4. Building an Application; Model, View, Controller; Nib Files; Controls and Target-Action (January 14, 2010)

UIApplicationDelegate

• Xcode project templates have one set up by default 

• Object you provide that participates in application lifecycle 

• Can implement various methods which UIApplication will call 

• Examples:

   - (void)applicationDidFinishLaunching:(UIApplication *)application; 

   - (void)applicationWillTerminate:(UIApplication *)application;

      홈 버튼 눌렀을때(어플 종료전에 후다닥 처리해야 될 사항들)

   - (void)applicationWillResignActive:(UIApplication *)application; 

      전화 같은게 와서 어플이 백그라운드로 들어갈때 (멀티 태스킹 되구만..)

   - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url;

      커스텀 스키마 등록, 예를들어 http://... 은 웹페이지 열기.

      커스텀 스키마를 통해 다른 어플에서 해당 어플을 시작시키기 가능(구글맵이 이렇게 되던데..)

   - (void)applicationDidReceiveMemoryWarning:(UIApplication *)application;

Model

• Manages the app data and state 

• Not concerned with UI or presentation 

• Often persists somewhere

• Same model should be reusable, unchanged in different interfaces

     어떻게 표현될지를 고려하지 않은 그냥 순수 데이터(파일, DB) 이라고 이해..

View

• Present the Model to the user in an appropriate interface

• Allows user to manipulate data

• Does not store any data 

   ■ (except to cache state)

• Easily reusable & configurable to display different data

     사용자에게 보여지는 화면(테이블 뷰는 단지 보여지기만 할뿐 데이터를 가지진 않음, 컨트롤러가 가져오지..)

Controller

• Intermediary between Model & View 

• Updates the view when the model changes 

• Updates the model when the user manipulates the view 

• Typically where the app logic lives.

     뷰에 꾸며지기 위해 데이터를 가공해주는 역할

  잘 설명해주는 듯 ㅋ

Manual Target-Action

• Same information IB would use 

• API and UIControlEvents found in UIControl.h 

• UIControlEvents is a bitmask

@interface UIControl 

   - (void)addTarget:(id)target action:(SEL)action

              forControlEvents:(UIControlEvents)controlEvents;

   - (void)removeTarget:(id)target action:(SEL)action 

              forControlEvents:(UIControlEvents)controlEvents;

@end

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