Re: Document Based Application
Re: Document Based Application
- Subject: Re: Document Based Application
- From: Graham Cox <email@hidden>
- Date: Sun, 08 Jul 2012 11:07:55 +1000
On 08/07/2012, at 8:41 AM, koko wrote:
> My Document Based Application is to have n document types.
>
> Is it then proper to create n subclasses of NSDocument and the corresponding plist Document types entries, i.e. Item 0 thru Item n-1 ?
You can do it that way, or you can let a NSDocument subclass handle multiple types if they are quite similar, or a bit of both. i.e. it depends. In my app I have one document subclass for a number of filetypes, because they all end up as the same document type with the same internal data model.
> Is it true that all n document types will have a common extension but will be identified by the Document types entires?
If they all have the same extension then the system can't distinguish when a file is opened by your app what document object class it should instantiate, so that won't work.
--Graham
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