Foundation-NSLocale

"name" = "酷走天涯";
"sex" = "25";
"city" = "上海";

   class func os_localizedStringForKey(_ key:String,defaultValue:String,bundleName:String)->String{
let bundlePath = Bundle.main.path(forResource: bundleName, ofType: "bundle")
var language = NSLocale.preferredLanguages.count > 0 ? NSLocale.preferredLanguages[0] : "en"
let bundle = Bundle(path: bundlePath!)!
if  !bundle.localizations.contains(language){
    language = language.components(separatedBy: "-")[0]
}
if let bundlePath = bundle.path(forResource: language, ofType: "lproj"){
    if let bundle = Bundle(path: bundlePath){
        return   bundle.localizedString(forKey: key, value: defaultValue, table: nil)
    }
}
return defaultValue
}

}