CarDetailViewController, every time the car is changed, all the data is saved, even if it does not change. Update the controller to save data only when the data has changed.
CarDetailViewController, entering the fuel is easy, but reading it is not. Add a label that shows the fuel and changes when the picker changes. Make sure the fuel area is visually grouped.
3. Add a new top-level menu item called Almost Blank that brings up a view controller with a label that says “This view intentionally left blank (except for this text).”
4. Practice setting an image for a car. This challenge requires the artwork in the
CH11 Assets Big Placeholder folder from the sample code for this chapter. The basic steps to do this are as follows: ...