Notes of a Developer » Mac OS X

Uninstall/Resetting Xcode

Vladimir Boychentsov — Sun, 05 Sep 2010 16:29:15 +0000

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

Good book!

Vladimir Boychentsov — Tue, 08 Jun 2010 21:04:05 +0000

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

Программа для создания панорам из нескольких снимков

Vladimir Boychentsov — Tue, 01 Jun 2010 17:49:51 +0000

Удобная, простая, функциональная, и абсолютно бесплатная программа для создания панорамных фото

Make gradient on iPhone/iPad

Vladimir Boychentsov — Sun, 30 May 2010 18:57:09 +0000

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

#import < QuartzCore/QuartzCore.h>

so, example:

UIView *myTabView = [[UIView alloc] initWithFrame:frame];
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = myTabView.bounds;
gradient.colors = [NSArray arrayWithObjects:
(id)[[UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:0.8 ] CGColor]
, (id)[[UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:0.8 ] CGColor]
, (id)[[UIColor colorWithRed:0.1 green:0.1 blue:0.1 alpha:0.8 ] CGColor]
, (id)[[UIColor blackColor] CGColor]
, (id)[[UIColor blackColor] CGColor], nil];
[myTabView.layer insertSublayer:gradient atIndex:0];
[[self.tabBarController tabBar] insertSubview:myTabView atIndex:0];
[myTabView release];

Result:

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

- (void)drawRect:(CGRect)rect
{
CGContextRef currentContext = UIGraphicsGetCurrentContext();
CGGradientRef glossGradient;
CGColorSpaceRef rgbColorspace;
size_t num_locations = 2;
CGFloat locations[2] = { 0.0, 1.0 };
CGFloat components[8] = { 1.0, 1.0, 1.0, 0.35, // Start color
1.0, 1.0, 1.0, 0.06 }; // End color
rgbColorspace = CGColorSpaceCreateDeviceRGB();
glossGradient = CGGradientCreateWithColorComponents(rgbColorspace, components, locations, num_locations);
CGRect currentBounds = self.bounds;
CGPoint topCenter = CGPointMake(CGRectGetMidX(currentBounds), 0.0f);
CGPoint midCenter = CGPointMake(CGRectGetMidX(currentBounds), CGRectGetMidY(currentBounds));
CGContextDrawLinearGradient(currentContext, glossGradient, topCenter, midCenter, 0);
CGGradientRelease(glossGradient);
CGColorSpaceRelease(rgbColorspace);
}

Many documentations

resource

First video Vkontakter, mac os x client for vkontakte.ru

Vladimir Boychentsov — Sat, 22 May 2010 12:59:09 +0000

Небольшая демонстрация программы написанной мною в свободное время. Программа на данный момент не очень функциональная, но все впереди! :)

Tutorial: Drag and drop (Dad) a line, image inside an NSTableView

Vladimir Boychentsov — Sat, 22 May 2010 12:15:25 +0000

Video Tutorial working with NSTableView

Part 1

Download Video part 1

Part 2

Download Video part 2

Source

В свободное время

Vladimir Boychentsov — Sun, 02 May 2010 14:22:12 +0000

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 :)

Simple XML Parser based on NSXMLParser +converter

Vladimir Boychentsov — Wed, 21 Apr 2010 11:45:16 +0000

Simple XML Parser based on NSXMLParser +converter to XML file

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

#import "XMLNode.h"
#import "XMLParser.h"
#import "XMLConvert.h"

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

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

Converting results of parsing to XML file:

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!

Streatch image with stretchableImageWithLeftCapWidth: topCapHeight:

Vladimir Boychentsov — Wed, 10 Mar 2010 14:43:38 +0000

Sample

+ (UIImage*)greenBubble
{
if (sGreenBubble == nil) {
UIImage *i = [UIImage imageNamed:@"Balloon_1.png"];
sGreenBubble = [[i stretchableImageWithLeftCapWidth:15 topCapHeight:13] retain];
}
return sGreenBubble;
}
+ (UIImage*)grayBubble
{
if (sGrayBubble == nil) {
UIImage *i = [UIImage imageNamed:@"Balloon_2.png"];
sGrayBubble = [[i stretchableImageWithLeftCapWidth:21 topCapHeight:13] retain];
}
return sGrayBubble;
}

Results:

or

испоьзовал 2 картинки

Tutorial: Drag and Drop file on NSImageView

Vladimir Boychentsov — Fri, 26 Feb 2010 19:44:07 +0000

Step by step for starter developers…

1. Create a project in xCode with name “DragAndDrop” or any else…2. Add an element “NSImageView” on main view in the MainMenu.xib

3. Add files NSCImageView.m/NSCImageView.h to project with subclass of UIView

4. Replace “NSImageView” name class on “NSCImageView” in the NSImageView objec

5. Change subclass “NSView” to “NSImageView”

6. Remove all methods from *.m file

7. Methods for getting entering and exit of dragging

8. Method for checking information of dragging result

Source of NSCImageView.m

Note: If you make drag and drop with NSView and any other object, you will need add this code:

[self registerForDraggedTypes:[NSArray arrayWithObjects:NSTIFFPboardType,
NSFilenamesPboardType, nil]];

Result: