将twitter集成到iOS 5中，但保持与旧iOS的向后兼容性

Question

Been following this great tutorial on how to integrate twitter into your app. I know there are other ways that programmers have used to integrate twitter before iOS 5 but my question is this:

My app supports iOS 3.0+ so if I integrate twitter using just the iOS 5 way of doing it, how will this affect my users that aren't using iOS 5? Will it even work for them?

Thanks!

Answer 1

If you are OK by only making Twitter available for iOS 5 users, you can check if Twitter is available with this:

// Don't forget to import Twitter!
#import <Twitter/Twitter.h>
....
if([TWTweetComposeViewController class] != nil) {
    // your code here
}

Also, make sure that when adding the Twitter framework you set it as optional.

Answer 2

The official API framework wouldn't work unfortunately as the twitter app/integration is only available in iOS 5

A good solution is to use ShareKit , a free API that allows you to integrate twitter, facebook and other social network support.

Answer 3

You should look into DETweetComposeViewController . We built it just for this purpose. It is an iOS4 compatible re-implementation of the TWTweetComposeViewController.

Answer 4

Use weak linking and some code like the following:

 - (void)tweet
{
Class tweeterClass = NSClassFromString(@"TWTweetComposeViewController");

if(tweeterClass != nil) {   
    if([TWTweetComposeViewController canSendTweet]) {
        TWTweetComposeViewController *tweetViewController = [[TWTweetComposeViewController alloc] init];
        tweetViewController.completionHandler = ^(TWTweetComposeViewControllerResult result) {
            if(result == TWTweetComposeViewControllerResultDone) {

            }
            [self dismissViewControllerAnimated:YES completion:nil];
        };

        [self presentViewController:tweetViewController animated:YES completion:nil];
    } else {
#if !(TARGET_IPHONE_SIMULATOR)
        [self displayAlert:@"You can't send a tweet right now, make sure your device has an internet connection and you have at least one Twitter account setup."];
#else
        NSString *tweetString = [NSString stringWithFormat:@"http://mobile.twitter.com/home?status=%@%@", [self urlEncode:@"Check out this awesome pic: "] ,[self urlEncode:[_blobTweet.shortUrl absoluteString]]];
        NSURL *tweetURL = [NSURL URLWithString:tweetString];
        if ([[UIApplication sharedApplication] canOpenURL:tweetURL]) { 
            [[UIApplication sharedApplication] openURL:tweetURL]; 
        }
#endif
    }
} else {        
    // no Twitter integration could default to third-party Twitter framework

}
}

@end