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Intro iOS App Dev - Coggle Diagram

- - - - UIApplication
        
        Central point of control & coordination
        
        Initialize and display applications window
        
        Load app first view into the window
      - UIApplicationDelegate
        
        Maintain the shared behavior
        
        Work with UIApplication to manage every communication with the OS
      - UserDefaults
      - ViewController
        
        UIViewController - Define shared behavior and properties
        
        Oversees the activities that happens on screen (UI, animation, Interaction, Navigation, etc)
      - UIDocument
        
        Create and mange documents and content
        
        Used for handling local file systems
        
        Its purpose is to ease the process of storing files using iCloud