I am trying to implement Facebook in one of my apps and therefore followed the official Facebook Tutorial on Hackbook. https://developers.facebook.com/docs/howtos/login-with-facebook-using-ios-sdk/
I implemented everything as described and I don't get any error or warnings. However when I try to build the app, I get 17 Mach-O Linker Errors.
Undefined symbols for architecture i386:
"_FBSessionStateChangedNotification", referenced from:
-[ForeverMainViewController sessionStateChanged:state:error:] in ForeverMainViewController.o
"_sqlite3_bind_double", referenced from:
-[FBCacheIndex _updateEntryInDatabaseForKey:entry:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _writeEntryInDatabase:] in FacebookSDK(FBCacheIndex.o)
"_sqlite3_bind_int", referenced from:
-[FBCacheIndex _updateEntryInDatabaseForKey:entry:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _writeEntryInDatabase:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _trimDatabase] in FacebookSDK(FBCacheIndex.o)
"_sqlite3_bind_text", referenced from:
-[FBCacheIndex _updateEntryInDatabaseForKey:entry:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _writeEntryInDatabase:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _readEntryFromDatabase:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _removeEntryFromDatabaseForKey:] in FacebookSDK(FBCacheIndex.o)
"_sqlite3_close", referenced from:
___23-[FBCacheIndex dealloc]_block_invoke_0 in FacebookSDK(FBCacheIndex.o)
"_sqlite3_column_double", referenced from:
-[FBCacheIndex _readEntryFromDatabase:] in FacebookSDK(FBCacheIndex.o)
"_sqlite3_column_int", referenced from:
-[FBCacheIndex _readEntryFromDatabase:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _fetchCurrentDiskUsage] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _trimDatabase] in FacebookSDK(FBCacheIndex.o)
"_sqlite3_column_text", referenced from:
-[FBCacheIndex _readEntryFromDatabase:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _trimDatabase] in FacebookSDK(FBCacheIndex.o)
"_sqlite3_errmsg", referenced from:
_releaseStatement in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _updateEntryInDatabaseForKey:entry:] in FacebookSDK(FBCacheIndex.o)
_initializeStatement in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _writeEntryInDatabase:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _readEntryFromDatabase:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _fetchCurrentDiskUsage] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _removeEntryFromDatabaseForKey:] in FacebookSDK(FBCacheIndex.o)
...
"_sqlite3_exec", referenced from:
___36-[FBCacheIndex initWithCacheFolder:]_block_invoke_0 in FacebookSDK(FBCacheIndex.o)
"_sqlite3_finalize", referenced from:
_releaseStatement in FacebookSDK(FBCacheIndex.o)
"_sqlite3_open_v2", referenced from:
___36-[FBCacheIndex initWithCacheFolder:]_block_invoke_0 in FacebookSDK(FBCacheIndex.o)
"_sqlite3_prepare_v2", referenced from:
_initializeStatement in FacebookSDK(FBCacheIndex.o)
"_sqlite3_reset", referenced from:
_initializeStatement in FacebookSDK(FBCacheIndex.o)
"_sqlite3_step", referenced from:
-[FBCacheIndex _updateEntryInDatabaseForKey:entry:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _writeEntryInDatabase:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _readEntryFromDatabase:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _fetchCurrentDiskUsage] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _removeEntryFromDatabaseForKey:] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _dropTrimmingTable] in FacebookSDK(FBCacheIndex.o)
-[FBCacheIndex _trimDatabase] in FacebookSDK(FBCacheIndex.o)
...
ld: symbol(s) not found for architecture i386
After reimplementing, cleaning the app, making sure everything was there, I am out of ideas. I also implemented it in another app, but good the errors again. The given samples from Facebook however work as intended. I did various tipps on the internet, but none of them worked so far. Maybe someone here knows something about the API and has a good tip for me :)
I think you are missing this line
NSString *const FBSessionStateChangedNotification = @"FBSessionStateChangedNotification";
and adding reference to -lsqlite3.0
See https://developers.facebook.com/docs/getting-started/getting-started-with-the-ios-sdk/#project
I think your are missing this
Goto Project->BuildPhase->Link Binary-Add->-lsqlite3.0
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