Ios NSLocale到国家/地区名称

我在objective-C中看到了答案，但我不知道如何转换为swift

我的应用程序从Facebook接收用户的公共信息，我需要将区域设置转换为国家名称

FBRequestConnection.startForMeWithCompletionHandler({
            connection, result, error in    
            user["locale"] = result["locale"]
            user["email"] = result["email"]
            user.save()

            println(result.locale)


        })

例如，对于法国用户，代码将“可选（fr_fr）”发送到日志。但是我需要它只发送国家名称。根据localeplanet.com，“fr_fr”的显示名称是“French（France）”。所以在日志中我只想要“法国”

我利用了，迅速地翻译了一篇文章。试试这个：

let locale: NSLocale = NSLocale(localeIdentifier: result.locale!)
let countryCode = locale.objectForKey(NSLocaleCountryCode) as String
var country: String? = locale.displayNameForKey(NSLocaleCountryCode, value: countryCode)

// According to the docs, "Not all locale property keys
// have values with display name values" (thus why the 
// "country" variable's an optional). But if this one
// does have a display name value, you can print it like so.
if let foundCounty = country {
    print(foundCounty)
}

为Swift 4更新：

FBSDKGraphRequest(graphPath: "me", parameters: ["fields":"locale"]).start { (connection, result, error) in

    guard let resultDictionary = result as? [String:Any], 
          let localeIdentifier = resultDictionary["locale"] as? String else {
        return
    }

    let locale: NSLocale = NSLocale(localeIdentifier: localeIdentifier)

    if let countryCode = locale.object(forKey: NSLocale.Key.countryCode) as? String,
       let country = locale.displayName(forKey: NSLocale.Key.countryCode, value: countryCode) {
        print(country)
    }
}

通过对的研究，我迅速地翻译了一篇文章。试试这个：

let locale: NSLocale = NSLocale(localeIdentifier: result.locale!)
let countryCode = locale.objectForKey(NSLocaleCountryCode) as String
var country: String? = locale.displayNameForKey(NSLocaleCountryCode, value: countryCode)

// According to the docs, "Not all locale property keys
// have values with display name values" (thus why the 
// "country" variable's an optional). But if this one
// does have a display name value, you can print it like so.
if let foundCounty = country {
    print(foundCounty)
}

为Swift 4更新：

FBSDKGraphRequest(graphPath: "me", parameters: ["fields":"locale"]).start { (connection, result, error) in

    guard let resultDictionary = result as? [String:Any], 
          let localeIdentifier = resultDictionary["locale"] as? String else {
        return
    }

    let locale: NSLocale = NSLocale(localeIdentifier: localeIdentifier)

    if let countryCode = locale.object(forKey: NSLocale.Key.countryCode) as? String,
       let country = locale.displayName(forKey: NSLocale.Key.countryCode, value: countryCode) {
        print(country)
    }
}