Reload the app programmatically in swift

Question

I created localization for my storyboard (English, Arabic) and I did the function that changes (switch) the App. language (local) it's working perfect if I restart (relaunch) the app manually and my Views flip Right-Let if Arabic and Left-Right if English as well, but how can I change the storyboard local without restarting my app manually?.

I used this function to change the language

 func setLocale(langCode:String){

    NSUserDefaults.standardUserDefaults().setObject([langCode], forKey: "AppleLanguages")
    NSUserDefaults.standardUserDefaults().synchronize()

}

Thank in advance.

Answer 1

This is how you can do. However this code is in Obj-C.

Create a category class for NSBundle like this:

#import "NSBundle+ForceLocalization.h"
#import <objc/runtime.h>


static const char _bundle=0;
@interface BundleEx : NSBundle
@end

@implementation BundleEx

-(NSString*)localizedStringForKey:(NSString *)key value:(NSString *)value table:(NSString *)tableName
{
    NSBundle* bundle=objc_getAssociatedObject(self, &_bundle);
    return bundle ? [bundle localizedStringForKey:key value:value table:tableName] : [super localizedStringForKey:key value:value table:tableName];
}
@end

@implementation NSBundle (ForceLocalization)

+(void)setLanguage:(NSString*)language
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^
                  {
                      object_setClass([NSBundle mainBundle],[BundleEx class]);
                  });
    objc_setAssociatedObject([NSBundle mainBundle], &_bundle, language ? [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:language ofType:@"lproj"]] : nil, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
@end

After this, simply call:

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

You need to reload the UI for the current screen again. If you go on to another controller, you'll see the updated language.