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Wednesday 2-4, DH 1046

Wednesday 2-4, 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 10/12/11. Today’s Agenda. Events of the week

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Wednesday 2-4, DH 1046

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  1. Wednesday 2-4, 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 10/12/11

  2. Today’s Agenda • Events of the week • Final Project Schedule • Web Services(abbreviated) • Memory Management Summary Sheet • Controllers of Controllers, Gesture Recognizers • Review of current assignment • Next Week COMP 446 / ELEC 446 - Week 8

  3. Events of the Week • Apple's Steve Jobs has passed away • What I learned from Steve Jobs (Guy Kawasaki) • The 1971 article that inspired Steve Jobs • Apple iPhone 4S gets lukewarm analyst response • iPhone 4S preorders top 1 million in single day • Galaxy Nexus launch delayed due to Jobs' death • Unlocked iPhone 4S coming in November • Netflix cancels Qwiksterspinoff • Xbox 360 sales nearly double that of Wii's, analyst says • Amazon's Kindle Fire tablet hit by patent lawsuit • HP near decision on WebOS group, report says • Introducing Dart, Google's answer to JavaScript • Facebook accused of copying MyPad'siOSapp • RIM Hit With Worldwide BlackBerry Outage, Shareholder Unrest COMP 446 / ELEC 446 - Week 8

  4. COMP 446 Syllabus • 8/24/11 Introduction / What makes mobile apps special Videos: Lecture 1. Introduction to Cocoa Touch, Objective-C, Tools, and MVC (September 21, 2010) Lecture 2. Building a Simple Calculator (September 23, 2010) Assignment: #1 and #1 Walkthrough - Calculator Due: Preferably watch videos this week, definitely by 8/30. Assignment due 9/1/11. • 8/31/11 Discussion of first applications, Development Environment Videos: Lecture 3. Objective-C and Foundation Frameworks (September 28, 2010) Lecture 4. Foundation and Memory Management (September 30, 2010) Assignment: #2 Function Calculator (Due 9/15/11) • 9/7/11 Intro to Cocoa Touch, Objective-C, Using Objective-C, Foundation framework Videos: Assignment: • 9/14/11Memory Management Videos: Lecture 5. Protocols and Views (October 5, 2010) Lecture 6. Application & View Controller Lifecycle, Navigation Controller (October 7, 2010) Assignment: #3 Graphing Calculator (Due 9/22/11) • 9/21/11 iPhone (pseudo) Web Apps Videos: Lecture 7. More Controllers of Controllers, iPad, Universal Applications (October 12, 2010) Lecture 8. Gesture Recognizers (October 14, 2010) Assignment: #4 Universal Calculator (Due 9/29/11) COMP 446 / ELEC 446 - Week 8

  5. COMP 446 Syllabus • 9/28/11 Creating and Consuming Web Services Videos: Lecture 9. Image View, Web View, and Scroll View (October 19, 2010) Lecture 10. Table View (October 21, 2010)Assignment: #5 Pictures Places (Due 10/13/11) • 10/5/11 SQL 101 Videos: Lecture 11. Persistence (October 26, 2010) Lecture 12. Core Data and Table Views (October 28, 2010) Assignment: #6 Core Data Places (Due 10/20/11, but watch lectures prior to 10/12/11 class) • 10/12/11 Core Data Demo / Final Project discussion and Pairing Videos: Debugging Tools (October 22, 2010)Kleiner Perkins iFund (October 15, 2010) Assignment: Final Project Proposal (Due 10/18/11 along with Core Data Places due 10/20/11) • 10/19/11 iOS 5 Videos: Lecture 13. Blocks and Multithreading (November 2, 2010) Lecture 14. Core Location and Map Kit (November 9, 2010) Assignment: Final Project, Stage 1 (Due 10/27/11) • 10/26/11 Android Videos: Lecture 15. Editable Text, Modal View Controllers, and View Animation (Nov 11, 2010) Lecture 16. Core Motion, Segmented Control, and Alerts (November 16, 2010) Assignment: Advanced Feature App (Due 11/03/11) COMP 446 / ELEC 446 - Week 8

  6. COMP 446 Syllabus • 11/2/11 Windows Phone 7, Final Project Prep Videos: Lecture 17. Media (November 18, 2010) Lecture 18. Accessibility on iOS: Make an App for Everyone (November 30, 2010) Assignment: Final Project, Stage 2 (Due 11/10/2011) • 11/09/11 Final Project Prep / iPhone v. Android v. Windows Phone 7 group discussion Videos: Lessons from Bezos, Pincus, Young: CEO 2.0 (November 12, 2010) (Optional) LinkedIn: Shipping with CoreData (November 5, 2010) (Optional) Assignment: Final Project, Stage 3 (Due 11/17/2011) • 11/16/11 Final Project Prep Videos: Building Flipboard (November 19, 2010) (Optional) Assignment: Final Project Presentation (Due 11/30/2011) • 11/23/11 Thanksgiving – Continue Final Projects on your own • 11/30/11 Demonstrate Final Projects to class • 12/4/11 Class Offsite – Sunday (tentative) • Finals Submission of final code due by official finals date COMP 446 / ELEC 446 - Week 8

  7. Core Data Uses Big Words • NSManagedObject • Just an object representing something from the database • NSManagedObjectContext • Similar to CGContextRef • Simple call to get via method in App Delegate automatically created if you select Core Data (difficult to add Core Data if not set at beginning) • NSFetchRequest • For getting items from the database • NSSortDescriptor • For describing one layer of sorts • NSArray of NSSortDescriptors given to NSFetchRequest • NSPredicate or NSCompoundPredicate • Condition clause to determine which records match request • NSCompoundPredicate used when there are multiple conditions COMP 446 / ELEC 446 - Week 8

  8. Using Managed Objects • Get a context • self.managedObjectContext • <managedObject>.managedObjectContext • Save a context • self.saveContext • Create objects • [NSEntityDescriptioninsertNewObjectForEntityForName(NSString *)inManagedObjectContext:(NSManagedObjectContext *)]; • Fetch via NSFetchRequest COMP 446 / ELEC 446 - Week 8

  9. NSFetchRequest • NSFetchRequest *request = [[NSFetchRequestalloc] init]; • request.entity = [MSEntityDescriptionentityForName:xxxinManagedObjectContext:yyy]; • request.fetchBatchSize= • request.fetchLimit = • request.sortDescriptors=[NSArrayarrayWithObject:sortDescriptor]; • request.predicate= … COMP 446 / ELEC 446 - Week 8

  10. NSPredicate • [NSPredicatepredicateWithFormat:@”object <adverb> %@”, value]; • Examples • @”uniqueId=%@”, value • @“%@ in tags”, (NSManagedObject *) • @“viewed > %@”, (NSDate *) • @name contains[c] %@”. (NSString *) • Use a compound predicate to include And and Or COMP 446 / ELEC 446 - Week 8

  11. NSSortDescriptor • Array of sort descriptors used in NSFetchRequest • [[NSSortDescriptoralloc] initWithKey:@”foo” ascending:(BOOL)]; • Optional selector argument COMP 446 / ELEC 446 - Week 8

  12. Core Data Demo • Fetch a lost of photos from Flickr • Display a table view full of the photographers who took those photos • Push a list of that photographer’s photos when the photographer is clicked on • Display a photo in a UIScrollView when a photo is clicked on (not in Demo) • Basically same demo as in the CS193p video COMP 446 / ELEC 446 - Week 8

  13. Core Data Demo Steps #1 • Create new Window Based app (Bugshutter) (Taken from CS193p Shutterbug) • Using Core Data • Create Photo and Photographer entities • Starts off as NSManagedObject. Will be updated when classes written. • Photo Attribute – imageURL (String) • Photo Attribute – title (string) • Photo Attribute – uniqueId (string) • Photographer Attribute – name (string) • Photographer Relationship – photos, To-Many, Destination Photo, No inverse yet • Photo Relationship – whoTook, Destination Photographer, Inverse photos, not Too Many • Create custom classes by: • Click on one, Create new file of type Managed Object Class, (Editor – Create NSManagedObject Subclass), Select all objects, move into classes • Import CoreDataTableViewController and FlickerFetcher (and JSON) Classes (with copy) • Make sure recentGeoreferencedPhotos is in FlickrFetcher • Add code to get photos from Flickr to AppDelegate • Import FlickrFetcher.h, • NSArray *photos =[FlickrFetcherrecentGeoreferencedPhotos]; • for (NSDictionary *photoInfo in photos){} • In Photo.h, add method + (Photo *)photoWithFlickrData:(NSDictionary *)flickrDatainManagedObjectContext:(NSManagedObjectContext *)context; COMP 446 / ELEC 446 - Week 8

  14. Core Data Demo Steps #2 • In Photo.m create: + (Photo *)photoWithFlickrData:(NSDictionary *)flickrDatainManagedObjectContext:(NSManagedObjectContext *)context{ Photo *photo=nil;NSFetchRequest *request = [[NSFetchRequestalloc] init];request.entity = [NSEntityDescriptionentityForName:@”Photo” inManagedObjectContext:context];request.predicate = [NSPredicatepredicateWithFormat:@”uniqueId=%@”, [flickrDataobjectForKey:@”id”]];NSError *error = nil; photo = [[context executeFetchRequest:request error:&error] lastObject]; if (!error && !photo) { photo = [NSEntityDescriptioninsertNewObjectForEntityForName:@”Photo” inManagedObjectContext:context];photo.uniqueId = [flickrDataobjectForKey:@”id”];photo.title = [flickrDataobjectForKey:@”title”];photo.imageURL = [FlickrFetcherurlStringForPhotoWithFlickrInfo:flickrDataformat:FlickrFetcherPhotoFormateLarge];photo.whoTook = [Photographer photographerWithFlickrData:flickrDatainManagedObjectContext:context]; } return photo;} • #import FlickerFetcher.h and Photographer.h • In Photographer.m, copy and past photoWithFlickData code. COMP 446 / ELEC 446 - Week 8

  15. Core Data Demo Steps #3 • In Photographer.m, copy and past photoWithFlickData code. • + (Photographer*)photographerWithFlickrData:(NSDictionary *)flickrDatainManagedObjectContext:(NSManagedObjectContext *)context{ Photographer *photographer=nil;NSFetchRequest *request = [[NSFetchRequestalloc] init];request.entity = [NSEntityDescriptionentityForName:@”Phototographer” inManagedObjectContext:context];request.predicate = [NSPredicatepredicateWithFormat:@”name=%@”, [flickrDataobjectForKey:@”ownername”]];NSError *error = nil; photographer = [[context executeFetchRequest:request error:&error] lastObject]; if [!error && !photographer) {photographer = [NSEntityDescriptioninsertNewObjectForEntityForName:@”Photographer” inManagedObjectContext:context]; photographer.name = [flickrDataobjectForKey:@”ownername”];photo.title = [flickrDataobjectForKey:@”title”];photo.imageURL = [FlickrFetcherurlStringForPhotoWithFlickrInfo:flickrDataformat:FlickrFetcherPhotoFormateLarge];photo.whoTook=[Photographer photographerWithFlickrData:flickrDatainManagedObjectContext:context]; }return photographer;} • In Photographer.h, add: + (Photographer*)photographerWithFlickrData:(NSDictionary *)flickrDatainManagedObjectContext:(NSManagedObjectContext *)context; COMP 446 / ELEC 446 - Week 8

  16. Core Data Demo Steps #4 • Back in AppDelegate, add #import “Photo.h” and finish didFinish…. • NSArray *photos =[FlickrFetcherrecentGeoreferencedPhotos];for (NSDictionary *photoInfo in photos){Photo *photo = [Photo photoWithFlickrData:photoInfoinManagedObjectContext:self.managedObjectContext];} [self saveContext]; • File, new Class PhotographersTableViewController • #import “CoreDataTableViewController.h” • Subclass of :CoreDataTableViewController • - initInManagedObjectContext: (NSManagedObjectContext *)context; COMP 446 / ELEC 446 - Week 8

  17. Core Data Demo Steps #5 • PhotographersTableViewController.m • - initInManagedObjectContext: (NSManagedObjectContext *)context{ if (self = [super initWithStyle:UITableViewStylePlain]) {NSFetchRequest *request = [[NSFetchRequestalloc] init];request.entity = [NSEntityDescriptionentityForName:@”Photographer” inManagedObjectContext:context];request.sortDescriptors=[NSArrayarrayWithObject:[NSSortDescriptorsortDescriptorWithKey:@”name” ascending:YES]request.predicate = nil;request.fetchBatchSize = 20;NSFetchedResultsController *frc = [[NSFetchedResultsControlleralloc]initWithFetchRequest:requestmanagedObjectContext:contextsectionNameKeyPath: nil cacheName:@”MyPhotoCache”]; [request release];self.fetchedResultsController=frc; [frc release];self.titleKey = @”name”; }return self;} • -(void) managedObjectSelected:(NSManagedObject *)managedObject{} COMP 446 / ELEC 446 - Week 8

  18. Core Data Demo Steps #6 • Back in AppDelegate, add #import “PhotographersTableViewController.h” and finish didFinish…. • NSArray *photos =[FlickrFetcherrecentGeoreferencedPhotos];for (NSDictionary *photoInfo in photos){Photo *photo = [Photo photoWithFlickrData:photoInfoinManagedObjectContext:self.managedObjectContext];} [self saveContext];PhotographersTableViewController *ptvc = [[PhotographersTableViewControlleralloc] initInManagedObjectContext:self.managedObjectContext];UINavigationController *navcon = [[UINavigationControlleralloc] init];[navconpushViewController:ptvcannimated:NO];[self.windowaddSubview:navcon.view];[self.windowmakeKeyAndVisible];return YES; COMP 446 / ELEC 446 - Week 8

  19. Core Data Demo Steps #7 • Create PhotosByPhotographerTableViewController • Import #”CoreDataTableViewController.h” and “Photographer.h). Subclass CoreTableViewController • -initWithPhotographer:(Photographer *)photographer; //(not inManagedObjectContext) • Copy and paste from PhotographersTableViewController.m • -initWithPhotographer:(Photographer *)photographer{NSManagedObjectContext *context=photographer.managedObjectContext; if (self = [super initWithStyle:UITableViewStylePlain]) {NSFetchRequest *request = [[NSFetchRequestalloc] init];request.entity = [NSEntityDescriptionentityForName:@”Photo” inManagedObjectContext:context];request.sortDescriptors=[NSArrayarrayWithObject:[NSSortDescriptorsortDescriptorWithKey:@”title” ascending:YES]request.predicate = [NSPredicatepredicateWithFormat:@”whoTook=%@”, photographer];request.fetchBatchSize = 20;NSFetchedResultsController *frc = [[NSFetchedResultsControlleralloc]initWithFetchRequest:requestmanagedObjectContext:contextsectionNameKeyPath: nil cacheName:nil];request release];self.fetchedResultsController=frc;[frc release];self.titleKey = @”title”;} • -(void) managedObjectSelected:(NSManagedObject *)managedObject{} COMP 446 / ELEC 446 - Week 8

  20. Core Data Demo Steps #8 • Back in PhotographersTableViewController.m • #import “PhotosByPhotographerTableViewController.h” • -(void) managedObjectSelected:(NSManagedObject *)managedObject{ Photographer *photographer = (Photographer *)managedObject;PhotosByPhotographerTableViewController *pbptvc=[[PhotosByPhotographerTableViewControlleralloc] initWithPhotographer:photographer]; [self.navigationControllerpushViewController:pbptvcanimated:YES]; [pbptvc release];} COMP 446 / ELEC 446 - Week 8

  21. Assignment #6 • Staggered overlapping due date with Assignment #5 • Three major parts • Core Data version of Assignment #5 • Addition of Favorite Places • Caching of image data to sandbox • Item 1 required, Items 2 and 3 required if you want possibility of A+ in class • While not required, if you want to create great apps, you should also do Assignment #7 – multi thread • Items 2 and 3 can be submitted at any time before last class • WATCH THE DEMO IN VIDEO 12 or Today’s class COMP 446 / ELEC 446 - Week 8

  22. Week 9 • CS193p Assignment #6 (partial) • Assignment #6 due 10/20/2011. • Optional parts due anytime before last day of classes. Required for a chance to get an A+ • Videos Optional from this point on • See Syllabus for Video suggestions • You will receive feedback on Final Project and Assignment #5 • Main activity after Assignment #6 is final project COMP 446 / ELEC 446 - Week 8

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