在故事板本地化之间切换

Question

我有使用两种语言的故事板（Ar / En）的应用程序如何从阿拉伯语故事板切换到英语故事板，而无需更改语言iPhone设置（在运行时）。

当用户手动更改语言时，我使用：

+ (void)setDefaultLocalizationLanguage:(NSString *)language{
  [UserPreferences setDefaultLanguage:language];
  [[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:language, nil] forKey:@"AppleLanguages"];
  [[NSUserDefaults standardUserDefaults] synchronize];
}

在AppDelegate中，我添加了方法switchTolanguage：

-(void)switchTolanguage:(NSString *)lang{
   NSBundle *bnd = [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:lang ofType:@"lproj" ]];
   UIStoryboard *storyBoard = [UIStoryboard storyboardWithName:@"Main" bundle:bnd];
   UIViewController *initViewController = [storyBoard instantiateInitialViewController];
   self.window.rootViewController = initViewController;
} 

我在ViewController中执行最后一个方法：

AppDelegate *appdelagate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
[appdelagate switchTolanguage:[UserPreferences defaultLanguage]];

但是我在这个日志中有相同的故事板本地化：

Could not load the "4_icon_4.png" image referenced from a nib in the bundle with identifier "(null)"
Could not load the "1_logo.png" image referenced from a nib in the bundle with identifier "(null)"
Could not load the "1_bacground_img.png" image referenced from a nib in the bundle with identifier "(null)"

但是当我杀死应用程序并打开它时，我就有了很好的故事板。