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iPhone and iPad development
Tips, Libs and more about iPhone and iPad development and ios
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Mac QuartzGL (2D drawing on the graphics card) performance

Mac QuartzGL (2D drawing on the graphics card) performance | iPhone and iPad development | Scoop.it
A graphics card can render 3D graphics hundreds of times faster than a CPU and graphics cards are used to accelerate compositing of windows on the desktop for a many-fold performance increase.

Despite the advantages of graphics cards in these areas, 2D geometry on the Mac is normally generated by the CPU in main memory. You can opt to have your program drawn on the graphics card instead but this option is off by default. This 2D on the graphics card drawing is named QuartzGL.

QuartzGL works by generating an an OpenGL ARB_fragment_program (pixel buffer drawing commands) and performing on the graphics card what would ordinarily be performed on the CPU.
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Using Git Versioning inside your XCode Project

Using Git Versioning inside your XCode Project | iPhone and iPad development | Scoop.it
This tutorial will show you how to automatically fill in CFBundleVersion and CFBundleShortVersionString, when using Git.
This has been tested in Xcode 3.2.5
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Open AppStore reviews for an iPhone app

Open AppStore reviews for an iPhone app | iPhone and iPad development | Scoop.it
Code snippet: Open AppStore reviews for an iPhone app — http://bit.ly/hJVZkO
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AppDevMag » 10 iOS Libraries to Make Your Life Easier

AppDevMag » 10 iOS Libraries to Make Your Life Easier | iPhone and iPad development | Scoop.it
The operating system that powers Apple’s iPhone and iPad devices, iOS, has proved incredibly popular with developers. A large part of this is almost certainly due to the opportunity that the App Store gives developers to make money, but the great development tools that Apple provide, in the form of XCode and Interface Builder, and also the Objective-C programming language, which iOS developers are required to use, certainly play their part.
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cocos2d Xcode 4 templates | cocos2d for iPhone

cocos2d Xcode 4 templates | cocos2d for iPhone | iPhone and iPad development | Scoop.it
cocos2d for iPhone Xcode 4 templates can be downloaded from here: cocos2d-1.0.0-beta_templates.tar.gz IMPORTANT: As you might know, Xcode 4 has a new (Nice ;) RT @cocos2d: cocos2d + box2d + chipmunk Xcode 4 templates: http://bit.ly/fEgsUq)
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Code Formatting in Xcode 4 | Carbon Five Community

Code Formatting in Xcode 4 | Carbon Five Community | iPhone and iPad development | Scoop.it
Quickly reformat your code in Xcode 4 RT @CocoaSamurai: 2 easy ways to run uncrustify http://goo.gl/ltVak via @xctotd
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Storyboarding iPad Transitions - Boxes and Arrows: The design behind the design

Storyboarding iPad Transitions - Boxes and Arrows: The design behind the design | iPhone and iPad development | Scoop.it
If your clients are not yet asking you to design transitions, they will likely do that on your next project. Transitions are hot, and not just because they entertain the eye. In confined mobile computing interfaces, on tablet devices or in complex virtual environments, transitions are an authentic, minimalist way of enabling way-finding, displaying system state and exposing crucial functionality – in short, they are key in creating a superior user experience.
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Custom UI Component Database for iOS and Mac OS X - Cocoa Controls

Custom UI Component Database for iOS and Mac OS X - Cocoa Controls | iPhone and iPad development | Scoop.it
All the best Cocoa controls for iOS and Mac OS X (A must see!! @cocoacontrols a custom UI component database for iOS & Mac OS X — http://bit.ly/hSzRX3 (via @jeffhodnett))
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Resize Multi-line Text to Fit UILabel on iPhone « 11 Pixel Studios

Resize Multi-line Text to Fit UILabel on iPhone — http://bit.ly/f9lcr8
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iOS Documentation in Xcode 4?

Firstly, go into Help | Documentation and API Reference, if you click on the eye button on the left-hand side of the documentation window, do you see either the iOS 4.2 Library and/or the iOS 4.3 Library?

If you don't, go into XCode | Preferences, under the Documentation tab, see if you have GET buttons next to the iOS Libraries. If you do, click them and they will download.

via http://romainbriche.com/
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A Couple CGAffineTransform Goodies

A Couple CGAffineTransform Goodies | iPhone and iPad development | Scoop.it
Thanks to Core Animation, we iOS programmers tend to use affine transformations (by way of CGAffineTransform) a lot.
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Cocoa with Love: A ZoomingViewController to animate a UIView to fullscreen

Cocoa with Love: A ZoomingViewController to animate a UIView to fullscreen | iPhone and iPad development | Scoop.it
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Working with UIGestureRecognizers | iPhone Programming Tutorials

Working with UIGestureRecognizers | iPhone Programming Tutorials | iPhone and iPad development | Scoop.it
Hey iCoders! Today we are going to make a fun project that takes advantage of UIGestureRecognizers which were introduced in iOS 3.0, way back when it was called iPhone OS. UIGestureRecognizer is an abstract class that several concrete classes extend Eg. UITapGestureRecognizer, UIPinchGestureRecognizer. Today we are going to be building a simple photo board application. You will be able to add photos from your board, move, rotate and zoom them in and out around the board. We will also build in some simple physics to give a sense of the photos being thrown around the board. Here is a short video of what our final product will look like.
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Thoughts on Apple’s iPad 2 Event

The iPad 2 introduced today brought few surprises. The obvious new hardware was there (camera) and obviously unrealistic rumors were confirmed to be false (e.g. retina screen).
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How to use Open Flow to create a menu.

How to use Open Flow to create a menu. | iPhone and iPad development | Scoop.it
Open flow gives your app a cover flow like effect and we will use this to create a menu.
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What’s New in iOS 4.3

What’s New in iOS 4.3 | iPhone and iPad development | Scoop.it
With every iOS release Apple adds quite a few new features into it’s existing devices. So what iOS 4.3 is bringing down to the table?
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Selling Content on the App Store – The New Rules

First of all, kudos to Apple for updating the guidelines. The paragraphs you should look at for this discussion are 11.12 – 11.14. Based on my reading (and keep in mind that I’m an iOS developer, not a lawyer) these are your options:

1. Use IAP only for selling content

2. Use a combination of IAP and your own ecommerce

3. Only rely on your ecommerce website
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iOS custom OpenGL transitions

Few days ago I found nice class which handles custom OpenGL UIView transitions http://memention.com/blog/2010/02/28/Bells-and-Whistles.html I would probably stick to it and use it, but unfortunately I didn't like the lag before the animation starts and few details (not working on all orientations ...). So I decided to rewrite it from scratch, make it as fast as possible, and maybe a little bit easier (if possible) to use.

I ended up with HMGLTransitions which you can download from here http://github.com/Split82/HMGLTransitions The biggest difference between this and previously mentioned implementations is that I use singleton object which creates OpenGL context only once. This can drastically improve starting lag of animation. Also I don't resample textures and use exact size. Next "big" thing is that all device orientations are supported. Now everything works nice and smooth (except cloth animation on iPhone 3G and lower ;) There are still some things which should be added and there is also space for some performance enhancements, but for now it's enough and can be used without having any problems on iPhone. On iPad there might be performance issues (starting lag) if the view hierarchy which needs to be rendered to the texture is too complicated.
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How To Choose The Best XML Parser for Your iPhone Project | Ray Wenderlich

How To Choose The Best XML Parser for Your iPhone Project | Ray Wenderlich | iPhone and iPad development | Scoop.it
There are a lot of options when it comes to parsing XML on the iPhone. The iPhone SDK comes with two different libraries to choose from, and there are several popular third party libraries available such as TBXML, TouchXML, KissXML, TinyXML, and GDataXML. How is a developer to choose?
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Show a custom popover view within your iPad App | Seaside

Show a custom popover view within your iPad App | Seaside | iPhone and iPad development | Scoop.it
The possibility to show popover views (modal or non modal) is a really cool thing within the new iPhone OS 3.2. It allows you to display important information,
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Curated by Vincent Demay
Development Manager @ Scoop.it - http://www.scoop.it
iPad, iPhone and Android developer
Geek :)