How do I customize a UIActivityViewController to show a URL link when posting to facebook and twitter?

Question

So I\'m trying out the new UIActivityViewController in iOS 6, and it\'s really easy to get up and running, but I can\'t figure out how to control it like I want

Answer 1

- (void)tweetURL:(NSString *)url title:(NSString *)title {
    TWTweetComposeViewController *twitter = [[TWTweetComposeViewController alloc] init];
    NSString *format = @"“%@” %@ /via @DesignSceneApp";
    NSString *message = [NSString stringWithFormat:format, title, url]
    NSUInteger idx = title.length;
    while (![twitter setInitialText:message]) {
        idx -= 5;
        if (idx > 5) {
            message = [NSString stringWithFormat:format,
                [NSString stringWithFormat:@"%@…", [title substringToIndex:idx]],
                url
            ];
        } else {
            // Give up on the title.
            message = [NSString stringWithFormat:@"%@ /via @DesignSceneApp", url];
            [twitter setInitialText:message];
            break;
        }
    }

    [self presentViewController:twitter animated:YES completion:nil];
}