///1. 获得当前窗口var JY_WINDOW: UIWindow? {    get{        if let app = UIApplication.shared.delegate as? AppDelegate {            return app.window        }        return nil    }}//2. iPhoneX系列var iphoneX_Series: Bool {    get {                if UIDevice.current.userInterfaceIdiom != UIUserInterfaceIdiom.phone{            debugPrint("不是iPhone， 是 \(UIDevice.current.userInterfaceIdiom.rawValue)")        }                if #available(iOS 11.0, *) {            if let bottom = JY_WINDOW?.safeAreaInsets.bottom , bottom > 0 {                return true            }        } else {            debugPrint("iOS11 之前的版本")        }        return false    }}

　　

安全区高度：        if #available(iOS 11.0, *) {             let  top = JY_WINDOW?.safeAreaInsets.top             let bottom = JY_WINDOW?.safeAreaInsets.bottom             let height = UIScreen.main.bounds.size.height - top - bottom        } else {            let height = UIScreen.main.bounds.size.height        }