Persistence with Core Data - Task

Objectives

Part 1

The Core Data framework provides generalized and automated solutions to common tasks associated with object life-cycle and object graph management, including persistence.

Part 2

Review the MVC and planning process to build a simple Task app. This planning will carry over to the accompanying project.

• You will be able to use basic best practices for proper database design
• You will be able to describe and implement the Core Data stack from scratch
• You will be able to describe, identify, and implement proper Model-View-Controller principles
• You will be able to systematically plan out each class needed for an MVP product

Required Preclass Resources

• Introduction to Database Design
• 11 Important Database Designing Rules
• Core Data Programming Guide

  Read 'Getting Started' and 'Integrating Core Data with iOS'

• Getting Started with Core Data Tutorial
• Stanford iOS Development MVC Description

  Watch from 13:30 - 29:55.

• Apple's MVC Documentation
• Understanding Model-View-Controller
• DevMountain App Canvas
• Core iOS Application Architectural Patterns

Lesson Video

Video Challenges

• Extremely Simple Core Data

  Redo the last part of the teacher demo independently.

  1. Create a new project
  2. Add a UITextField to the initial scene with an IBOutlet
  3. Add a 'Save' button to the scene with an IBAction saveButtonTapped()
  4. Create the Model
  5. Add a 'Person' model object with a 'name' attribute
  6. Import the Stack file
  7. On save, create a new Person object using NSEntitiyDescription
  8. On view did load, initialize and execute a fetch request and set the text field text
• Plan MVC Architecture for a Family Recipes App

  Draw the MVC triangle. Take 5 minutes to think through a simple Family Recipe App listing favorite family recipes. What type of model objects are there? What types of views are there? What View Controllers are there? What model controllers would be helpful? Add each of them to a list. Discuss with your neighbor.

Stretch Problem

Number Printer

Create a function that takes an Int as a parameter and prints it to the console the way an old-school alarm clock would look. You may create auxilary functions.

e.g. If you pass 257 the console might look something like this:

  ---   ---  ---
     | |        |
  ---   ---     |
 |         |    |
  ---   ---

♦ Black Diamond

Modify the function to take an Int array and print each number in the same fashion but on its own line.

Guided Project

Playlist Core Data

PlaylistCoreData is designed to help have students practice using Core Data and creating simple relationships between objects.

Project

• Task Part One

  Students will build a simple task tracking app to practice project planning, progress tracking, MVC separation, intermediate table view features, and Core Data.

  ReadMe

Mastery Review