COMP 446 / ELEC 446
Mobile Device Applications
Scott Cutler
Professor in the Practice of Computer Technology
Department of Computer Science
Department of Electrical and Computer Engineering
cutler@rice.edu
10/3/12
Wednesday 2-3:30, DH 1046
Agenda
 Events of the Week
 Next week’s assignment and class
 Multi-thread, MapKit and Persistence Preview
 Questions on Assignment #4
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Events of the Week
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Samsung Asks for New Trial in Apple Case
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iOS 6 users continue to grapple with Wi-Fi problems
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Apple rolls out fix for iPhone 5 Wi-Fi network data bug
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Apple CEO: We are 'extremely sorry' for Maps flap
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Intel Disputes Reported Otellini Comments About Windows 8
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HP CEO Meg Whitman Shares Turnaround Plan
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Judge puts Galaxy Tab back on market; Samsung sues over iPhone
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AT&T nabs One X+, One VX, Windows Phone 8X from HTC
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SSDs: mind-blowing Moore's law case studies
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Data Is Data Right? The Truth About LTE vs. 3G
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Samsung retains U.S. smartphone crown, Apple rapidly catching up
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The smartphone battle has now moved from hardware to services
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Nest 2.0: Slimmer, sleeker thermostat smarter than ever
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Current Roster
 Victor Acuna
 Ryan Artecona
 Gbenga Badipe
 Peter Chang
 Joan Chao
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Current Roster (2)
 Alex Chiu
 Heaven Chen
 Lingo Dai
 Weibo He
 Sahil Hingorani
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Current Roster (3)
 Abdul Nimeri
 Bill Robertson
 Frank Salinas
 Tyler Siegert
 Austin Witt
 Matthew Zhao
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COMP 446 Syllabus (updated)
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Lecture 1 - 8/22/12 - Introduction
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Lecture 2 - 8/29/12 - Assignment 1 issues and questions from videos
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Watch before:
3, 4 (demo part)
Assignment:
#3 – Graphing Universal Calculator
Assignment due: Tuesday, 9/18 6:00 am (Monday 30:00)
Lecture 4 - 9/12/12 - Assignment 3 issues and questions from videos
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Watch before:
1, 2
Assignment:
#2 – Function Calculator
Assignment due: Friday, 9/7 6:00 am (Thursday 30:00)
Lecture 3 - 9/05/12 - Assignment 2 issues and questions from videos
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Watch before:
None
Assignment:
#1 - Calculator
Assignment due: Friday, 8/31 6:00 am (Thursday 30:00)
Watch before:
4 (post demo), 5, 6
Assignment:
Continue with #3 – Graphing Universal Calculator
Assignment due: Tuesday, 9/18 6:00 am (Monday 30:00)
Lecture 5 - 9/19/12 - Assignment 3 issues and questions from videos
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Watch before:
Watch 7 before class, 8 after class
Assignment:
#4 – Flickr Top Places
Assignment due: Friday, 10/05 6:00 am (Thursday 30:00)
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COMP 446 Syllabus (updated)
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Lecture 6 - 9/26/12 - Assignment 4 technology preview
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Watch before:
Assignment:
8, 9 very beginning of 10
1: #6 – Flickr Core Data
- To be broken into required and optional parts
- Optional part required for A+
2: Final Project Topic (due before next class)
Assignment due: Friday, 10/19 6:00 am (Thursday 30:00)
Lecture 8 - 10/10/12 - Assignment 6 technology preview and SQL
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8, 9 very beginning of 10 (for Assignment 4)
#5 – Flickr Map Places
Tasks 3, 4 and 8 are optional for extra credit (required for A+)
Assignment due: Thursday, 10/11 6:00 am (Wednesday 30:00) (10/12 OK)
Lecture 7 - 10/03/12 - Assignment 5 technology preview
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Watch by 10/3:
Assignment:
Watch for #5:
10 (after Tab Bar), 11, 12
Assignment:
Final Project Proposal
Assignment due: Tuesday, 10/16 6:00 am (Monday 30:00)
Lecture 9 - 10/17/12 - iOS 6, Server technology
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Watch for #6:
13, 14
Assignment:
iOS 6 app
Assignment due: Friday, 10/26 6:00 am (Thursday 30:00)
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COMP 446 Syllabus (updated)
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Lecture 10 - 10/24/12 - HTML 5, Windows Phone
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Lecture 11 - 10/31/12 – Android
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Assignment:
Continue working on Final Project
Assignment due: Wednesday, 11/28 2:00pm
Lecture 14 - 11/21/12 – No class, but continue on final project
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Assignment:
Continue working on Final Project
Assignment due: Wednesday, 11/28 2:00pm
Lecture 13 - 11/14/12 - Individual meetings on Final Project
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Watch before:
Optional 17, 18
Assignment:
Continue working on Final Project
Assignment due: Wednesday, 11/28 2:00pm
Lecture 12 - 11/7/12- Android vs. iOS vs. Windows Phone group debate
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Watch before:
Optional 15, 16
Assignment:
Major Final Project Feature
Assignment due: Friday, 11/2 6:00 am (Thursday 30:00)
Assignment:
Continue working on Final Project
Assignment due: Wednesday, 11/28 2:00pm
Lecture 15 - 11/28/12 - Final Presentations
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Assignment:
Document Final Project
Assignment due: By time assigned for COMP 446 final (there is NO final exam)
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Final Project Timeline New
9/19
9/26
10/03 10/10 10/17 10/24 10/31 11/7
11/14 11/21 11/28 12/5
- #4 10/05
- #5 10/12
- FP Topic 10/10
- #6 10/17
- FP Proposal 10/16
- Major Feature 11/2
- Individual Meetings 11/14
- Final Presentation 11/28
- Documentation due Finals Day
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Deploying to Device
 Read deployment information at developer.apple.com
 4 Steps
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Load intermediate certificate
Request development certificate
Send me device id to register
Use Xcode to deploy. It will use team provisioning
profile
 If you have problems, we will have a deployment session
after class.
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Week 8
 Watch CS193p lectures #10 (after Tab Bar), #11 and #12
 Email dialog to determine final project before next class
 Make progress on CS193p Assignment #5
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Try and complete before 10/10 class. Due Thursday, 10/11 6:00
am due to centennial, but Friday submission OK.
 Next week’s lecture – Core Data Preview
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What is coming up in the assignments?
 Assignment #4 – Flickr Top Places
Tab bar controllers
 TableView controllers
 ScrollViews
 Data from the internet
 Assignment #5 – Fast Flickr Map
 Multi Threading / Grand Central Dispatch
 MapKit
 Deployment and cache aspects optional (Tasks 3, 4 and 8)
 Assignment #6 – Core Data Flickr
 UIDocument
 Core Data
 Aspects outside of core data version of #5 optional
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Review of Vides 10-12
 Many of the slides to follow come directly
from the Fall 2011 Stanford CS193p slide
deck.
 Some come from earlier versions of CS193p
which I think were a bit clearer than the
current deck
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Video 10 – Grand Central Dispatch
 UI should always be responsive
 Put time consuming tasks in a separate queue
 UI must run in main queue
 GCD – another example of Apple making a difficult task
quite easy
 Linear programming of multiple queues
 Rich interface with many complexities
 Most common scenario is quite simple
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Blocks Simplified
 A set of statements bracketed by { and } similar to a
method or if statement, Preceded by carat ^
^{
UIImage *image = [UIImage imageWithData:imageData];
self.imageView.image = image;
self.imageView.frame = CGRectMake(0, 0, image.size.width, image.size.height);
self.scrollView.contentSize = image.size;
}
 Method’s local variables stay in scope
 For the most part, can be treated like an object (typedef)
 NSArray methods for enumerating with blocks
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Grand Central Dispatch
 C API, more ()
 Runs different queues in separate threads
 Easy process
Create queue
 Dispatch queue with block
 Release queue
 Must keep UI in main threat
 Inside above queue, dispatch UI block within
separate block.
 This is all you will need for Assignment #5
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GCD Memory Management Issues
 Avoid circular references to self as it will leak memory
 _ _ weak MyClass *weakSelf = self;
 Local variables declared in method before blocks still in
scope
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Read only unless tagged with _ _ block
_ _ block BOOL stoppedEarly = NO;
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Video 11 – Core Location / MapKit
 Two major frameworks that often go together
 Core Location and MapKit
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MapKit is the heart of assignment #5
 Not part of default linking, but very easy to add
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Core Location
 Basic object is CLLocation
 @property
 coordinate
 altitude
 horizontalAccuracy / verticalAccuracy
 timestamp
 speed
 course
 Highly abstracted from backend processing
 Many automatic callbacks
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MapKit
 Base Element is MKMapView
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Complete map in Class
Abstracts underlying technologies
Can be layered with other information
 Rich set of annotations
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MKAnnotation
 Drop Pins and configurable callouts
 Similar in many ways to UITableViewCell
 Can use standard MKAnnotationViews or
embellish with custom views
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Video 12 – Persistence
 Multiple forms of persistence
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Property Lists (such as NSUserDefaults)
Archiving Objects
Storing things in the file system
SQLite
Core Data
 Core Data is at the heart of Assignment #6 and very
important
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Conceptually difficult, but way simplified from previous years.
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iOS File System
 Each application has its own sandbox for protection
 Actual binary along with shipped resources in
application bundle directory - which is read only
 Copy prototype documents to documents directory
for modification
 Cache directory for recreatable objects
 Directory choice important for backup
 Watch lecture (short) even if not doing extra credit
 Core Data will use small part of this technology
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Assignment #4 Questions
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