Learning iOS Development: A Hands-on Guide to the Fundamentals of iOS Programming

Step 4: Updating MainMenuViewController

This class only uses the protocol for going to the next or previous car, so there are two simple updates:

1. In the .h file, remove the two uses of ViewCarProtocol.

2. In the .m file, tableView:didSelectRowAtIndexPath: has a small change. In the switch case for kPadMenuCarsItem, replace the line:

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currentCarDetailController.delegate = carTable;

with this:

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currentCarDetailController.nextOrPreviousCar = ^(BOOL isNext)                             {[carTable nextOrPreviousCar:isNext];};

This change uses blocks copying in scope variables to include carTable, a reference to the master cars table menu. Since carTable implements nextOrPreviousCar:, and ...