How to force “Respect Language Direction” from RTL to LTR and vice versa

Question

I have an application which uses Auto Layouts.

The app switches RTL and LTR languages perfectly when the user selects he\'s or her\'s device phone language. All text

Answer 1

Eventually, I have managed to solve this issue.

I couldn't find a way to force the change the RTL - LTR auto layout constraints, so i have decided to duplicate 2 additional storyboards for each language direction. So, actually my app now contains 3 storyboards - Main.storyboard, StoryboardRTL.storyboard and StoryboardLTR.storyboard.

Main handles changes in language direction when it is performed from the settings on the iDevice, and RTL / LTR is has it's own orientation, to support changing the app language from inside the app.

When the user selects to change to an RTL language, I set the selected language in the UserDefaults:

    [[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"he", nil] forKey:@"AppleLanguages"];
    [[NSUserDefaults standardUserDefaults] synchronize];

and right after i call a method i have written in the AppDelegate, which changes the storyboard according to the language layout.

- (void)reloadStoryboard
{
    UIStoryboard *storyboard;

    switch ([AALanguageManager getCurrentLanguage]) {

        case CurrentLanguageRTL:
            storyboard = [UIStoryboard storyboardWithName:@"StoryboardRTL" bundle:[NSBundle mainBundle]];
            break;
        default:
            storyboard = [UIStoryboard storyboardWithName:@"StoryboardLTR" bundle:[NSBundle mainBundle]];
            break;
    }

    self.window.rootViewController = [storyboard instantiateInitialViewController];
    [self.window makeKeyAndVisible];
}

This looks to the user as if the app restarted, and display the proper storyboard with the RTL / LTR layout. When the user restarts the app again, the selected language is already set, and the main storyboard is displayed, with all the correct layout according to selected language.