// 屏幕旋转通知
NotificationCenter.default.addObserver(self, selector: #selector(transitionMethod), name: UIDevice.orientationDidChangeNotification, object: nil)

// 屏幕旋转将要旋转时会调用这个方法可以做视图适配
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
        let orient = UIDevice.current.orientation
        if orient == .portrait {
            print("竖屏")
            ceshiView.frame = CGRect(x: 0, y: 0, width: size.width, height: 500)
        } else {
            print("横屏")
            ceshiView.frame = CGRect(x: 0, y: 0, width: size.width, height: size.height)
        }
    }