iOS6 share action sheet

- (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];
}

http://stackoverflow.com/questions/13498459/how-to-display-the-default-ios-6-share-action-sheet-with-available-share-options