eric e. dolecki

Labels: iPhone

- (void)viewDidLoad {
 NSString *mainPath = [[NSBundle mainBundle] bundlePath];
 NSURL *baseURL = [NSURL fileURLWithPath:mainPath];
 NSString *path = [[NSBundle mainBundle] pathForResource:@"default.html" ofType:nil]; 
 NSString *pageHTML = [NSString stringWithContentsOfFile:path encoding:NSASCIIStringEncoding error:nil]; 
 [webView loadHTMLString:pageHTML baseURL:baseURL];
    [super viewDidLoad];
}

Labels: iPhone

Labels: iPhone

Labels: AS3, iPhone

Labels: iPhone

#define DEGREES_TO_RADIANS(__ANGLE__) ((__ANGLE__) / 180.0 * M_PI)
- (void) showActivity {
 NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
 unsigned unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit| NSMinuteCalendarUnit |NSSecondCalendarUnit;
 NSDate *date = [NSDate date];
 NSDateComponents *comps = [gregorian components:unitFlags fromDate:date];
 int h = [comps hour];
 int m = [comps minute];
 int s = [comps second];
 
 CGAffineTransform cgaRotateHr = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(h * 30));
 CGAffineTransform cgaRotateMin = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(m * 6));
 CGAffineTransform cgaRotateSec = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(s * 6));
 
 [hrHand setTransform:cgaRotateHr];
 [minHand setTransform:cgaRotateMin];
 [secondHand setTransform:cgaRotateSec];

 NSDateFormatter *formatter = [[[NSDateFormatter alloc] init] autorelease];
 [formatter setTimeStyle:NSDateFormatterMediumStyle];
 [clockLabel setText:[formatter stringFromDate:date]];
}

CABasicAnimation* animation = [CABasicAnimation animationWithKeyPath: @"transform"];
[[secondHand layer]addAnimation:animation forKey:@"transform"];
[[hrHand layer]addAnimation:animation forKey:@"transform"];
[[minHand layer]addAnimation:animation forKey:@"transform"];

Labels: CABasicAnimation, Interpolation, iPhone

@interface YourAppDelegate : NSObject <UIApplicationDelegate> {
    UIWindow *window;
    YourAppViewController *viewController;
    UIImageView *splashView;
}
- (void)startupAnimationDone:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context;

- (void)startupAnimationDone:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {
 [splashView removeFromSuperview];
 [splashView release];
}

- (void)applicationDidFinishLaunching:(UIApplication *)application {    
    
    [window addSubview:viewController.view];
    [window makeKeyAndVisible];
 
 // Make this interesting.
 splashView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0, 320, 480)];
 splashView.image = [UIImage imageNamed:@"Default.png"];
 [window addSubview:splashView];
 [window bringSubviewToFront:splashView];
 [UIView beginAnimations:nil context:nil];
 [UIView setAnimationDuration:2.0];
 [UIView setAnimationTransition:UIViewAnimationTransitionNone forView:window cache:YES];
 [UIView setAnimationDelegate:self]; 
 [UIView setAnimationDidStopSelector:@selector(startupAnimationDone:finished:context:)];
 splashView.alpha = 0.0;
 splashView.frame = CGRectMake(-60, -85, 440, 635);
 [UIView commitAnimations];
}

Labels: iPhone

- (void)onTimer:(NSTimer *)timer {
 long currentPlaybackTime = self.musicPlayer.currentPlaybackTime;
 int currentHours = (currentPlaybackTime / 3600);
 int currentMinutes = ((currentPlaybackTime / 60) - currentHours*60);
 int currentSeconds = (currentPlaybackTime % 60);
 self.currentLabel.text = [NSString stringWithFormat:@"%i:%02d:%02d", currentHours, currentMinutes, currentSeconds];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.musicPlayer = [MPMusicPlayerController iPodMusicPlayer];
 
    // Initial sync of display with music player state
    [self handleNowPlayingItemChanged:nil];
    [self handlePlaybackStateChanged:nil];
    [self handleExternalVolumeChanged:nil];
    
    // Register for music player notifications
    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
    [notificationCenter addObserver:self 
                           selector:@selector(handleNowPlayingItemChanged:)
                               name:MPMusicPlayerControllerNowPlayingItemDidChangeNotification 
                             object:self.musicPlayer];
    [notificationCenter addObserver:self 
                           selector:@selector(handlePlaybackStateChanged:)
                               name:MPMusicPlayerControllerPlaybackStateDidChangeNotification 
                             object:self.musicPlayer];
    [notificationCenter addObserver:self 
                           selector:@selector(handleExternalVolumeChanged:)
                               name:MPMusicPlayerControllerVolumeDidChangeNotification 
                             object:self.musicPlayer];
    [self.musicPlayer beginGeneratingPlaybackNotifications];
 currentTimer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(onTimer:) userInfo:nil repeats:YES];
}

- (void)handleNowPlayingItemChanged:(id)notification {
    MPMediaItem *currentItem = self.musicPlayer.nowPlayingItem;
    self.songLabel.text   = [currentItem valueForProperty:MPMediaItemPropertyTitle];
    self.artistLabel.text = [currentItem valueForProperty:MPMediaItemPropertyArtist];
    self.albumLabel.text  = [currentItem valueForProperty:MPMediaItemPropertyAlbumTitle];     
 
 // Current Playback Value - via the running timer
 
 // The total duration of the track...
 long totalPlaybackTime = [[[musicPlayer nowPlayingItem] valueForProperty: @"playbackDuration"] longValue];
 int tHours = (totalPlaybackTime / 3600);
 int tMins = ((totalPlaybackTime/60) - tHours*60);
 int tSecs = (totalPlaybackTime % 60 );
 self.durationLabel.text = [NSString stringWithFormat:@"%i:%02d:%02d", tHours, tMins, tSecs ];
 
    // Display album artwork. self.artworkImageView is a UIImageView.
    CGSize artworkImageViewSize = self.artworkImageView.bounds.size;
    MPMediaItemArtwork *artwork = [currentItem valueForProperty:MPMediaItemPropertyArtwork];
    if (artwork != nil) {
        self.artworkImageView.image = [artwork imageWithSize:artworkImageViewSize];
    } else {
        self.artworkImageView.image = nil;
    }
}

Labels: iPhone

- (EASession *)openSessionForProtocol:(NSString *)protocolString {
   NSArray *accessories = [[EAAccessoryManager sharedAccessoryManager]
      connectedAccessories];
   EAAccessory *accessory = nil;
   EASession *session = nil;

   for (EAAccessory *obj in accessories) {
       if ([[obj protocolStrings] containsObject:protocolString]){
           accessory = obj;
           break;
       }
   }

   if (accessory){
       session = [[EASession alloc] initWithAccessory:accessory
            forProtocol:protocolString];
       if (session) {
           [[session inputStream] setDelegate:self];
           [[session inputStream] scheduleInRunLoop:[NSRunLoop currentRunLoop]
           forMode:NSDefaultRunLoopMode];
           [[session inputStream] open];
           [[session outputStream] setDelegate:self];
           [[session outputStream] scheduleInRunLoop:[NSRunLoop currentRunLoop]
            forMode:NSDefaultRunLoopMode];
           [[session outputStream] open];
           [session autorelease];
       }
   }
   return session;
}

// Handle communications from the streams.
- (void)stream:(NSStream*)theStream handleEvent:(NSStreamEvent)streamEvent
{
   switch (streamEvent)
   {
       // case NSStreamHasBytesAvailable: this was incorrect in Apple documentation...
       case NSStreamEventHasBytesAvailable:
           // Process the incoming stream data.
           break;
        case NSStreamEventHasSpaceAvailable:
           // Send the next queued command.
           break;
        default:
           break;
   }
}

Labels: ExternalAccessory, iPhone, Objective-C

When I set out to jump into iPhone development, I knew that I wanted to collect a lot of material that I could read through.

I printed tons of pages found on the internet, and I also purchased a few books on the subject. I keep two on my desk at all times: Beginning iPhone Development (Exploring the iPhone SDK) by Dave Mark and Jeff LaMarche, and The iPhone Developer's Cookbook.

I refer to them every now and then in case I forget something pretty silly and need a quick reference. And yes, I am also guilty of opening up previous Projects looking for techniques I used before that I want to employ again. I just did that twenty minutes ago. I'm sure I'll do it again before the close of the day.

But what's the point of this post? You see, the Beginning iPhone 3 Development book is new, but it's not completely new. A little sprinkling of Core Data has been added and some Table View styling. That's about it.

If you are into the new stuff in the 3.0 SDK (GameKit, MapKit, Push Notifications, In-App Purchase, more Core Data, etc.) then you want to wait for the book from the same guys to be called More iPhone 3 Development. So check Amazon every now and then. These guys put together really fine books, so you'll be well-served. Just don't get the new one they just put out thinking it's going to cover SDK 3.0 in any great detail.

Labels: books, iPhone

#import "ClickThroughViewController.h"
#import <QuartzCore/QuartzCore.h>

@implementation ClickThroughViewController
@synthesize imageView, imageViewTop, aboutView, aboutButton, 
   advanceButton, backButton, label, gestureStartPoint, dirString;

- (void)updateLabel {
 NSString *c = [[NSString alloc] initWithFormat:@"%i", count];
 label.text = c;
 [c release];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
 UITouch *touch = [touches anyObject];
 gestureStartPoint = [touch locationInView:self.view];
 dirString = NULL;
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
 UITouch *touch = [touches anyObject];
 CGPoint currentPosition = [touch locationInView:self.view];
 if(fabsf(gestureStartPoint.x - currentPosition.x ) >= kMinimumGestureLength && fabsf(gestureStartPoint.y - currentPosition.y) <= kMaximumVariance){
  //Horizontal Swipe
  if( gestureStartPoint.x < currentPosition.x ){
   dirString = @"fromLeft";
  } else {
   dirString = @"fromRight";
  }
 }
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { 
 if( [dirString isEqualToString:@"fromLeft"] ){
  [self prevImage];
 } else if( [dirString isEqualToString:@"fromRight"]){
  [self nextImage];
 }
}

/*
 You need to make sure the prototype images that you use are JPGs
 and use the "image_" convention, otherwise the total count will
 be off and your application will bork.
*/
- (void)viewDidLoad {
 
 UIImage *img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"image_1.jpg" ofType:nil]];
 UIImage *img2 = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"image_1.jpg" ofType:nil]];
 imageView.image = img2;
 imageViewTop.image = img;
 imageView.hidden = YES;
 totalCount = 0;
 aboutShowing = NO;
 
 NSArray *d = [[NSBundle mainBundle] pathsForResourcesOfType:@"jpg" inDirectory:nil];
 for(NSString *s in d){
  if([[s lastPathComponent] hasPrefix:@"image_"]){
   totalCount++;
  }
 }
 count = 1;
 prev = totalCount;
 label.alpha = 0;
 
 [self updateLabel];
    [super viewDidLoad];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning]; 
}

- (void)dealloc {
 [imageView release];
 [backButton release];
 [advanceButton release];
    [super dealloc];
}

// #pragma isn't very cool in my opinion, so...
//MARK: Custom Code

- (IBAction)advanceImage:(id)sender {
 [self nextImage];
}

- (void)nextImage {
 count++;
 if( count > totalCount ){
  count = 1;
 }
 if( count == 1 ){
  prev = totalCount;
 } else {
  prev = count - 1;
 }
 [self updateLabel];
 
 NSString *tmp = [[NSString alloc] initWithFormat:@"image_%i", count];
 NSString *old = [[NSString alloc] initWithFormat:@"image_%i", prev];
 UIImage *img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:tmp ofType:@"jpg"]];
 UIImage *img2 = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:old ofType:@"jpg"]];
 
 imageView.image = img2;
 imageViewTop.image = img;
 label.alpha = 1;
 
 CGContextRef context = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context];
 [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:[self imageViewTop] cache:YES];
 [UIView setAnimationDuration:0.5];
 [UIView commitAnimations];
 
 CGContextRef context2 = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context2];
 [UIView setAnimationDuration:1.0];
 label.alpha = 0;
 [UIView commitAnimations];
}

- (IBAction)aboutChange:(id)sender {
 if( !aboutShowing ){
  aboutShowing = YES;
  aboutView.hidden = NO;
  aboutView.frame = CGRectMake(0, -50, 320, 480);
  aboutView.alpha = 0.0;
  CGContextRef context = UIGraphicsGetCurrentContext();
  [UIView beginAnimations:nil context:context];
  [UIView setAnimationDuration:1.0];
  aboutView.frame = CGRectMake(0, 0, 320, 480);
  aboutView.alpha = 1.0;
  [UIView commitAnimations];

 } else {
  aboutShowing = NO;  
  CGContextRef context2 = UIGraphicsGetCurrentContext();
  [UIView beginAnimations:nil context:context2];
  [UIView setAnimationDuration:1.0];
  aboutView.frame = CGRectMake(0, -50, 320, 480);
  aboutView.alpha = 0.0;
  [UIView commitAnimations];
 }
}

- (IBAction)backImage:(id)sender {
 [self prevImage];
}

- (void)prevImage {
 count--;
 if( count < 1 ){
  count = totalCount;
 }
 if( count == 1 ){
  prev = totalCount;
 } else {
  prev = count + 1;
 }
 [self updateLabel];
 NSString *tmp = [[NSString alloc] initWithFormat:@"image_%i", count];
 NSString *old = [[NSString alloc] initWithFormat:@"image_%i", prev];
 UIImage *img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:tmp ofType:@"jpg"]];
 UIImage *img2 = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:old ofType:@"jpg"]];
 imageView.image = img2;
 imageViewTop.image = img;
 label.alpha = 1;
 
 CGContextRef context = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context];
 [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:[self imageViewTop] cache:YES];
 [UIView setAnimationDuration:0.5];
 [UIView commitAnimations];
 
 CGContextRef context2 = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context2];
 [UIView setAnimationDuration:1.0];
 label.alpha = 0;
 [UIView commitAnimations];
}

@end

Labels: iPhone, Objective-C

Labels: Conference, iPhone

#import "ClickThroughViewController.h"
#import <quartzcore/quartzcore.h>

@implementation ClickThroughViewController
@synthesize imageView, imageViewTop, aboutView, aboutButton, advanceButton, backButton, label;

- (void)updateLabel {
NSString *c = [[NSString alloc] initWithFormat:@"%i", count];
label.text = c;
[c release];
}

/*
You need to make sure the prototype images that you use are JPGs
and use the "image_" convention, otherwise the total count will
be off and your application will bork.
*/
- (void)viewDidLoad {
UIImage *img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"image_1.jpg" ofType:nil]];
UIImage *img2 = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"image_6.jpg" ofType:nil]];
imageView.image = img2;
imageViewTop.image = img;
imageView.hidden = YES;
totalCount = 0;
aboutShowing = NO;

NSArray *d = [[NSBundle mainBundle] pathsForResourcesOfType:@"jpg" inDirectory:nil];
for(NSString *s in d){
 if([[s lastPathComponent] hasPrefix:@"image_"]){
  totalCount++;
 }
}
count = 1;
prev = totalCount;
label.alpha = 0;
[self updateLabel];
   [super viewDidLoad];
}

- (void)didReceiveMemoryWarning {
   [super didReceiveMemoryWarning];
}

- (void)dealloc {
[imageView release];
[backButton release];
[advanceButton release];
   [super dealloc];
}

// #pragma isn't very cool in my opinion, so...
//MARK: Custom Code

- (IBAction)advanceImage:(id)sender {
count++;
if( count > totalCount ){
 count = 1;
}
if( count == 1 ){
 prev = totalCount;
} else {
 prev = count - 1;
}
[self updateLabel];

NSString *tmp = [[NSString alloc] initWithFormat:@"image_%i", count];
NSString *old = [[NSString alloc] initWithFormat:@"image_%i", prev];
UIImage *img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:tmp ofType:@"jpg"]];
UIImage *img2 = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:old ofType:@"jpg"]];

imageView.image = img2;
imageViewTop.image = img;
label.alpha = 1;

CGContextRef context = UIGraphicsGetCurrentContext();
[UIView beginAnimations:nil context:context];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:[self imageViewTop] cache:YES];
[UIView setAnimationDuration:0.5];
[UIView commitAnimations];

CGContextRef context2 = UIGraphicsGetCurrentContext();
[UIView beginAnimations:nil context:context2];
[UIView setAnimationDuration:1.0];
label.alpha = 0;
[UIView commitAnimations];
}

- (IBAction)aboutChange:(id)sender {
if( !aboutShowing ){
 aboutShowing = YES;
 aboutView.hidden = NO;
 aboutView.frame = CGRectMake(0, -50, 320, 480);
 aboutView.alpha = 0.0;
 CGContextRef context = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context];
 [UIView setAnimationDuration:1.0];
 aboutView.frame = CGRectMake(0, 0, 320, 480);
 aboutView.alpha = 1.0;
 [UIView commitAnimations];

} else {
 aboutShowing = NO; 
 CGContextRef context2 = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context2];
 [UIView setAnimationDuration:1.0];
 aboutView.frame = CGRectMake(0, -50, 320, 480);
 aboutView.alpha = 0.0;
 [UIView commitAnimations];
}
}

- (IBAction)backImage:(id)sender {
 count--;
 if( count < 1 ){
  count = totalCount;
 }
 if( count == 1 ){
  prev = totalCount;
 } else {
  prev = count + 1;
 }
 [self updateLabel];
 NSString *tmp = [[NSString alloc] initWithFormat:@"image_%i", count];
 NSString *old = [[NSString alloc] initWithFormat:@"image_%i", prev];
 UIImage *img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:tmp ofType:@"jpg"]];
 UIImage *img2 = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:old ofType:@"jpg"]];
 imageView.image = img2;
 imageViewTop.image = img;
 label.alpha = 1;
 
 CGContextRef context = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context];
 [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:[self imageViewTop] cache:YES];
 [UIView setAnimationDuration:0.5];
 [UIView commitAnimations];
 
 CGContextRef context2 = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context2];
 [UIView setAnimationDuration:1.0];
 label.alpha = 0;
 [UIView commitAnimations];
}

@end

Labels: iPhone, Objective-C, Xcode

There is an open-source graphing library available for both Mac OS X and the iPhone called CorePlot. If you've gotten accustomed to the graphing packages available for Flex and Flash applications, you'll get a little tingle when you see this graphic library.

In order to integrate into your iPhone application, after checking the code out of the repository or downloading you can follow this information:

Because frameworks cannot be used in Cocoa Touch applications in the same way as on the Mac, the means of including Core Plot within an iPhone application are slightly different.

First, drag the CorePlot-CocoaTouch.xcodeproj file into your iPhone application's Xcode project (making sure that nothing's copied and the paths are relative to your project). Then go to the Targets tab in Xcode, select your application's target, and bring up the inspector. Go to the General settings page and add the CorePlot-CocoaTouch library as a direct dependency.

Core Plot is built as a static library for iPhone, so you'll need to drag the libCorePlot-CocoaTouch.a static library from under the CorePlot-CocoaTouch.xcodeproj group to your target's Link Binary With Libraries folder.

You'll also need to point to the right header location. Under your Build settings, set the Header Search Paths to the relative path from your application to the framework/ subdirectory within the Core Plot source tree. Make sure to make this header search path recursive. You need to add -ObjC to Other Linker Flags as well.

Core Plot is based on Core Animation, so if you haven't already, add the QuartzCore framework to your application project.

Finally, you should be able to import all of the Core Plot classes and data types by inserting the following line in the appropriate source files within your project:

#import "CorePlot-CocoaTouch.h

I have yet to try this out myself since I don't immediately have a need for it, but I am seeing some people encountering problems with the steps outlined. They get a EXC_BAD_ACCESS error. Perhaps this library isn't set up in it's downloaded form properly and may require some tinkering to get it rolling properly. Here is the Issues List where you can tool around to see what problems currently exist that have been commented upon.

Labels: Graphing, iPhone

Labels: Amazon, iPhone

Labels: iPhone, Objective-C, Simulator

totalCount = 0;
NSArray *d = [[NSBundle mainBundle] pathsForResourcesOfType:@"jpg" inDirectory:nil];
 for(NSString *s in d){
  if([[s lastPathComponent] hasPrefix:@"image_"]){
   totalCount++;
  }
 }

totalCount = 0;
NSArray *d = [[NSBundle mainBundle] pathsForResourcesOfType:@"jpg" inDirectory:nil];
for( int i=0;i<[d count];i++){
  NSString *searchForMe = @"image_";
  NSString *s = [[NSString alloc] initWithString:[d objectAtIndex:i]];
  NSRange range = [s rangeOfString:searchForMe];
  if( range.location != NSNotFound ){
   totalCount++;
  }
 }

NSUInteger jpegCount = [[[NSBundle mainBundle] pathsForResourcesOfType:@"jpg" inDirectory:subDirName] count];

NSMutableArray * imageArray = [[NSMutableArray alloc] init];
    NSEnumerator * imageBundlePathEnumerator = [[[NSBundle mainBundle] pathsForResourcesOfType: @"jpg" inDirectory: nil] objectEnumerator];
    NSString * imageBundlePath = nil;

    while (imageBundlePath = [imageBundlePathEnumerator nextObject])
    {
        [imageArray addObject: [[[NSImage alloc] initWithContentsOfFile: imageBundlePath] autorelease]];
    }

    NSLog(@"Number of images loaded : %d", [imageArray count]);

    NSImage * anImage = nil;
    NSEnumerator * imageEnumerator = [imageArray objectEnumerator];

    while (anImage = [imageEnumerator nextObject])
    {
        NSLog(@"image = %@", anImage);
    }

Labels: iPhone, Objective-C

• RGBA8888 (32-bit) (kTexture2DPixelFormat_RGBA8888)
• RGBA4444 (16-bit) (kTexture2DPixelFormat_RGBA4444)
• RGB5_A1 (16-bit)(kTexture2DPixelFormat_RGB5A1)
• RGB565 (16-bit) (kTexture2DPixelFormat_RGB565)

• 8 bits are assigned to the red channel, 8 bits to the green channel, 8 bits to the blue channel and 8 bits to the alpha channel.
• Use this pixel format when you need the maximum possible quality for your image.
• But it will consume the double of memory compared to 16-bit textures. Memory is a precious resource on the iPhone
• Usually it is also slower to render.
• Useful for: background image of your intro scene, and for images with lots of gradient colors

• 4 bits are assigned to the red channel, 4 bits to the green channel, 4 bits to the blue channel, and 4 bits to the alpha channel
• It gives you good quality in all channels, good speed, good memory consumption.
• Useful for: sprites that have different values of transparency

• 5 bits are assigned to the red channel, 5 bits to the green channel, 5 bits to the blue channel, and only 1 bit to the alpha channel
• It gives you good quality in RGB channels but poor quality on the A channel. It also gives you good speed and good memory consumption.
• Useful for: sprites that have transparent parts, but the transparency is either On or Off

• 5 bits are assigned to the red channel, 6 bits to the green channel, and 5 bits to the blue channel. It has no alpha channel support
• It gives you the best possible quality for 16-bit textures, but without alpha channel support.
• Useful for: background images in your game.

// Set the pixel format before loading the image
// RGBA 8888 image (32-bit)
[Texture2D setDefaultAlphaPixelFormat:kTexture2DPixelFormat_RGBA8888];
Sprite *sprite1 = [Sprite spriteWithFile:@"test-rgba1.png"];

// Set the pixel format before loading the image
// RGBA 4444 image (16-bit)
[Texture2D setDefaultAlphaPixelFormat:kTexture2DPixelFormat_RGBA4444];
Sprite *sprite2 = [Sprite spriteWithFile:@"test-rgba2.png"];

// Set the pixel format before loading the image
// RGB5A1 image (16-bit)
[Texture2D setDefaultAlphaPixelFormat:kTexture2DPixelFormat_RGB5A1];
Sprite *sprite3 = [Sprite spriteWithFile:@"test-rgba3.png"];

// Set the pixel format before loading the image
// RGB565 image (16-bit)
[Texture2D setDefaultAlphaPixelFormat:kTexture2DPixelFormat_RGB565];
Sprite *sprite4 = [Sprite spriteWithFile:@"test-rgba4.png"];

// restore the default pixel format
[Texture2D setDefaultAlphaPixelFormat:kTexture2DPixelFormat_Default];

Labels: cocos2d, iPhone, pixel format

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
 [tableView deselectRowAtIndexPath:indexPath animated:YES];
 //NSLog(@"%d:%d", [indexPath row], [indexPath section] );
 // Need to get to the cell
 UITableViewCell *newCell = [tableView cellForRowAtIndexPath:indexPath];
 UILabel *cellLabel = (UILabel *)[newCell.contentView viewWithTag:1];
 NSLog( @"%@", [cellLabel text] );
}

...
labelThree = [[[UILabel alloc] initWithFrame:CGRectMake( 65, 34, 200, 25)] autorelease];
labelThree.tag = 3;
labelThree.font = [UIFont systemFontOfSize:10.0];
labelThree.backgroundColor = [UIColor clearColor];
labelThree.textColor = UIColorFromRGB(0x555555);
labelThree.highlightedTextColor = [UIColor whiteColor]; // Why didn't I know about this!!!
labelThree.text = [NSString stringWithFormat:@"%@", [[photoArray objectAtIndex:row] objectForKey:@"rating"]];
...

Labels: iPhone, Objective-C, UITableView

//This works, but come on...
cell.textColor = [UIColor grayColor];

#define UIColorFromRGB(rgbValue) [UIColor \
    colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 \
    green:((float)((rgbValue & 0xFF00) >> 8))/255.0 \
    blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]

- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
    if (nil == cell) {
        cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:@"cell"] autorelease];
    }
    cell.textColor = UIColorFromRGB(0x333333);
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    cell.text = @"Testing 1 2 3";
}

Labels: iPhone, Objective-C

• Jonathan Zdziarski, iPhone maven and author of "iPhone Open Application Development" (This has me more excited than anything else right now)
  
• John Viega, security guru and author of many O'Reilly titles, including the upcoming "Beautiful Security"
  

• Be no longer than 5 minutes.
• Be on an innovative topic (no sales pitches or launches, please!).
• Be viewable on a PC with standard AV equipment.
  

Labels: BarCampBoston, boston, Flex, iPhone

1. Battery life. Someone needs to make a player that isn't Flashlite, but consumes a lot less CPU to do its rendering - taking advantage of the hardware more. I am sure the iPhone does this on its own already with all the speedy transitions. Give that to the Flash Player, and that would be a big help.
2. Edge sucks, so we'd have to worry a little about the size of most Flash content, how it gets cached and eats memory, and how it would perform on a slow connection (something most of us have simply forgotten about). A caching mechanism or something could possibly help.
3. The iPhone gesturing might get confused with Flash content underneath it that also sucks up mouse events? Probably not, but maybe. Depending on how the Flash was developed, it could make things weird, especially for full-screen Flash apps and websites. This is probably the easiest thing to fix.

Labels: Flash, iPhone