Notes of a Developer » Apple http://www.developers-life.com Develop on Objective-C, UIKit, C, OpenGL for iPhone, iPad, Mac OS X Sun, 05 Sep 2010 16:29:15 +0000 http://wordpress.org/?v=2.8.4 en hourly 1 Uninstall/Resetting Xcode http://www.developers-life.com/uninstallresetting-xcode.html http://www.developers-life.com/uninstallresetting-xcode.html#comments Sun, 05 Sep 2010 16:29:15 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=1061 defaults delete com.apple.Xcode > rm -rf ~/Library/Application\ Support/Xcode At one point in the process he opted to remove the Xcode developer tools and start the configuration from the beginning. Which leads to the tip: should you ever find the need to [...]]]> To reset Xcode to its factory settings for the logged-in user, run these commands in Terminal:

> defaults delete com.apple.Xcode
> rm -rf ~/Library/Application\ Support/Xcode

At one point in the process he opted to remove the Xcode developer tools and start the configuration from the beginning. Which leads to the tip: should you ever find the need to remove Xcode, run the following from within a terminal window to make it happen:

> sudo /Library/uninstall-devtools –mode=all
is the directory where the tools are installed. For typical installations the full path is /Developer/Library/uninstall-devtools

]]> http://www.developers-life.com/uninstallresetting-xcode.html/feed 0 Local Notification Sample Code (OS 4.0 only) http://www.developers-life.com/local-notification-sample-code-os-4-0-only.html http://www.developers-life.com/local-notification-sample-code-os-4-0-only.html#comments Sun, 13 Jun 2010 21:34:46 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=1051 Resource site

Start a new Window-based Application Project called LocalPush

Add an instance variable bgTask in LocalPushAppDelegate

Download Sample + 2 books “iPhoneMemoryManagementFinalVersion” and “ES 2.0 Programming Guide”

  1. @interface LocalPushAppDelegate : NSObject {
  2.     UIWindow *window;
  3.     UIBackgroundTaskIdentifier bgTask;
  4. }

message from background, iphone OS 4.0

It will fire up a Local Notification to remind you one min before the event which is 2 minutes due from now

  1. //
  2. // LocalPushAppDelegate.m
  3. // LocalPush
  4. //
  5.  
  6. @interface ToDoItem : NSObject {
  7. NSInteger year;
  8. NSInteger month;
  9. NSInteger day;
  10. NSInteger hour;
  11. NSInteger minute;
  12. NSInteger second;
  13. NSString *eventName;
  14. }
  15.  
  16. @property (nonatomic, readwrite) NSInteger year;
  17. @property (nonatomic, readwrite) NSInteger month;
  18. @property (nonatomic, readwrite) NSInteger day;
  19. @property (nonatomic, readwrite) NSInteger hour;
  20. @property (nonatomic, readwrite) NSInteger minute;
  21. @property (nonatomic, readwrite) NSInteger second;
  22. @property (nonatomic, copy) NSString *eventName;
  23.  
  24. @end
  25.  
  26. @implementation ToDoItem
  27. @synthesize year, month, day, hour, minute, second, eventName;
  28. @end
  29.  
  30.  
  31.  
  32.  
  33. #import "LocalPushAppDelegate.h"
  34.  
  35. @implementation LocalPushAppDelegate
  36.  
  37. @synthesize window;
  38.  
  39. #define ToDoItemKey @"EVENTKEY1"
  40. #define MessageTitleKey @"MSGKEY1"
  41.  
  42.  
  43. - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
  44. NSLog(@"application: didFinishLaunchingWithOptions:");
  45. // Override point for customization after application launch
  46.  
  47. UILocalNotification *localNotif = [launchOptions
  48. objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
  49.  
  50. if (localNotif) {
  51. NSString *itemName = [localNotif.userInfo objectForKey:ToDoItemKey];
  52. // [viewController displayItem:itemName]; // custom method
  53. application.applicationIconBadgeNumber = localNotif.applicationIconBadgeNumber-1;
  54. NSLog(@"has localNotif %@",itemName);
  55. }
  56. else {
  57. [[UIApplication sharedApplication] cancelAllLocalNotifications];
  58. NSDate *now = [NSDate date];
  59. NSLog(@"now is %@",now);
  60. NSDate *scheduled = [now dateByAddingTimeInterval:120] ; //get x minute after
  61. NSCalendar *calendar = [NSCalendar currentCalendar];
  62.  
  63. unsigned int unitFlags = NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit|NSHourCalendarUnit|NSMinuteCalendarUnit;
  64. NSDateComponents *comp = [calendar components:unitFlags fromDate:scheduled];
  65.  
  66. NSLog(@"scheduled is %@",scheduled);
  67.  
  68. ToDoItem *todoitem = [[ToDoItem alloc] init];
  69.  
  70. todoitem.day = [comp day];
  71. todoitem.month = [comp month];
  72. todoitem.year = [comp year];
  73. todoitem.hour = [comp hour];
  74. todoitem.minute = [comp minute];
  75. todoitem.eventName = @"Testing Event";
  76.  
  77. [self scheduleNotificationWithItem:todoitem interval:1];
  78. NSLog(@"scheduleNotificationWithItem");
  79. }
  80. [window makeKeyAndVisible];
  81. return YES;
  82. }
  83.  
  84. - (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notif {
  85. NSLog(@"application: didReceiveLocalNotification:");
  86. NSString *itemName = [notif.userInfo objectForKey:ToDoItemKey];
  87. NSString *messageTitle = [notif.userInfo objectForKey:MessageTitleKey];
  88. // [viewController displayItem:itemName]; // custom method
  89. [self _showAlert:itemName withTitle:messageTitle];
  90. NSLog(@"Receive Local Notification while the app is still running...");
  91. NSLog(@"current notification is %@",notif);
  92. application.applicationIconBadgeNumber = notif.applicationIconBadgeNumber-1;
  93.  
  94. }
  95.  
  96. - (void) _showAlert:(NSString*)pushmessage withTitle:(NSString*)title
  97. {
  98.  
  99. UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:title message:pushmessage delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
  100. [alertView show];
  101. if (alertView) {
  102. [alertView release];
  103. }
  104. }
  105.  
  106.  
  107. - (void)scheduleNotificationWithItem:(ToDoItem *)item interval:(int)minutesBefore {
  108. NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];
  109. NSDateComponents *dateComps = [[NSDateComponents alloc] init];
  110. [dateComps setDay:item.day];
  111. [dateComps setMonth:item.month];
  112. [dateComps setYear:item.year];
  113. [dateComps setHour:item.hour];
  114. [dateComps setMinute:item.minute];
  115. NSDate *itemDate = [calendar dateFromComponents:dateComps];
  116. [dateComps release];
  117.  
  118.  
  119. UILocalNotification *localNotif = [[UILocalNotification alloc] init];
  120. if (localNotif == nil)
  121. return;
  122. localNotif.fireDate = [itemDate dateByAddingTimeInterval:-(minutesBefore*60)];
  123. NSLog(@"fireDate is %@",localNotif.fireDate);
  124. localNotif.timeZone = [NSTimeZone defaultTimeZone];
  125.  
  126. localNotif.alertBody = [NSString stringWithFormat:NSLocalizedString(@"%@ in %i minutes.", nil),
  127. item.eventName, minutesBefore];
  128. localNotif.alertAction = NSLocalizedString(@"View Details", nil);
  129.  
  130. localNotif.soundName = UILocalNotificationDefaultSoundName;
  131. localNotif.applicationIconBadgeNumber = 1;
  132. // NSDictionary *infoDict = [NSDictionary dictionaryWithObject:item.eventName forKey:ToDoItemKey];
  133. NSDictionary *infoDict = [NSDictionary dictionaryWithObjectsAndKeys:item.eventName,ToDoItemKey, @"Local Push received while running", MessageTitleKey, nil];
  134. localNotif.userInfo = infoDict;
  135.  
  136. [[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
  137. NSLog(@"scheduledLocalNotifications are %@", [[UIApplication sharedApplication] scheduledLocalNotifications]);
  138. [localNotif release];
  139. }
  140.  
  141. - (NSString *) checkForIncomingChat {
  142. return @"javacom";
  143. };
  144.  
  145. - (void)applicationDidEnterBackground:(UIApplication *)application {
  146. NSLog(@"Application entered background state.");
  147. // UIBackgroundTaskIdentifier bgTask is instance variable
  148. NSAssert(self->bgTask == UIBackgroundTaskInvalid, nil);
  149.  
  150. bgTask = [application beginBackgroundTaskWithExpirationHandler: ^{
  151. dispatch_async(dispatch_get_main_queue(), ^{
  152. [application endBackgroundTask:self->bgTask];
  153. self->bgTask = UIBackgroundTaskInvalid;
  154. });
  155. }];
  156.  
  157. dispatch_async(dispatch_get_main_queue(), ^{
  158. while ([application backgroundTimeRemaining] > 1.0) {
  159. NSString *friend = [self checkForIncomingChat];
  160. if (friend) {
  161. UILocalNotification *localNotif = [[UILocalNotification alloc] init];
  162. if (localNotif) {
  163. localNotif.alertBody = [NSString stringWithFormat:
  164. NSLocalizedString(@"%@ has a message for you.", nil), friend];
  165. localNotif.alertAction = NSLocalizedString(@"Read Msg", nil);
  166. localNotif.soundName = @"alarmsound.caf";
  167. localNotif.applicationIconBadgeNumber = 1;
  168. NSDictionary *infoDict = [NSDictionary dictionaryWithObjectsAndKeys:@"Your Background Task works",ToDoItemKey, @"Message from javacom", MessageTitleKey, nil];
  169. localNotif.userInfo = infoDict;
  170. [application presentLocalNotificationNow:localNotif];
  171. [localNotif release];
  172. friend = nil;
  173. break;
  174. }
  175. }
  176. }
  177. [application endBackgroundTask:self->bgTask];
  178. self->bgTask = UIBackgroundTaskInvalid;
  179. });
  180. }
  181.  
  182.  
  183. - (void)dealloc {
  184. [window release];
  185. [super dealloc];
  186. }
  187. @end
]]> http://www.developers-life.com/local-notification-sample-code-os-4-0-only.html/feed 2 Эксперемент http://www.developers-life.com/an-experiment.html http://www.developers-life.com/an-experiment.html#comments Sun, 13 Jun 2010 18:54:48 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=1045 Написал простенькую программку ради эксперимента. С помощью программы можно ходит по корневому разделу системы, без Jailbreak. Если кто-то имеет опыт как создать фаил в директории не принадлежащей программе,  без взлома устройства, и поделится! Буду очень признателен!

photo

И собственно сам код

]]> http://www.developers-life.com/an-experiment.html/feed 0 UML диаграммы в Xcode http://www.developers-life.com/create-uml-models-in-xcode.html http://www.developers-life.com/create-uml-models-in-xcode.html#comments Sat, 12 Jun 2010 15:03:36 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=1031 На написание данного поста меня с подвигла недавняя задача! Мне нужно было для записки и слайдов дипломного проекта предоставить UML диаграммы. Сначала по гуглил и сразу попал на страницу одной софтины, которая называется MacTranslator, забегая на перед, т.к. многие могут просто не дочитать, НЕ РЕКОМЕНДУЮ ее покапать, хотя вряд ли ее кто и купит из читателей и простых серферов веба, т.к. софтина стоит 465$, если не ошибаюсь :)

Небольшое отступление:
С Xcode средой разработки я знаком уже почти 2 года, и с версиями ниже 3-ей не работал. Многое уже освоил, но занимаюсь изучением возможностей данной среды далее. Считаю, что много интересного я еще не знаю!

Далее я нашел много интересного программного обеспечения, но ни один из продуктов мне не пришелся по вкусу и функционалу, всего 2 продукта поддерживали Objective-C, что весьма печально. В итоге я начал рисовать вручную и когда зашел в Xcode меня осенило, что я зря провел время на поиски! На сегодняшний день Xcode может все сделать за вас! Как давно есть этот функционал я не задавался вопросом, но по моим предположениям и по скриншотам, могу предположить что довольна таки давно, примерно с 2006 года точно! Судя по данному документу!

Немного еще поискав по девелоперской части сайта , наткнулся на Introduction to Xcode Design Tools for Class Modeling

Кратко о том как это делается, на одном из семплов от Apple, к примеру “QuartzDemo”:

1. Добавляем новый фаил “Class Model”
Добавление файла в Xcode для отображения UML из исходного кода Objective-C, UML from Objective-C source code

2. Добавляем в него файлы и нажимаем “Finish”
Create Class Model

3. В итоге мы увидим UML диаграммы, но они будут немного не наглядно выстраены, это легко поправимо, результат:

UML Xcode
UML Xcode

В каждом блоке можно развернуть Properties и Operations! Из каждого элемента можно легко перейти к участку кода!

Рекомендую использовать для наглядности. Очень помогает когда возвращаешся к старому проекту. Плюсов очень много.

Хочу сказать, что все оказалось очень просто и довольна таки красиво, вот к примеру мои UML диаграммы на стадии разработки одного из моих проектов, текст специально мелкий, чтоб не возможно было прочитать :)

]]> http://www.developers-life.com/create-uml-models-in-xcode.html/feed 0 UIImage and Memory http://www.developers-life.com/uiimage-and-memory.html http://www.developers-life.com/uiimage-and-memory.html#comments Thu, 10 Jun 2010 11:43:22 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=1023 +[UIImage imageNamed:]
• Reads the file, uncompresses it, caches result
• Cached copy of data is kept even if the UIImage is deallocated
• Low memory condition causes cache to be purged.
• No direct control over when cache is purged.
• Use for small frequently drawn images.

+[UIImage imageWithContentsOfFile:]
• Just reads enough of file to determine if it can open the file.
• Reads and uncompresses the file each time it draws. Uses uncompressed size worth of memory only temporarily.
• Assigning a UIImage created this way to a UIImageView or as the contents of a CALayer also causes it to read and uncompress the file. The UIImageView or CALayer keep the expanded version.

Memory Usage (in MB) 8.6 MB image used with UIImageView

imageNamed imageWithContentsofFile
Initial 2.46 2.46
Load UIImage 11.12 2.51
Assign to UIImageView 11.09 11.09
Remove from UIImageView 11.12 2.51

Memory Usage (in MB) 8.6 MB image used with UIView subclass (stored in instance variable and drawn with drawinRect: )

imageNamed imageWithContentsofFile
Initial 2.73 2.73
Load UIImage 11.38 2.78
Assign to UIImageView 11.81 3.20
Remove from UIImageView 11.84 3.04

Спасибо за некоторые пояснения Андрею Копаневу :)

И вот этому документу – Robert Clair

]]> http://www.developers-life.com/uiimage-and-memory.html/feed 0 iPhone 3D Samples from “iPhone 3D Programming” book http://www.developers-life.com/iphone-3d-samples.html http://www.developers-life.com/iphone-3d-samples.html#comments Wed, 09 Jun 2010 13:35:34 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=1010 iPhone 3D Samples from “iPhone 3D Programming Developing Graphical Applications with OpenGL ES” book.
Thanks Frank and Doris Rideout and O’REILLY

31 iPhone 3D Samples OpenGL ES 1.1 and 2.0


All links direct to http://examples.oreilly.com/

All Samples

HelloArrow

HelloCone

TouchCone

ModelViewer.SimpleWireframe

ModelViewer.VertexLighting

ModelViewer.PixelLighting

ModelViewer.ToonLighting

ModelViewer.FancyWireframe

ModelViewer.ObjViewer

ModelViewer.Textured

TextureFilters

TextureFormats

CameraTexture

TextureAlpha

Trefoil.Stencil

Trefoil.FakeStencil

Trefoil.Antialiasing

Trefoil.Jitter

AaLines

Holodeck.Clouds

Holodeck.Camera

Klein.Fps

Haiku

DistanceField

SpriteSheet

SpringyStars

Klein.Bumpy

Klein.Cubemap

CrudeBloom

GaussianBloom

VertexSkinning

]]> http://www.developers-life.com/iphone-3d-samples.html/feed 1 Good book! http://www.developers-life.com/good-book.html http://www.developers-life.com/good-book.html#comments Tue, 08 Jun 2010 21:04:05 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=999 Do you have a great idea for a graphics-intensive iPhone or iPad application, but don’t know how to bring it to life? This book offers the perfect solution: a crash course on the OpenGL graphics library with an overview of iPhone 3D development. Whether you’re an experienced OpenGL developer looking to build iPhone apps for the first time, or an iPhone developer wanting to learn sophisticated graphics, iPhone 3D Programming addresses both in one concise, easy-to-use guide.

What does it take to build an iPhone app with stunning 3D graphics? This book will show you how to apply OpenGL graphics programming techniques to any device running the iPhone OS — including the iPad and iPod Touch — with no iPhone development or 3D graphics experience required. iPhone 3D Programming provides clear step-by-step instructions, as well as lots of practical advice, for using the iPhone SDK and OpenGL.

You’ll build several graphics programs — progressing from simple to more complex examples — that focus on lighting, textures, blending, augmented reality, optimization for performance and speed, and much more. All you need to get started is a solid understanding of C++ and a great idea for an app.

* Learn fundamental graphics concepts, including transformation matrices, quaternions, and more
* Get set up for iPhone development with the Xcode environment
* Become familiar with versions 1.1 and 2.0 of the OpenGL ES API, and learn to use vertex buffer objects, lighting, texturing, and shaders
* Use the iPhone’s touch screen, compass, and accelerometer to build interactivity into graphics applications
* Build iPhone graphics applications such as a 3D wireframe viewer, a simple augmented reality application, a spring system simulation, and more

This book received valuable community input through O’Reilly’s Open Feedback Publishing System (OFPS). Learn more at

Buy Book

Free for online read

]]> http://www.developers-life.com/good-book.html/feed 0 купил iPad :) http://www.developers-life.com/%d0%ba%d1%83%d0%bf%d0%b8%d0%bb-ipad.html http://www.developers-life.com/%d0%ba%d1%83%d0%bf%d0%b8%d0%bb-ipad.html#comments Sun, 06 Jun 2010 15:26:14 +0000 Vladimir Boychentsov http://www.developers-life.com/%d0%ba%d1%83%d0%bf%d0%b8%d0%bb-ipad.html Как вы уже поняли речь пойдет про iPad :) Девайс удобный и очень впечетляющий, но все же напоминает большой айпод тач. Огорчает отсутствие камеры. В целом ничего особенного, беру его в руки в основном когда нужно работать или почитать письма и посерфить немного.

На последней фотографии видно как отлично можно использовать устройство для презентаций. Этот пост я писал с iPad, не очень удобно, думаю будет удобнее если подсоединить клавиатуру.

]]> http://www.developers-life.com/%d0%ba%d1%83%d0%bf%d0%b8%d0%bb-ipad.html/feed 0 Программа для создания панорам из нескольких снимков http://www.developers-life.com/%d0%bf%d1%80%d0%be%d0%b3%d1%80%d0%b0%d0%bc%d0%bc%d0%b0-%d0%b4%d0%bb%d1%8f-%d1%81%d0%be%d0%b7%d0%b4%d0%b0%d0%bd%d0%b8%d1%8f-%d0%bf%d0%b0%d0%bd%d0%be%d1%80%d0%b0%d0%bc-%d0%b8%d0%b7-%d0%bd%d0%b5%d1%81.html http://www.developers-life.com/%d0%bf%d1%80%d0%be%d0%b3%d1%80%d0%b0%d0%bc%d0%bc%d0%b0-%d0%b4%d0%bb%d1%8f-%d1%81%d0%be%d0%b7%d0%b4%d0%b0%d0%bd%d0%b8%d1%8f-%d0%bf%d0%b0%d0%bd%d0%be%d1%80%d0%b0%d0%bc-%d0%b8%d0%b7-%d0%bd%d0%b5%d1%81.html#comments Tue, 01 Jun 2010 17:49:51 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=990 Удобная, простая, функциональная, и абсолютно бесплатная программа для создания панорамных фото

]]> http://www.developers-life.com/%d0%bf%d1%80%d0%be%d0%b3%d1%80%d0%b0%d0%bc%d0%bc%d0%b0-%d0%b4%d0%bb%d1%8f-%d1%81%d0%be%d0%b7%d0%b4%d0%b0%d0%bd%d0%b8%d1%8f-%d0%bf%d0%b0%d0%bd%d0%be%d1%80%d0%b0%d0%bc-%d0%b8%d0%b7-%d0%bd%d0%b5%d1%81.html/feed 0 Make gradient on iPhone/iPad http://www.developers-life.com/make-gradient-on-iphoneipad.html http://www.developers-life.com/make-gradient-on-iphoneipad.html#comments Sun, 30 May 2010 18:57:09 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=983 It’s easy! As of iPhone SDK 3.0, custom gradients can be implemented very easily, without subclassing or images, by using the new CAGradientLayer

add framework

  1. #import < QuartzCore/QuartzCore.h>

so, example:



or

  1. UIView *myTabView = [[UIView alloc] initWithFrame:frame];
  2.     CAGradientLayer *gradient = [CAGradientLayer layer];
  3.     gradient.frame = myTabView.bounds;
  4.     gradient.colors = [NSArray arrayWithObjects:
  5.                        (id)[[UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:0.8 ] CGColor]
  6.                        , (id)[[UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:0.8 ] CGColor]
  7.                        , (id)[[UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:0.8 ] CGColor]
  8.                        , (id)[[UIColor blackColor] CGColor]
  9.                        , (id)[[UIColor blackColor] CGColor], nil];
  10.     [myTabView.layer insertSublayer:gradient atIndex:0];
  11.     [[self.tabBarController tabBar] insertSubview:myTabView  atIndex:0];
  12.     [myTabView  release];

Result:

or, nice example with use Core Graphics to draw the gradient

  1. - (void)drawRect:(CGRect)rect
  2. {
  3.     CGContextRef currentContext = UIGraphicsGetCurrentContext();
  4.  
  5.     CGGradientRef glossGradient;
  6.     CGColorSpaceRef rgbColorspace;
  7.     size_t num_locations = 2;
  8.     CGFloat locations[2] = { 0.0, 1.0 };
  9.     CGFloat components[8] = { 1.0, 1.0, 1.0, 0.35,  // Start color
  10.          1.0, 1.0, 1.0, 0.06 }; // End color
  11.  
  12.     rgbColorspace = CGColorSpaceCreateDeviceRGB();
  13.     glossGradient = CGGradientCreateWithColorComponents(rgbColorspace, components, locations, num_locations);
  14.  
  15.     CGRect currentBounds = self.bounds;
  16.     CGPoint topCenter = CGPointMake(CGRectGetMidX(currentBounds), 0.0f);
  17.     CGPoint midCenter = CGPointMake(CGRectGetMidX(currentBounds), CGRectGetMidY(currentBounds));
  18.     CGContextDrawLinearGradient(currentContext, glossGradient, topCenter, midCenter, 0);
  19.  
  20.     CGGradientRelease(glossGradient);
  21.     CGColorSpaceRelease(rgbColorspace);
  22. }

Many documentations


resource

]]> http://www.developers-life.com/make-gradient-on-iphoneipad.html/feed 0