給UINavigationController建立一個(gè)BaseNavigationController，然后在BaseNavigationController重寫一下以下這個(gè)方法，在你創(chuàng)建導(dǎo)航的那個(gè)地方將UINavigationController改成BaseNavigationController，只要用導(dǎo)航欄push的頁(yè)面，tabbacController都會(huì)自動(dòng)隱藏。

override func pushViewController(_ viewController:UIViewController, animated:Bool) {
        if childViewControllers.count>0{
            viewController.hidesBottomBarWhenPushed=true
        }
        super.pushViewController(viewController, animated: animated)
    }