swift4.0 iPhone刘海屏判断

 func isiPhoneXScreen() -> Bool {
        guard #available(iOS 11.0, *) else {
            return false
        }
        
        let isX = UIApplication.shared.windows[0].safeAreaInsets.bottom > 0
        print("是不是刘海屏呢--->\(isX)")
        return isX
    }