Re: importing MyDocument.h compiler errors and warnings
Re: importing MyDocument.h compiler errors and warnings
- Subject: Re: importing MyDocument.h compiler errors and warnings
- From: Mike Abdullah <email@hidden>
- Date: Wed, 18 Oct 2006 08:31:54 +0100
On 17 Oct 2006, at 22:52, Derrek Leute wrote:
In my objects I need to know the document they belong to. To
accomplish this, I created a reference to the currentDocument upon
the object initialization. Simplified Code:
@interface TreeWrapper : NSObject
{
NSDocument *document;
}
- (id) init
{
self = [super init];
if (self != nil) {
document = [[NSDocumentController sharedDocumentController]
currentDocument];
}
return self;
}
Can I point out that this isn't a particularly good idea. The
current document may not in some cases be the document to which the
objects belong. Instead, you want methods like:
- document
- setDocument:
in your TreeWrapper class. Whatever object is responsible for
creating a TreeWrapper object should do something like:
TreeWrapper *newTreeWrapper = [[TreeWrapper alloc] init];
[newTreeWrapper setDocument: [self document]];
Hope that helps,
Mike.
This works fine except it generates compiler warnings as I try and
call methods that are custom to my subclass of NSDocument. The
program compiles and runs as expected though.
If I switch it to MyDocument *document I need to also import
"MyDocument.h". This causes some sort of error where it can't find
the TreeWrapper which is the super class to my data objects.
"error: cannot find interface declaration for 'TreeWrapper',
superclass of '(one of my subclasses)'
It generates this for many of my data objects. The problem seems to
be that including MyDocument.h reincludes my root data object which
is a sub class of TreeWrapper.
Anyone have any ideas?
--Derrek
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