How to set the default language in iOS

In iOS development, we need to perform localization to display the content of some resources (mainly strings) in different languages. For example, "edit" is displayed in English, and "Edit" is displayed in Chinese ". The customer of a recent project requested to support two languages: English and Italian, with emphasis on the default Italian language. The current language is not English and Italian is required to display Italian. The Localization native development region option in xcode is used to set the default region. In this way, the localized resources are displayed in the localized region, and the default resources are displayed in the non-localized region. However, this setting does not mean this. The default string uses English. No matter what the development region is set, the non-localized area displays English. In order to implement the function of this default language, I can only try other ways. Finally, I implemented it using code. The basic idea is to find that the current language is not supported by the system in English and Italian, unified Access to the specified resource file and the default resource is returned. The Code is as follows: # define CURR_LANG ([NSLocale preferredLanguages] objectAtIndex: 0]) + (NSString *) DPLocalizedString :( NSString *) translation_key {NSString * s = NSLocalizedString (translation_key, nil); if (! [CURR_LANG isEqual: @ "en"] &! [CURR_LANG isEqual: @ "it"]) {NSString * path = [[NSBundle mainBundle] pathForResource: @ "it" ofType: @ "lproj"]; NSBundle * export agebundle = [NSBundle bundleWithPath: path]; s = [Export agebundle localizedStringForKey: translation_key value: @ "" table: nil];} return s, in the code, you can change the NSLocalizedString macro to DPLocalizdString to change the default language.