适用于<iOS 5的Twitter和Facebook API

Question

我一直在想，是否有可能使用新的iOS版本内置的新Twitter和Facebook框架发布应用程序，但仍然能够部署到较旧的iOS版本，是否有办法禁用该框架？ iOS版本不正确？

Answer 1

In iOS 6 you can integrate both pretty easily like this. Example

- (IBAction)Facebook:(id)sender
{

    if([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook]) {

        SLComposeViewController *controller = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];

        SLComposeViewControllerCompletionHandler myBlock = ^(SLComposeViewControllerResult result){
            if (result == SLComposeViewControllerResultCancelled) {

                NSLog(@"Cancelled");

            } else

            {
                NSLog(@"Done");
            }

            [controller dismissViewControllerAnimated:YES completion:Nil];
        };
        controller.completionHandler =myBlock;

        [controller setInitialText:@""];

        [self presentViewController:controller animated:YES completion:Nil];
    }
}

Answer 2

You can release an app using Twitter and Facebook but you need to always check the iOS version of the device your app is running on before calling the APIs. Your app will be without these features in older iOS versions.

It's not such a bad idea to cover iOS 5.0 and higher as in June 2012 Apple stated that more than 80% of the devices had iOS 5. You can see it at min 69' in this keynote .

For the list of devices and supported iOS version, you can read this .

Answer 3

I recommend you use the Facebook SDK for iOS which provides a level of abstraction over the OS support.

If configured correctly (for example, marking new frameworks as optional as per here ) this will run on older versions of the OS and will fallback to alternative FB authentication methods, such as via the FB app or a webview, when required.