Nikolilol/LXLocalizationLanguage

Use code to change iOS App Language.

LXLocalizationLanguage

Use code to change the application text language.

Integration step

1. Create your ‘Localizable.strings’ file and create your strings in different languages.
   
   
2. Define macro

#define Localized(key)  [[NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@",[[NSUserDefaults standardUserDefaults] objectForKey:@"appLanguage"]] ofType:@"lproj"]] localizedStringForKey:(key) value:nil table:@"Localizable"]
And use this macro to define your string.

3. Implement function
   

- (void)changeLanguage:(id)sender{
    // get current app language
    NSString *language = [[NSUserDefaults standardUserDefaults] objectForKey:@"appLanguage"];
    
    // switch language between 'en' and 'zh-Hans'
    if ([language isEqualToString: @"en"]) {
        [[NSUserDefaults standardUserDefaults] setObject:@"zh-Hans" forKey:@"appLanguage"];
    }else {
        [[NSUserDefaults standardUserDefaults] setObject:@"en" forKey:@"appLanguage"];
    }
    
    [[NSUserDefaults standardUserDefaults] synchronize];

    AppDelegate *delegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    
    // refreash windows.
    ViewController *vc = [[ViewController alloc] init];
    [delegate refresh:vc];
}

4. Implement function
   

- (void)refresh:(UIViewController *)viewController;

In AppDelegate to force refresh related ViewController.