title: How to update the whole UI according to the configuration the user selects
body: <p>I have a <code>configfile1.plist</code> file in my app bundle that includes all the required settings for the UI of the app, i.e. the background images, the animations, the sounds, database, and anything else. I have used a ConfigFileManager class in which there's this method as follows:</p>
  
  <pre><code>-(void) loadConfigFile
  {
      configFile = [[NSBundle  mainBundle] pathForResource:@"ConfigFile1"
                                                ofType:@"plist"];
  rootDictionary = [[NSDictionary alloc]initWithContentsOfFile:configFile];
  
  //__ settings
  settings = [rootDictionary objectForKey:@"settings"];
  timerMode = [settings objectForKey:@"timerMode"];
  timePerQuestion = [settings objectForKey:@"timePerQuestion"];
  if (timerMode.intValue == 1) {
      //__time is fixed.
  }
  else
  {
      //time is not fixed, there's an initialTime to begin with, and it increases if the answer is correct (timePerQuestion), and doesn't change if it's wrong.
      initialTime = [settings objectForKey:@"initialTime"];
  }
  
  //__ Textures
  textures = [rootDictionary objectForKey:@"textures"];
  
  //__ buttons
  buttons = [textures objectForKey:@"buttons"];
  buttonBackground = [buttons objectForKey:@"buttonBG"];
  buttonBackgroundSelected = [buttons objectForKey:@"buttonBGSelected"];
  mainMenuPlayButton = [buttons objectForKey:@"mainMenu.playButton"];
  .
  .
  .
  }
  </code></pre>
  
  <p>This is the default configuration for the app for which the method is called in the app delegate while the app is being opened. Now let's say I have <code>configfile2.plist</code>, <code>configfile3.plist</code>, and so on. I have a <code>UIViewController</code> for this, too, that must display the available config files in a table view. What should I do this, so that the user can select one of the config files, and that gets applied to the whole app?</p>
  
  <p>Any detailed response will be appreciated.
  Thanks in advance! </p>