typealias LanguageLocaleType = (language: String?,locale: String?,title: String)

    let elements: [LanguageLocaleType] = [
        (nil,nil,"System Default"),("en","en_US","English"),("ar","ar_SA","Arabic"),]

    //...func tableView(_ tableView: UITableView,didSelectRowAt indexPath: IndexPath)...

    let element = elements[indexPath.row]

    guard let language = element.language else {
        // How to really reset app back to OS language/locale???
        UserDefaults.standard.removeObject(forKey: "AppleLanguages")
        UserDefaults.standard.removeObject(forKey: "AppleLocale")
        return
    }

    UserDefaults.standard.set([language],forKey: "AppleLanguages")

    if let locale = element.locale,!locale.isEmpty,Locale.current.identifier != locale,!Locale.current.identifier.hasPrefix("\(language)_") {
            UserDefaults.standard.set(locale,forKey: "AppleLocale")
    }

我想提供在列表中设置选择正确的语言的语言,其中一个用于将语言设置回系统默认值.但是,没有办法找到我能找到的操作系统级语言和语言环境.因为在我设置UserDefaults后,Bundle.main.preferredLocalizations不可靠并且与系统默认值不匹配(当我从User Default中删除密钥时的事件).

有没有办法获得操作系统级别的语言和区域设置而不是应用程序级别？