Is it possible to write new file to bundle resource directory in iOS app?
Or you can copy the resources needed and then operate on files with writing permission.
NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir = dirPaths[0];
NSString *databasePath = [documentsDir stringByAppendingString:@"/TwigitDatabase.db"];
NSFileManager *fm = [NSFileManager defaultManager];
if(![fm fileExistsAtPath:databasePath]) { // Checking whether the my database was copied earlier, though it could be saved in some preferences property.
NSError *error;
NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"TwigitDatabase" ofType:@"db"];
[[NSFileManager defaultManager] copyItemAtPath:soundFilePath toPath:databasePath error:&error];
NSLog(@"%@", error);
}