Crossing the Finish Line

This was a big chapter. Conceptually, we didn't hit you with too much new stuff, but we took you through the use of a good number of controls and showed you many different implementation details. You got a lot more practice with outlets and actions, and saw how to use the hierarchical nature of views to your advantage. You learned about control states and stretchable images, and you also learned how to use both action sheets and alerts.

There's a lot going on in this little application. Feel free to go back and play with it. Change values, experiment by adding and modifying code, and see what different settings in Interface Builder do. There's no way we could take you through every permutation of every control available in iOS, but the application you just put together is a good starting point and covers a lot of the basics.