Resizable-Views

This sample Project make A View Being Dragged in View and Change its And other used views Height According to the Requirement and changes made

Project Hierarchy

 --> Main View
   --> 2 ContainerViews
      --> Subviews in ContainerView
   --> Container View At Bottom Draggable (Pan Gesture)

Pan Gesture

func addPanGesture()
{
    let gesture : UIPanGestureRecognizer = UIPanGestureRecognizer(target: self, action:#selector(ViewController.handlePanGesture(panGesture:)))
    self.bottomContainerView.addGestureRecognizer(gesture)
}

View Translation

///Move view to required Position
panGesture.view?.frame = CGRect(x: 0, y: currentPoint.y, width: self.view.frame.size.width, height: self.view.frame.size.height-currentPoint.y)
self.upContainerView.frame = CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: self.view.frame.size.height-(panGesture.view?.frame.height)!)
panGesture.setTranslation(CGPoint.zero, in: self.view)

Output