Unburdened ViewControllers Triangle CocoaHeads - Aug 2012 Jay Thrash :: jay.thrash@mac.com :: @jaythrash

In the Beginning.. View Controller View Model Model View

Quickly becomes...

Quickly becomes... SOAP REST Core Data

Beginning of the End ViewController View Model Model View SOAP REST Core Data

No content

Open a Store

iOS Programming Big Nerd Ranch Guide

Store-Controllers CMMotionManager CLLocationManager

Model View Controller Store

MVC(S) Controller Model External Data Store View Controller Model View

Store Interface #import @class CHItem; @interface CHItemStore : NSObject { NSMutableArray *items; } // Access the singleton Store + (CHItemStore *)store; // Access Store contents - (NSArray *)allItems; - (void)addItem:(CHItem *)item; - (void)removeItem:(CHItem *)item; // Persist Store contents - (BOOL)save:(NSError *)err; @end

Store Responsibilities • Model Objects from Data Sources • Handles Loading & Saving of Model Objects • Encapsulates Caching and Lazy Fetching

Before & After Store Controller Fetches Models Controls Flow Persists Models Get, Update, Insert using Store Encapsulates Saving Requests Saving Caches Data Not concerned with data caching

Extra Credit • Asynchronous Data Requests • Memory Management • Caching • Lazy Loading

Change Your View

Third Wheel Controller View Model View External Data Store Model

Frictionless Controller View Model View External Data Store Model

Benefits • Reusable Views - Just add a Model • ViewController as Conductor • Interface with Store • Handle User’s Input

Name Author URL iOS Programming Joe Conway and Aaron Hillegass http://www.bignerdranch.com Ubuntu Font Family Canonical, Ltd. http://font.ubuntu.com/ Unburdened ViewControllers Jay Thrash :: jay.thrash@mac.com :: @jaythrash Resources & Attributions