iphone - Looking for tutorials on iPhoneCoreDataRecipes App -

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I find it difficult to find out how views are loaded and wired with TabBarController in the iPhoneCoreDataRecipes app.

How do anyone have to learn the concepts presented in this Apple sample app? I have read other items on the Apple developer site. 

  - (zero) applicationdeffincial launching: (UIApplication *) application {recipeListController.managedObjectContext = self.managedObjectContext; [Add windowSubviewview: Tabbar controller. picture]; [Window-making and knowledgeable]; }

my understanding of the above
Line 2: inventory controller public relations?
Line 3: Adding a Sub View to the Tab Controller View?

If the understanding of my line 3 is correct, then where are the other ideas, unit conversion, tab controller added?

A tab bar controller needs a list of view controllers I have not seen this specific spec, so It can be taken care of from the first line, however, normally you will do the following:

  1. Instant all view controllers: 

      UIViewcontroller * viewControllerTab1 = ... UIViewcontroller * viewControllerTab2 = .. Add to tab bar controller:  
      tabBarController.viewControllers = [Object with NSArray array: View no Yntrktab 1, Scene Niyntrktab 2, Drishykantrolrtab 3, zero];  
  2.  
     You will then add the view of the Tab Bark Controller in the window as a subview, followed by Window Mkake and Visual (Line 2 and 3). These tabs are not specific to the bar, they just add tab bar views to the main app view, like you see another controller. You can either specify the UITabBarItem description here, or view controllers, you should do it here so that you do not go into any issues that do not display tab bar items. . To wit. 
       viewControllerTab1.tabBarItem = [UITabBarItem init ...]  
    3.

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