How to hide parent tabbar when pushing controller in navigationController

Question

I have an application with a tab bar controller and each view contains a navigation controller. My MainWindow looks as follows: Image here http://www.freeimagehosting.net/im

Answer 1

for swift 3,write the same code by you unhide the tabbar before pushviewController code like below

   var frame = self.tabBarController?.tabBar.frame
    frame?.origin.y = self.view.frame.size.height - (frame?.size.height)!+112
    UIView.animate(withDuration: 0.2, animations: {
        self.tabBarController?.tabBar.frame = frame!
    })
    self.navigationController?.pushViewController(viewController, animated: true)

or use just whant to unhide the tabbar u can use

  viewController.hidesBottomBarWhenPushed = false