Importing documents in iOS application

MYAppDelegate.m

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url 
  sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
    if (url != nil && [url isFileURL]) {
        NSError *error;
        [[MYFileManager sharedInstance] importAttachment:url.path error:&error];
        
        if (error != nil) {
            [[MYAlertDisplayer sharedInstance]
             displayAlert:@"Error" withMessage:@"Failed to import file"];
        } else {
            [[MYAlertDisplayer sharedInstance]
             displayAlert:@"Success" withMessage:@"File was successfully imported"];
        }
    }
    return YES;
}