In This Chapter
• Navigation bars and controllers
• Application delegates
• Adding buttons and changing titles on the navigation bar
• Passing data to a new view controller
• CelebriTweets app
When Apple was developing the original iPhone interface, they had several teams working on the built-in applications. One team worked on Mail and Calendar. Another worked on the Phone and SMS apps. Other teams worked on the iPod, Clock, Maps, Settings, and Notes apps. And all of these apps had to solve the same problem: hierarchical navigation. How do you get around in the application? How do you know where you are? There was no iPhone SDK at the time, so each of these groups came up with their own solutions. As ...