http://blancer.com/tutorials/i-phone/58725/asset-libraries-and-blocks-in-ios-4/

http://blancer.com/tutorials/i-phone/58725/asset-libraries-and-blocks-in-ios-4/

http://www.cocoachina.com/bbs/read.php?tid=64878&keyword=photo

http://www.icodeblog.com/2010/10/07/cloning-uiimagepickercontroller-using-the-assets-library-framework/