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Useful Objective-C stuff

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# Atomic Tools

A collection of useful Objective-C code and other items of use to iOS and Mac OS X developers. Most of this has been blogged about at [Cocoa is my Girlfriend](http://www.cimgf.com/).

* `NSObject+setValuesForKeysWithJSONDictionary.h`: Safer alternative to `setValuesForKeysWithDictionary:` for use when importing JSON. Works with any object with declared properties corresponding to JSON dictionary keys. Detailed discussion is at [CIMGF](http://www.cimgf.com/2012/01/11/handling-incoming-json-redux/).

* `NSObject+deallocBlock.h`: Add a block to any object that will execute when that object is deallocated. Described in detail at [CIMGF](http://www.cimgf.com/2012/02/17/extending-nsdata-and-not-overriding-dealloc/).

* `NSData+reallyMapped.h`: Create an NSData object using a memory mapped file. Works even though `dataWithContentsOfMappedFile:` is deprecated in iOS 5.0 and `NSDataReadingMappedAlways` doesn't always (despite the name) create memory mapped instances. Described in detail at [CIMGF](http://www.cimgf.com/2012/02/17/extending-nsdata-and-not-overriding-dealloc/).

* `fixpng.sh`: Two bash functions useful for converting iOS-optimized PNGs back into standard PNGs. These functions rely on the `xcrun` command-line tool and probably require that Xcode 4.3 or higher be installed. Based on Daniel Jalkut's [zsh version](https://gist.github.com/2854083).

# Important note

All Objective-C code in this repository is designed for use with automated reference counting (ARC). If you are not using ARC you may experience memory leaks or worse.

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