Re: Indexed Accessors for arrays
Re: Indexed Accessors for arrays
- Subject: Re: Indexed Accessors for arrays
- From: Ricky Sharp <email@hidden>
- Date: Thu, 25 Nov 2004 11:47:47 -0600
On Nov 25, 2004, at 11:30 AM, Dustin Voss wrote:
On 25 Nov, 2004, at 7:51 AM, Ricky Sharp wrote:
I'm ensuring my objects are KVC compliant. Thanks to Kevin
Callahan's Accessorizer, this is going very smoothly.
However, I'm trying to figure out what to do with the following iVar:
NSString* imageNames [IIButtonImageCount];
where IIButtonImageCount is a constant (currently 6). This
fixed-sized array stores the names of the images to use for all
states I allow for my buttons. If a particular value is nil, that
signals that the particular state doesn't have an image in which case
it reverts to using some other state. For example, not all my
buttons will have "mouseover" images.
But isn't it a case where I cannot create indexed accessors for
imageNames as it isn't one of the collection classes (e.g. NSArray)?
Sure you can. The actual data structure doesn't matter, what matters
is that there is a defined set of methods the system can call. In this
case, you simply have to implement -countOfImageNames and
-objectInImageNamesAtIndex:.
And, while I don't currently have ivars like this:
float someAttribute [SomeConstant];
Would that also have to be changed to say an NSArray containing
NSNumbers?
This one is the same thing, just make sure that
-objectInSomeAttributeAtIndex: returns an NSNumber.
You know, I feel a little silly for having asked this :)
I don't know why I was assuming that the implementation had to use a
collection object. You're correct in stating that it's having those
APIs that matters and not how those APIs are implemented.
Thanks,
___________________________________________________________
Ricky A. Sharp mailto:email@hidden
Instant Interactive(tm) http://www.instantinteractive.com
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Cocoa-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden