Derived properties
Derived properties
- Subject: Derived properties
- From: Christian Ziegler <email@hidden>
- Date: Wed, 11 Nov 2009 20:52:44 +0100
Hi all,
frankly my question is not really cocoa related, it is more regarding objective-c coding style, but still I'd like to hear the opinion of some professionals.
In order to reuse code I find it often very handy to write little "getters" which don't get their return value from an ivar but compute it somehow. I believe this is called derived property since it derives its value from other properties. My question is, what is the best style implementing such derived properties. With dot-notation in mind, I think the options are:
1. Only write the "getter"-method, no property, no sythesize, DON'T use dot-notation
2. Only write the "getter"-method, no property, no sythesize, DO use dot-notation
3. Write "getter"-method, write property (readonly, to justify dot-notation), sythesize
A basic question here is, for any method which might as well be a property and of course doesn't have any parameters, is it ok to use dot-notation or should'nt you do that.
Simple example:
- (BOOL)itemsSelected {
return [myTableView selectedRow] != -1;
}
Regards,
Chris
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