You need to copy your database to your document folder first (also check if your sqlite file was properly added in the Copy Bundle Resources in Build Phases of your project setting):
//Where your original database file is
bundleDatabasePath = [[NSBundle mainBundle] pathForResource:@"stories_db" ofType:@"sqlite"];
//Where you will copy it in order to be used
documentDatabasePath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingString:@"/stories_db.sqlite"];
//Using the default file manager
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
//Copy empty database into document folder
if (![fileManager copyItemAtPath:bundleDatabasePath toPath:databasePath error:&error]) {
//Error
NSLog(@"Could not copy the database into document folder. Error:%@", error);
}
//Use DB
FMDatabase *db = [FMDatabase databaseWithPath:databasePath];