https://github.com/maximbilan/language-manager-ios

Language Manager iOS
https://github.com/maximbilan/language-manager-ios

apple ios language languages localization objective-c tutorial

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Language Manager iOS

• Host: GitHub
• URL: https://github.com/maximbilan/language-manager-ios
• Owner: maximbilan
• License: mit
• Created: 2014-12-23T11:59:24.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2018-09-22T07:23:27.000Z (over 6 years ago)
• Last Synced: 2024-12-10T02:21:10.270Z (16 days ago)
• Topics: apple, ios, language, languages, localization, objective-c, tutorial
• Language: Objective-C
• Homepage:
• Size: 163 KB
• Stars: 233
• Watchers: 12
• Forks: 34
• Open Issues: 10
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
How to change localization internally in your iOS application

============

Unfortunately, there’s no official way provided by Apple for this purpose. Let’s look at two methods for solving this problem.

## Method #1

Apple provides a way to specify an application-specific language, by updating the “AppleLanguages” key in NSUserDefaults. For example:


[[NSUserDefaults standardUserDefaults] setObject:@"fr" forKey:@"AppleLanguages"];

[[NSUserDefaults standardUserDefaults] synchronize];



For working this method, you’ll have to set it before UIKit initialized.


#import <UIKit/UIKit.h>

#import "AppDelegate.h"

#import "LanguageManager.h"


int main(int argc, char * argv[]) {

    @autoreleasepool {

        [[NSUserDefaults standardUserDefaults] setObject:@"fr" forKey:@"AppleLanguages"];

        [[NSUserDefaults standardUserDefaults] synchronize];

        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));

    }

}



The problem of this method is that the app has to be relaunched to take effect.

## Method #2

The solution is to swap the mainBundle of our application as soon as the user changes their language preferences inside the app.

See the category for NSBundle.

Header:


#import <Foundation/Foundation.h>


@interface NSBundle (Language)

+ (void)setLanguage:(NSString *)language;

@end



Implementation:


#import "NSBundle+Language.h"

#import <objc/runtime.h>


static const char kBundleKey = 0;

@interface BundleEx : NSBundle

@end

@implementation BundleEx

- (NSString *)localizedStringForKey:(NSString *)key value:(NSString *)value table:(NSString *)tableName

{

    NSBundle *bundle = objc_getAssociatedObject(self, &kBundleKey);

    if (bundle) {

        return [bundle localizedStringForKey:key value:value table:tableName];

    }

    else {

        return [super localizedStringForKey:key value:value table:tableName];

    }

}

@end

@implementation NSBundle (Language)

+ (void)setLanguage:(NSString *)language

{

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

        object_setClass([NSBundle mainBundle],[BundleEx class]);

    });

    id value = language ? [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:language ofType:@"lproj"]] : nil;

    objc_setAssociatedObject([NSBundle mainBundle], &kBundleKey, value, OBJC_ASSOCIATION_RETAIN_NONATOMIC);

}

@end



In this method, a problem that may arise is updating elements on active screens. You can reload your rootViewController from our application delegate, will always work reliably.


- (void)reloadRootViewController

{

    AppDelegate *delegate = [UIApplication sharedApplication].delegate;

    NSString *storyboardName = @"Main";

    UIStoryboard *storybaord = [UIStoryboard storyboardWithName:storyboardName bundle:nil];

    delegate.window.rootViewController = [storybaord instantiateInitialViewController];

}



All code you can see in this repository. With a simple example.

![alt tag](https://raw.github.com/maximbilan/ios_language_manager/master/img/1.png)

Please, use for free and like it ☺.

Note: In the example project by default the app uses method #2. You can disable this. Just comment define USE_ON_FLY_LOCALIZATION.

More details on the blog here.