in libGoogleAnalyticsServices.a(GAICoreDataUtil.o)
"_OBJC_CLASS_$_NSPersistentStoreCoordinator", referenced from:
objc-class-ref in libGoogleAnalyticsServices.a(TAGModel.o)
objc-class-ref in libGoogleAnalyticsServices.a(GAIDataStore.o)
"_OBJC_METACLASS_$_NSManagedObject", referenced from:
_OBJC_METACLASS_$_TAGHit in libGoogleAnalyticsServices.a(TAGHit.o)
_OBJC_METACLASS_$_GAIHit in libGoogleAnalyticsServices.a(GAIHit.o)
_OBJC_METACLASS_$_GAIProperty in libGoogleAnalyticsServices.a(GAIProperty.o)
"_sqlite3_bind_blob", referenced from:
-[TAGDataLayerPersistentStoreImpl writeEntriesToDatabase:expireTime:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_bind_int", referenced from:
-[TAGDataLayerPersistentStoreImpl deleteEntries:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_bind_int64", referenced from:
-[TAGDataLayerPersistentStoreImpl writeEntriesToDatabase:expireTime:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl peekEntryIds:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl deleteEntriesOlderThan:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_bind_text", referenced from:
-[TAGDataLayerPersistentStoreImpl clearKeysWithPrefixSingleThreaded:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl writeEntriesToDatabase:expireTime:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_close", referenced from:
-[TAGDataLayerPersistentStoreImpl closeDatabase] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_column_blob", referenced from:
-[TAGDataLayerPersistentStoreImpl loadSerialized] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_column_bytes", referenced from:
-[TAGDataLayerPersistentStoreImpl loadSerialized] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_column_int64", referenced from:
-[TAGDataLayerPersistentStoreImpl peekEntryIds:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl numStoredEntries] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_column_text", referenced from:
-[TAGDataLayerPersistentStoreImpl loadSerialized] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_errcode", referenced from:
-[TAGDataLayerPersistentStoreImpl prepareSql:description:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_errmsg", referenced from:
-[TAGDataLayerPersistentStoreImpl clearKeysWithPrefixSingleThreaded:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl writeEntriesToDatabase:expireTime:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl deleteEntries:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl numStoredEntries] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl deleteEntriesOlderThan:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl tablePresent:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl openDatabaseAndInitStatements] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
...
"_sqlite3_finalize", referenced from:
-[TAGDataLayerPersistentStoreImpl clearKeysWithPrefixSingleThreaded:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl deleteEntries:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl tablePresent:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl openDatabaseAndInitStatements] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl closeDatabase] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_open", referenced from:
-[TAGDataLayerPersistentStoreImpl openDatabaseAndInitStatements] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_prepare_v2", referenced from:
-[TAGDataLayerPersistentStoreImpl prepareSql:description:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_reset", referenced from:
-[TAGDataLayerPersistentStoreImpl loadSerialized] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl writeEntriesToDatabase:expireTime:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl peekEntryIds:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl numStoredEntries] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl deleteEntriesOlderThan:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
"_sqlite3_step", referenced from:
-[TAGDataLayerPersistentStoreImpl clearKeysWithPrefixSingleThreaded:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl loadSerialized] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl writeEntriesToDatabase:expireTime:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl deleteEntries:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl peekEntryIds:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl numStoredEntries] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
-[TAGDataLayerPersistentStoreImpl deleteEntriesOlderThan:] in libGoogleAnalyticsServices.a(TAGDataLayerPersistentStoreImpl.o)
...
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)