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iOS Dev Using Objective-C, Part 2: REST and JSON

with expert David Solberg


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Course at a glance

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Release date Release date 11/12/2012
Level Level Intermediate
Runtime Runtime 2h 8m
Platform Platform Major browsers on Windows Major browsers on Windows Major browsers on Mac OSX Major browsers on Mac OSX Mobile Devices Mobile Devices
Closed captioning Closed captioning N/A
Transcript Transcript N/A
eBooks / courseware eBooks / courseware N/A
Hands-on labs Hands-on labs N/A
Sample code Sample code Included
Exams Exams Included


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Course description

In this course we go over the basics of what it means to have a RESTful interface. We then review the Objective-C objects and methods we will use to interact with the remote service over http. Next we revise an application to use some basic http methods to download data from a Ruby server. Then we review the JSON information format. JSON objects map to Objective-C strings, numbers, dictionaries and arrays. We'll look at the format so we can predict from the raw data what types of objects we will get from the NSJSONSerialization class. Last but not least we create a custom NSObject subclass to hold JSON data.

Prerequisites

This course assumes that students have a general understanding of programming concepts in Xcode and Objective C.

Learning Paths

This course is part of the following LearnNowOnline SuccessPaths™:
iOS Mobile Development

Meet the expert

David Solberg David Solberg has been developing iOS applications for several years for both consumers and enterprises. He has multiple applications in the App Store in addition to numerous private applications for internal business use. He is co-organizer of the Twin Cities, Minnesota, Meetup group for iOS developers. In addition to his many years training people to use technology, David has architected online assessment systems.


Course outline



Rest and JSON

Introduction to Rest (23:50)
  • Introduction (00:36)
  • RESTful Interfaces (01:31)
  • SOAP (01:23)
  • Why REST (00:42)
  • When/Where to Use REST (00:55)
  • How to use REST (01:23)
  • HTTP Process in Objective-C (00:45)
  • NSURL Request (01:00)
  • NSURL Connection (02:18)
  • NSURL Response (01:28)
  • Accessing Public Resources (00:32)
  • Installing Ruby (01:16)
  • Demo: Starting Ruby (03:00)
  • Demo: App (06:30)
  • Summary (00:24)
Introduction to Rest Part 2 (23:19)
  • Introduction (00:45)
  • Demo: NSString (04:52)
  • Demo: NSURL and Error Checking (01:59)
  • Demo: NSURLRequest (01:31)
  • Demo: NSConnection (03:37)
  • Demo: NSResponse (02:42)
  • Demo: NSJSON Serialization (02:30)
  • Demo: JSON Error Checking (03:37)
  • Demo: Inspecting JSON (01:17)
  • Summary (00:24)
Understanding JSON (27:01)
  • Introduction (00:40)
  • Parsing the Data Received (01:39)
  • Understanding JSON (01:10)
  • Raw JSON (02:12)
  • JSON to Objective-C Objects (00:58)
  • Mapping JSON array to C (00:56)
  • Demo: Table View Cells (05:41)
  • Demo: Storyboard (00:59)
  • Demo: Subtitles (01:15)
  • Demo: NSNull (04:01)
  • Demo: Detail (01:47)
  • Demo: Segue (03:01)
  • Demo: Explaining Issues (02:09)
  • Summary (00:26)

JSON and RESTful Database

Representing JSON (35:37)
  • Introduction (00:40)
  • Custom Objective-C Objects (04:00)
  • Steps for Each Object (00:41)
  • Saving and Archiving (01:31)
  • Demo: Objective-C Objects (06:21)
  • Demo: Objective-C Methods (09:11)
  • Demo: Convert Member Objects (05:21)
  • Demo: Class Instances (05:22)
  • Demo: Booleans (02:05)
  • Summary (00:19)
Archiving JSON (18:40)
  • Introduction (00:37)
  • Demo: Saving with encoder (04:14)
  • Demo: Init with encoder (04:00)
  • Demo: Save Path (02:52)
  • Demo: Archiving (03:26)
  • Demo: Retrieving from Cache (03:03)
  • Summary (00:26)