How to hide and show tab bar and Increase and decrease tableView height?

I have a UITabBarController and I added a view controller. In my UIViewController I have a UITableView.

My requirement is whenever I will scroll down tableView then Tab bar should be hidden and TableView should come at full screen and when I scroll tableView up then TabBar should not be hidden.

Here is my story-board screen shots:

In Images you can see I have taken tableView and tabBar. And also TableView height I have to show full when TabBar will be hidden.

Here is my code:

//Change Tab bar func changeTabBar(hidden:Bool, animated: Bool){ let tabBar = self.tabBarController?.tabBar if tabBar!.isHidden == hidden{ return } let frame = tabBar?.frame let offset = (hidden ? (frame?.size.height)! : -(frame?.size.height)!) let duration:TimeInterval = (animated ? 0.5 : 0.0) tabBar?.isHidden = false if frame != nil { UIView.animate(withDuration: duration, animations: { tabBar!.frame = frame!.offsetBy(dx: 0, dy: offset) //tabBar?.isHidden = true //self.tableView.frame.size.height = self.tableView.frame.size.height + (tabBar?.frame.size.height)! }, completion: { if $0 {tabBar?.isHidden = hidden} }) } } //ScrollView Delegate extension reNewView : UIScrollViewDelegate { //Tab bar func scrollViewWillBeginDragging(_ scrollView: UIScrollView) { if scrollView.panGestureRecognizer.translation(in: scrollView).y < 0{ changeTabBar(hidden: true, animated: true) } else{ changeTabBar(hidden: false, animated: true) } } }

What to do ?

I checked this link also but still not getting proper answer.