Notes of a Developer » iPhone 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 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 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 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 Enable Emoji on iPhone OS 4.0 without jailbreak http://www.developers-life.com/enable-emoji-on-iphone-os-4-0-without-jailbreak.html http://www.developers-life.com/enable-emoji-on-iphone-os-4-0-without-jailbreak.html#comments Tue, 25 May 2010 16:32:48 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=968 1. Set up app Water Lou

2. Enter the secret code is 91929394.59

3. reboot

4. go to settings->general->keyboard->add keyboard

For displaing emoji icons in firefox you can use Grease Monkey.

Thanks waterworld.com.hk!

Replacing Emoji...
Replacing Emoji...
Replacing Emoji...
]]> http://www.developers-life.com/enable-emoji-on-iphone-os-4-0-without-jailbreak.html/feed 0 В свободное время http://www.developers-life.com/free-time-for-vkontakter.html http://www.developers-life.com/free-time-for-vkontakter.html#comments Sun, 02 May 2010 14:22:12 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=956 Vkontakter

В свободное время решил поработать немного над созданием простого клиента для социальной сети “Вконтакте”. Хочу поделиться маленьким результатом. Это пока скромная версия, которая может вывести список, отправить сообщение, изменить статус и еще несколько мелочей…

Я не руководился тем нужно это или нет, просто было интересно поработать с новым API от “Вконтакте”.

Спасибо за внимания, если получится что-то хорошее, то возможно появится и для общего пользования.

P.S.: Хочу заметить, что этот проект больше для повышения опыта разработки и не поддается критике :)

]]> http://www.developers-life.com/free-time-for-vkontakter.html/feed 0 Simple XML Parser based on NSXMLParser +converter http://www.developers-life.com/simple-xml-parser-based-on-nsxmlparser-converter.html http://www.developers-life.com/simple-xml-parser-based-on-nsxmlparser-converter.html#comments Wed, 21 Apr 2010 11:45:16 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=944 Simple XML Parser based on NSXMLParser +converter to XML file

How To Setup:
insert next code to file “name of you project”_Prefix.pch

  1. #import "XMLNode.h"
  2.     #import "XMLParser.h"
  3.     #import "XMLConvert.h"

Create and launching XMLParser.
You will get parsed data ( with XMLNode data type ) in callbackParser: method

  1. NSURL *URLToFile = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"source" ofType:@"xml"]];
  2.    
  3.     XMLParser *parser = [[XMLParser alloc] init];
  4.     [parser setDelegate:self withAction:@selector(callbackParser:)];
  5.     [parser parseXMLFile:URLToFile];
  6.     [parser release];

Converting results of parsing to XML file:

  1. NSString *content = [XMLConvert convertXMLNode:root];

And additional define methods for working with XMLNode’s:
XMLaddAttribute(node, object, key), XMLgetAttribute(node, key), XMLsetParent(node, parent), XMLaddChild(parent, child), XMLgetChild(parent, child), XMLremoveChild(parent, child), XMLgetChildWithAttribute(parent, childname, object, key)

Source
Good luck!

]]> http://www.developers-life.com/simple-xml-parser-based-on-nsxmlparser-converter.html/feed 0 Screenshots of new iPhone OS 4.0 beta http://www.developers-life.com/screenshots-of-new-iphone-os-4-0-beta.html http://www.developers-life.com/screenshots-of-new-iphone-os-4-0-beta.html#comments Fri, 09 Apr 2010 19:22:15 +0000 Vladimir Boychentsov http://www.developers-life.com/?p=933 Home screen, more beautiful with background and folders!

Multitasking! :) It’s amazing!

My “Internet” folder for online application

My folder for games

Cube slide show animation in default Photos application

Zoom in/Out in default Camera application

Selecting many photos for sharing :)

Sharing photo with original size or small!

Spelling in default Mail application, and new style of main screen app

Counting symbols

Activity icon for applications with using your geo location

]]> http://www.developers-life.com/screenshots-of-new-iphone-os-4-0-beta.html/feed 0