Question

I need to implement sharing functionality for at least facebook, tweeter and email.
I am using Xcode 4.5. I found Sharekit and when add classes into project got ARC errors.

Answer 1

UIActivityViewController new in iOS 6 does this for you. You simply specify input text/image and present the controller, and you can share to Facebook, Twitter, Email, SMS, etc…

Quoting this tutorial:

- (IBAction)sendPost:(id)sender {
    NSArray *activityItems;

    if (_postImage.image != nil) {
        activityItems = @[_postText.text, _postImage.image];
    } else {
        activityItems = @[_postText.text];
    }

    UIActivityViewController *activityController =
                    [[UIActivityViewController alloc]
                    initWithActivityItems:activityItems
                    applicationActivities:nil];

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