Page: Create white alpha PNG
PNG alpha issue with UIBaButtonItem used in Navigation Bar http://stackoverflow.com/questions/3431961/uibarbuttonitem-icon-white-when-added-via-ib-black-when-added-programmatically http://stackoverflow.com/questions/4324764/iphone-uibarbuttonitem-alpha-of-button-image http://stackoverflow.com/questions/8448320/alpha-mask-extraction-process-objective-c-implementation
Icon sizes https://developer.apple.com/library/ios/#documentation/UserExperience/Conceptual/MobileHIG/IconsImages/IconsImages.html Icon sets http://owltastic.com/2011/08/simple-interface-design-icons/ http://stackoverflow.com/questions/5140117/where-can-i-buy-iphone-icon-sets http://pictos.cc/three/ UI reference examples: http://nathanmanousos.com/ui_reference/
trevor harmon with ios 5 fixes https://gist.github.com/2009030
Image from UIVIew, and scale factor for retina. http://www.icab.de/blog/2010/10/01/scaling-images-and-creating-thumbnails-from-uiviews/
WebKit limit on Retina JPG image display: http://news.ycombinator.com/item?id=3739317
Decode UIImage in background https://gist.github.com/2002207
A UIImage category that will replace or remove colors. This allows multiple colors to be changed on a single image, until it has alpha values. https://gist.github.com/1292152
Search Github:gist https://gist.github.com/gists/search?utf8=%E2%9C%93&q=UIImage&page=1
Rotations, grayscale conversion, skew detection of text images http://code.google.com/p/uiimage-operations/source/browse/trunk/source/UIImage%2BOperations.h
ios3 + cgimage extra for trevor's code https://smallduck.wordpress.com/2010/01/14/improvement-to-uiimageplusresize-m/
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