获取当前系统语言

OC语言：

+ (NSString*)getPreferredLanguage{        NSUserDefaults* defs = [NSUserDefaults standardUserDefaults];        NSArray* languages = [defs objectForKey:@"AppleLanguages"];        NSString* preferredLang = [languages objectAtIndex:0];        return preferredLang;}

swift 语言：

func getCurrentLanguage() -> String{       let defs = NSserDefaults.standardUserDefaults()       let languages = defs.objectForKey("AppleLanguages")//获取系统支持的所有语言集合       let preferredLanguage = languages!.objectAtIndex(0)//集合第一个元素为当前语言       return String(prefrredLanguage)//若当前系统为英文，则返回en_US}

swift升级版：

   static func getCurrentLanguage() -> String {//        let defs = UserDefaults.standard//        let languages = defs.object(forKey: "AppleLanguages")//        let preferredLang = (languages! as AnyObject).object(0)        let preferredLang = Bundle.main.preferredLocalizations.first! as NSString//        let preferredLang = (languages! as AnyObject).object(0)        Log.debug("当前系统语言:\(preferredLang)")        switch String(describing: preferredLang) {        case "en-US", "en-CN":            return "en"//英文        case "zh-Hans-US","zh-Hans-CN","zh-Hant-CN","zh-TW","zh-HK","zh-Hans":            return "cn"//中文        default:            return "en"        }    }