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Wednesday 2-3:30, DH 1046

Wednesday 2-3:30, DH 1046. 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 9/12/12. Agenda. Events of the Week

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Wednesday 2-3:30, DH 1046

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  1. Wednesday 2-3:30, DH 1046

    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 9/12/12
  2. Agenda Events of the Week Next week’s assignment and class Review of Assignment 2 Some more on Views, Gestures, Protocols Questions on Assignment #3 COMP 446 / ELEC 446 - Week 4
  3. Events of the Week Amazon Debuts Three New Kindle Tablets Amazon's gadget as a service theme: Hardware becomes irrelevant soon 'Bing It On': Microsoft Challenge Targets Google Search T-Mobile: Bring your unlocked iPhone over to us Nokia culpa: Phony Lumia 920 video prompts ethics probe HP Ups Layoff, Buyout Head Count to 29,000 by 2014 Some stores report zero BlackBerry sales in last month – analyst Best Buy Takes on RadioShack in Mobile Strip-Mall Push Samsung Galaxy S III Sells 20 Million Units in 100 Days U.S. judge: HTC patents likely valid in Apple suit Samsung may sue Apple over iPhone 5; Apple fights tablet ruling COMP 446 / ELEC 446 - Week 4
  4. Event of the Week COMP 446 / ELEC 446 - Week 4
  5. Current Roster Victor Acuna Ryan Artecona Gbenga Badipe Peter Chang Joan Chao COMP 446 / ELEC 446 - Week 4
  6. Current Roster (2) Alex Chiu Heaven Chen Lingo Dai Weibo He SahilHingorani COMP 446 / ELEC 446 - Week 4
  7. Current Roster (3) Abdul Nimeri Bill Robertson Frank Salinas Tyler Siegert Austin Witt Matthew Zhao COMP 446 / ELEC 446 - Week 4
  8. Optional Sessions and Support Monday office hours with TA Richard Latimer. 4:00pm Mudd STOPPED DUE TO LACK OF ATTENDANCE Ability to email questions to me at any time. Can email Richard Latimer as well. Level of support will vary over semester High level of support at the beginning. Support decreasing each project as over time as knowing where to look or how to debug is a very important skill for you to learn. Richard instructed to respond conceptually – not just provide solutions. COMP 446 / ELEC 446 - Week 4
  9. COMP 446 Syllabus Lecture 1 - 8/22/12 - Introduction Watch before: None Assignment: #1 - Calculator Assignment due: Friday, 8/31 6:00 am (Thursday 30:00) Lecture 2 - 8/29/12- Assignment 1 issues and questions from videos 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 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 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 Watch before: Watch 7 before class, 8 after class Assignment: #4 – Fiickr Top Places Assignment due: Friday, 9/28 6:00 am (Thursday 30:00) COMP 446 / ELEC 446 - Week 4
  10. COMP 446 Syllabus Lecture 6 - 9/26/12 - Assignment 4 issues and questions from videos Watch before: 8, 9 very beginning of 10 Assignment: #5 – Fiickr Map Places Assignment due: Friday, 10/5 6:00 am (Thursday 30:00) Lecture 7 - 10/03/12 - Assignment 5 issues and questions from videos Watch before: 10 (after Tab Bar), 11, 12 Assignment: 1: #6 – Fiickr Core Data - Likely to be broken into required and optional parts - Optional part required for A+2: Final Project Topic (due before next class) Assignment due: Friday, 10/12 6:00 am (Thursday 30:00) Lecture 8 - 10/10/12 - Assignment 6 issues and SQL Watch before: 13, 14 Assignment: Final Project Proposal Assignment due: Tuesday, 10/16 6:00 am (Monday 30:00) Lecture 9 - 10/17/12 - iOS6 Watch before: Optional 15, 16 Assignment: iOS 6 app Assignment due: Friday, 10/26 6:00 am (Thursday 30:00) COMP 446 / ELEC 446 - Week 4
  11. COMP 446 Syllabus Lecture 10 - 10/24/12 – HTML 5 Watch before: Optional 17, 18 Assignment: Major Final Project Feature Assignment due: Friday, 11/2 6:00 am (Thursday 30:00) Lecture 11 - 10/31/12 - TBD 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 Assignment: Continue working on Final Project Assignment due: Wednesday, 11/28 2:00pm Lecture 13 - 11/14/12 - Individual meetings on Final Project 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 Assignment: Continue working on Final Project Assignment due: Wednesday, 11/28 2:00pm Lecture 15 - 11/28/12 - Final Presentations Assignment: Document Final Project Assignment due: By time assigned for COMP 446 final (there is NO final exam) COMP 446 / ELEC 446 - Week 4
  12. Final Projects Projects will be individual An acceptable iPad project can couple to an iPhone project Projects can be in iOS, Windows 8 or Android You are responsible for Win 8 or Android technology I have a small number of iOS devices that can be used by students without one. May have to share Likely have to deploy from a non-community Mac Must utilize at least one major and one minor iOS framework and feature not covered in first 6 assignments; preferably >1 major. Project must be pre-approved Often because proposed project too difficult to complete Sometimes need to be modified for content COMP 446 / ELEC 446 - Week 4
  13. Final Project Ideas Augmented Reality is always a winner There are some interesting robots utilizing the iPhone. One could make a board game with iPhone players and iPad game board. OpenGL is a good feature. External universal frameworks are NOT allowed. Utilizing a backend is good, but not much credit given for backend logic COMP 446 / ELEC 446 - Week 4
  14. Week 5 Watch CS193p lectures #7 and first part of #8 Make progress on CS193p Assignment #3 Videos #7 and #8 content required for assignment Try and complete before 9/19 class. Due Friday, 9/21 6:00 am . Submit assignments, review lectures at www.comp446.com Start thinking about big project Next week’s lecture – iPad and Life Cycle COMP 446 / ELEC 446 - Week 4
  15. Assignment #2 Comments Sloppiness @synthesize foo=_foo; _foo should only be used in setter and getter [[calculatorBrain class] runProgram…] instead of [CalculatorBrainrunProgram] Sometimes you do use [self class] to properly refer to subclasses. Group methods commonly run together into group method that is called in place of calling the individual methods. Improper use of first letter capitalization Class names start UpperCase. Method names in lowerCase. Think through the data structures before writing too much code. The proper data structure makes many things easier. If you find a task too difficult, it may be because of the way your organized COMP 446 / ELEC 446 - Week 4
  16. What is coming up in the assignments? Assignment #3 – Graphing Calculator Core Graphics, views, frames, bounds, etc. Navigation Controllers Storyboards and Segues Gesture recognizers Protocols and Delegates iPad apps, Universal Apps, SplitView controllers Assignment #1 was easy. #2 was more difficult. #3 incorporates many new paradigms Will need to watch through video 7 for iPad information COMP 446 / ELEC 446 - Week 4
  17. 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 Builds on Assignment #4 Multi Threading / Grand Central Dispatch MapKit Assignment #6 – Core Data Flickr UIDocument Core Data COMP 446 / ELEC 446 - Week 4
  18. Video Sequence Evidence that people are starting the assignments prior to watching the videos – DON’T I have worked to pace my lectures and COMP 446 assignment deadlines with listed videos roughly paralleling Stanford progression. Most sets tell theory in one lecture and give a related demo in the next. Sometimes reversed. Video demos VERY useful for your homework COMP 446 / ELEC 446 - Week 4
  19. Review of Video 3 Items 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 COMP 446 / ELEC 446 - Week 4
  20. UIView Top level drawing class with many defined subclasses Top level rectangular area for drawing. Often contains multiple subviews and possibly one superview. Views are ordered with definable transparency. Memory Management: A superview maintains a strong pointer to its subviews. COMP 446 / ELEC 446 - Week 4
  21. Drawing Coordinates C based floats and structs CGFloat data type Two CGFloats make up a CGPoint or CGSize. A CGPoint and a CGSize make a CGRect CGRectaRect = CGRectMake (5.1, 7, 20, 30); aRect.size.height =75; COMP 446 / ELEC 446 - Week 4
  22. Drawing Coordinates Origin (0, 0) in upper left. Units in points and not Pixels @property CGFloatcontentScaleFactor; //pixel Three important @properties: @property CGRect bounds; Your view’s “bounding” rectangle @property CGPoint center; Your view’s center in superview’s coordinates @property CGRect frame; A rectangular area in superview’s coordinates that encompasses your view. COMP 446 / ELEC 446 - Week 4
  23. Custom Views Views often created in .storyboard file Can be created in code with custom class UIView subclass Override drawRect: method You NEVER call drawRect Call UIView’s –(void)setNeedsDisplay; method The drawing API is C, not object-oriented. More (), less * COMP 446 / ELEC 446 - Week 4
  24. Drawing Process First get a drawing context Context is fancy word that collects the various drawing parameters. CGContextRef context = UIGraphicsGetCurrentContext(); No memory management (no *) Create paths out of lines, arcs, etc. Set colors, fonts, textures, etc. Stroke or fill created paths to draw Push and Pop context to make temporary changes COMP 446 / ELEC 446 - Week 4
  25. Drawing Text and Images Text normally drawn through UILabel subclass NSString has methods to draw text using a UIFont object -(void) drawAtPoint: withFont:; //NSString method Images normally drawn through UIImageView subclass UIImage can be used to create an image from a file or many other things Can draw one through CGContext Can extract NSData class bits from UIImages COMP 446 / ELEC 446 - Week 4
  26. UIViewControllers Many important subclasses @property (nonatomic, strong) UIView *view; Is instantiated in one of two ways (not both): - (id) initWinthNibName: bundle:; [[UIViewControlleralloc] init];//xib and bundle are nil After initialized: viewDidLoad or Awake from Nib is called Before appearance: viewWillAppear: animated:; called. Other lifecycle methods: viewWillDisappear: animated: “did” versions of above Methods to handle rotation COMP 446 / ELEC 446 - Week 4
  27. Rotation - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)orientation { return UIInterfaceOrientationIsPortrait(orientation); // only support portrait return YES; // support all orientations return (orientation != UIInterfaceOrientationPortraitUpsideDown); // anything but } ComplementareyviewWillAutorotateToInterfaceOrientation: and viewDidAutorotate… Proper use of Struts and Springs in Storyboard will help keep things looking correct @property (nonatomic) UIViewContentModecontentMode; //determines how views redraw by default. COMP 446 / ELEC 446 - Week 4
  28. Protocols/Delegates and Target/Action Mechanism for crossing MVC boundaries Mechanism for customizing opaque designs Often sound scarier than they are COMP 446 / ELEC 446 - Week 4
  29. Target / Action When a controller wants a view to get back to it when something happens, it use Target / Action. The Target is the class instance to receive a message from the view when something happens The Action is the method sent to the Target when the trigger happens. View items, like buttons, can have multiple target/action pairs. A target and its associated method can be triggered by multiple situations. COMP 446 / ELEC 446 - Week 4
  30. Protocols, Delegates and DataSources Protocols define a set of required and optional methods and properties to accomplish something Protocols can be placed in an existing or a separate header file. Use @class className to forward reference a class Protocols can inherit other protocols – adding the inherited requirements and optional methods to their own Delegates are classes which publicize that they handle the requirements of a protocol. These classes get set as the delegate normally in a property of the class defining the protocol. It is safe to send a required protocol method to a class that states it handles a protocol. It must check respondsTo for optional methods. <myProtocol> is used to identify that a class responds to myProtocol Can also be added to an iVar or property. DataSources are Delagates handling data values COMP 446 / ELEC 446 - Week 4
  31. UIGestureRecognizer Abstract superclass for UIPanGestureRecognizer, UIPinchGR, UIRotationGR, UISwipeGR, UITapGR Recognition done in view. GestureRecognizer usually set up in controller Recognizer handled in view or controller as appropriate. Most recognizers handled in incremental mode where handler resets item that changed. COMP 446 / ELEC 446 - Week 4
  32. Controller of Controllers UINavigationController Extremely common stack of cards views UITabBarController Managing separate sections of an app UISplitViewController iPad specific Master/Slave view controller UITableViewController Efficient way to display a lot of data in a table form. Most often subclassed COMP 446 / ELEC 446 - Week 4
  33. UINavigationController Deep Dive view controller Managed push and pop of views showing more detail Top level object or as a section of a UITabBarController Instantiation: Create with alloc / init and add controller’s view property to view hierarchy Use Storyboard and embed controller in UINavigtionController UIViewControllers under a UINavigationController have a navigationController property used to push new views ViewControllers have strong pointers their views. COMP 446 / ELEC 446 - Week 4
  34. Segues Mechanism to transition from one MVC to another Most often setup in StoryBoard via control drag Remember to name the Segue Will receive prepareForSegue:Sender: Can be initiated solely in code COMP 446 / ELEC 446 - Week 4
  35. Protocols and Assignment #3 The Calculator is an MVC with the CalculatorBrain as the Model The Graphing MVC is supposed to be generic and use a protocol for its view’s data (valueAtPointX) Where should the protocol be defined? Where should the protocol be implemented? COMP 446 / ELEC 446 - Week 4
  36. Assignment #3 Questions COMP 446 / ELEC 446 - Week 4
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