Screenshoot

Features

• No additional bundle resources
• Full language supported
• Runtime language switch
• No relaunch application
• Much like system ViewController in Settings > General > Language & Region > iPhone Langage.

Usage

Present GSLanguagePickerController:

- (IBAction)selectLanguageAction:(UIButton *)button {
    GSLanguagePickerController *vc = [GSLanguagePickerController new];
    UINavigationController *navi = [[UINavigationController alloc] initWithRootViewController:vc];
    [self presentViewController:navi animated:YES completion:nil];
}

Or push GSLanguagePickerController:

- (IBAction)selectLanguageAction:(UIButton *)button {
    GSLanguagePickerController *vc = [GSLanguagePickerController new];
    [self.navigationController pushViewController:vc animated:YES];
}

And you can also observing language changed notification NSCurrentLocaleDidChangeNotification:

- (void)viewDidLoad {
    [super viewDidLoad];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(languageChanged:) name:NSCurrentLocaleDidChangeNotification object:nil];
}

- (void)languageChanged:(NSNotification *)notification {
    NSString *languageId = notification.object;
    NSLog(@"Language has changed: %@", languageId);

    NSLocale *locale = [NSLocale localeWithLocaleIdentifier:[NSBundle defaultLanguage]];
    NSString *languageName = [locale displayNameForKey:NSLocaleIdentifier value:languageId];
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Language has changed" message:[NSString stringWithFormat:@"%@: %@", languageId, languageName] preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction *action = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil];
    [alertController addAction:action];
    [self presentViewController:alertController animated:YES completion:nil];

    // TODO: reload viewcontroller or other works
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

Reference

Language and Locale IDs - Apple Developer

Requirements

GSLanguagePickerController require iOS 8.0+.

Installation

GSLanguagePickerController is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "GSLanguagePickerController"

Known issue

The legacy localization bundle name in UIKit.framework has various types.

1. [English Name].lproj

   Examples: English.lproj, French.lproj, German.lproj, Spanish.lproj

2. [Language Id]_[Region Id].lproj

   Examples: zh_CN.lproj, zh_HK.lproj, zh_TW.lproj, en_GB.lproj

3. [Language Id]-[Script Id].lproj

   Examples: zh-Hans.lproj, zh-Hant.lproj, es-ES.lproj

At present, type 2 can't be supported well, so UIBarButtonSystemItem and other components who uses UIKit bundle resource, may be affected until application relaunch.

Author

gaosen, [email protected]

License

GSLanguagePickerController is available under the MIT license. See the LICENSE file for more info.