2010/09/112011/01/08 iPhone icon size / iPhone 人機介面建議守則 URL : http://developer.apple.com/library/ios/#documentation/userexperience/conceptual/mobilehig/IconsImages/IconsImages.html steps by steps : http://www.cutelittlefactory.com/tutorials/how-to-create-an-iphone-icon-full-workflow/ utils: http://www.midnightmobility.com/iphone-icon/