Various Objective-C categories and additions that have served me well over the years. Hopefully then can serve you too!

Licence

Released under the Modified BSD License. (Attribution Required)

RHAdditions

Copyright (c) 2011-2013 Richard Heard. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
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3. The name of the author may not be used to endorse or promote products
derived from this software without specific prior written permission.

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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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Content Overview

RHARCSupport

Supporting macros to allow for building both with and without ARC enabled.

RHLoggingSupport

Provides debug and error logging macros.

NSArray+RHFirstObjectAdditions

Adds a firstObject method for balance.

NSBundle+RHLaunchAtLoginAdditions

Adds support for Launch At Login via SMLoginItemSetEnabled().

NSImage+RHImageRepresentationAdditions

Adds various (PNG / JPEG / GIF) representations.

NSObject+RHClassInfoAdditions

Adds a logClassInfo method to dump a classes ivars, properties and methods.

NSString+RHNumberAdditions

Adds a bunch of number methods to better reflect those available on NSNumber.

NSString+RHRot13Additions

Adds a rot13 method for various "non security related" purposes.

NSString+RHURLEncodingAdditions

Adds URL encoding methods.

NSThread+RHBlockAdditions

Adds methods for running blocks on specific threads. Useful when specific tasks need to be performed on a specific thread etc.

NSView+RHSnapshotAdditions

Provides NSView snapshotting, useful for animations and cover transitions.

UIView+RHSnapshotAdditions

Provides UIView snapshotting, useful for animations and cover transitions.

NSWindow+RHResizeAdditions

Adds a method to allow for resizing of a windows contentSize over a specific duration.

UIApplication+RHStatusBarBoundsAdditions

Adds statusBar width, height and bounds methods.

UIColor+RHInterpolationAdditions

Provides interpolation between 2 UIColors, useful for frame animations etc.

UIDevice+RHDeviceIdentifierAdditions

Provides a mac address / sha1 based set of device identifiers.

UIImage+RHComparingAdditions

Adds pixel level image comparison, supports various thresholds for slight variations in images (eg from colour correction etc.) Also supports resizing one of the 2 images being compared if they are not the same size, so that a px by px comparison is possible.

UIImage+RHPixelAdditions

Adds support for accessing the underlying raw pixel data of a UIImage, both in bulk and on a point by point basis. Returned format is RGBA pre-multiplied as is supported by CoreGraphics.

UIImage+RHResizingAdditions

Adds support for resizing of UIImages that are backed by a CGImage, preserves rotation metadata and scale.

UILabel+RHSizeAdditions

Adds some simple widthForHeight: etc. methods.

UIView+RHCompletedActionBadgeAdditions

Adds support for showing a completed action badge from a given view. eg: Upon tapping a submit button and getting a conformation from the server you could show a green checkmark over the submit buttons view.