pop.m

- (void)previewingContext:(id<UIViewControllerPreviewing>)previewingContext 
     commitViewController:(UIViewController *)viewControllerToCommit
{
    // get the peek controller (on screen currently)
    HNTMemberPeekViewController *peekController = (HNTMemberPeekViewController *)viewControllerToCommit;
    // get its data object
    HNMemberLite *memberLite = peekController.memberLite;

    // handle it as you'd handle normal cell tap action
    [self memberAction:memberLite];
}