Objective-Cを学ぶための無料の Tutorial や Document と 有料の本英語 Apple公式 iOS Dev Center - Apple Developer http://developer.apple.com/devcenter/ios/index.action iOS Developer Library http://developer.apple.com/library/ios/navigation/ Stanford大学講義 iPhone Application Development (Winter 2010) - Download free content from Stanford on iTunes http://itunes.apple.com/us/itunes-u/iphone-application-development/id384233225 Downloads (2010-2011 Fall) | CS 193P iPhone
