December 2013
Beginner
576 pages
16h 4m
English
Content preview from Programming in Objective-C, Sixth Edition
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Exercises
1. Implement a copy method for the AddressBook class according to the NSCopying protocol. Would it make sense to also implement a mutableCopy method? Why or why not? Also, think about what happens if someone uses the setter method for the book property in the AddressBook class. Who should own the address book that gets passed as the argument to the setter? How can you fix this?
2. Modify the Rectangle and XYPoint classes defined in Chapter 8 to conform to the <NSCopying> protocol. Add a copyWithZone: method to both classes. Make sure that the Rectangle copies its XYPoint member origin using the XYPoint’s copy method. Does it make sense to implement both mutable and immutable copies for these classes? Explain.
3. Create an NSDictionary ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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