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Official Forum for Programming in Objective-C (the iPhone Programming Language) - Stephen Kochan
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Chapter 11 - Categories and Protocols
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Informal protocols and exercise 3
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Topic: Informal protocols and exercise 3 (Read 2119 times)
MarkReid
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Posts: 173
Informal protocols and exercise 3
«
on:
October 13, 2009, 09:31:48 AM »
I'm just working through exercise 3 and have a couple questions regarding informal protocols.
Since I'm not using all the methods do I need to include them all in my @interface section or just the ones I want to use? If I were to use all the methods in a subclass of Fraction would I need to list them all in that instance or list them as I am here in the subclasses @interface section only without needing to define them in Fraction previously?
Thanks
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Last Edit: October 13, 2009, 10:06:18 AM by MarkReid
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MarkReid
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Posts: 173
Re: Informal protocols and exercise 3
«
Reply #1 on:
October 16, 2009, 05:11:21 AM »
I made it through this section in the end but would still appreciate an answer if anyone has one?
Cheers
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skochan
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Posts: 3114
Re: Informal protocols and exercise 3
«
Reply #2 on:
October 19, 2009, 11:04:03 AM »
Mark,
You can just list the methods you intend to implement. Since it's a category, you don't need to implement all the ones you list either. If you don't you'll just get a warning message from the compiler.
Cheers,
Steve Kochan
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