[How-to] Create a Delegate for iphone (in a separate file)

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[How-to] Create a Delegate for iphone (in a separate file)

Hey guys,

I have been looking for hours and didn't find anything so I decided to give up and ask for your precious knowledge ;)

In order to make my code cleaner, I would like to implement the delegate methods of NSXMLParser in another file ... but I couldn't find any tutorials ...

Could someone explain me briefly how to do that ?

Cheers mates,

Gauthier.

+1 A:

Create a Class that implements the methods you want your parser to respond to, then set the delegate of your NSXMLParser instance to an instance of your new Class.

Rob Jones 2010-02-17 22:09:51

As my delegate instance will not be retained by my parser, where am i supposed to release it ? In dealloc ? Thanks for the help ;)

gotye 2010-02-17 22:43:09

One more question : what type is supposed to be my delegate class ?nsobject ?!? Or what ?Cheers

gotye 2010-02-17 22:45:34

Make the delegate class inherit from NSObject.

Rob Jones 2010-02-17 22:52:26

It's hard to say where you should release your delegate instance. That depends on your code and a lot of things that are not easily answered in comments. I suggest reading up on iPhone memory management. But yeah, dealloc() is an option, but not necessarily the right option.

Rob Jones 2010-02-17 22:54:21

Ok, i think i got it ;) last thing i was thinking about is whether it was better to create a subclass of nsxmlparser (and set self as delegate) or to create a delegate ... Thanks a lot for your time !

gotye 2010-02-18 07:58:12

I think I can argue either way; depends on what you're doing. If your delegate implements methods that would be useful in other instances of NSXMLParser, than it make sense to use a distinct delegate. But, if you're just doing this once, and can never conceive of reusing these methods, then subclassing NSXMLParser would be just fine. I would lean towards a separate delegate object since it's more flexible.

Rob Jones 2010-02-18 15:28:54

Well, thanks A LOT for all these information ;) !

gotye 2010-02-18 18:24:03

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[How-to] Create a Delegate for iphone (in a separate file)

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