根据文档定义[NSLocalepreferredLanguages]:Theuser'slanguagepreferenceorderasanarrayofNSStringobjects,eachofwhichisacanonicalizedIETFBCP47languageidentifier.[[NSBundlemainBundle]preferredLocalizations]的定义:AnarrayofNSStringobjects,eachofwhichidentifiesthealocalizationinthereceiver’sbundle.Thelanguagesare