Refresh the page view lead controller

Instructions

PageVC

// viewControllers: a sub-controller 
// headerView: first view 
// pageTitleView: menu bar 
// viewHeight: pageVC height, when other space at the bottom, through which is controlled 
pageVC = LXPageViewController.init (viewControllers: controllers, headerView: headView !, pageTitleView: the titleView !, a viewHeight that is: view.frame.height) 
!! = Self pageVC .delegate the addChild (pageVC) view.addSubview (pageVC .view)! '' '

Sub-controller:

1. inherited LXChildViewController
2. override the parent class property

override var offsetY: CGFloat { 
　　set { 
　　　　tableView!.contentOffset = CGPoint(x: 0, y: newValue) 
　　} 
　　
　　get { 
　　　　return tableView!.contentOffset.y } 
　　} 

override var isCanScroll: Bool { 
　　didSet { 
　　　　if isCanScroll { 
　　　　　　tableView!.setContentOffset(CGPoint(x: 0, y: offsetY), animated: false) 
　　　　} 
　　} 
}

3. Implementing a proxy method

 func scrollViewDidScroll(_ scrollView: UIScrollView) { 
　　scrollDelegate?.lxChildViewController(self, scrollViewDidScroll: scrollView) 
}