iOS14 hidesBottomBarWhenPushed兼容问题

October 23, 2020

UITabController和UINavigation结构的项目，如果navgationController push出来的页面，每个都设置了hidesBottomBarWhenPushed=true,后续的第三层页面仍然会显示tab。

处理方法:

    override func pushViewController(_ viewController: UIViewController, animated: Bool) {                
        viewController.hidesBottomBarWhenPushed = viewControllers.count == 1
        super.pushViewController(viewController, animated: animated)
    }
    
    override func setViewControllers(_ viewControllers: [UIViewController], animated: Bool) {
        if viewControllers.count > 0 {
            viewControllers[1].hidesBottomBarWhenPushed = true
        }
        super.setViewControllers(viewControllers, animated: animated)
    }