How to get language/country code using NSLocale in Swift 3

        if let languageCode = (Locale.current as NSLocale).object(forKey: .languageCode) as? String {

            print(languageCode)

        }

        if let countryCode = (Locale.current as NSLocale).object(forKey: .countryCode) as? String {

            print(countryCode)

        }

執行結果是：

zh

TW