Re: string convertion: converting getter name to setter
Re: string convertion: converting getter name to setter
- Subject: Re: string convertion: converting getter name to setter
- From: Phil <email@hidden>
- Date: Fri, 5 Sep 2008 13:34:23 +1200
On Fri, Sep 5, 2008 at 12:40 PM, steph thirion <email@hidden> wrote:
>
> from the selector of a given getter function, I need to get the selector of
> the equivalent setter function. For instance, from color I should get
> setColor.
>
I assume you want to do more with the selector than just invoke
it---otherwise you can just use KVC and save yourself some grief.
There are a few cases you may encounter here:
1. There is no setter.
2. There is a setter and the class is KVC compliant for the key.
3. There is a setter and the class isn't KVC compliant for the key,
but there is a setter defined as part of a property definition.
4. (3) but without the property definition.
> char* getterName = sel_getName(getterSelector);
>
Instead of using C strings, you can use NSStrings and
NSSelectorFromString() and NSStringFromSelector()---making string
manipulation much easier. However, for case (3), you'll need to do
some parsing of the property attribute list from
property_getAttributes().
> What would be the less costly way, performance wise, to convert the C string
> "color" to "setColor"?
>
> I have no experience in working with strings in objc, and was hoping someone
> would point me in the right direction before I start.
If you're working in Cocoa (and I assume you are, since this is a
cocoa-dev list), this is a good starting point:
<http://developer.apple.com/documentation/Cocoa/Conceptual/Strings/>
Phil
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