Re: Parent-Child References
Re: Parent-Child References
- Subject: Re: Parent-Child References
- From: Jason Barker <email@hidden>
- Date: Fri, 14 Apr 2006 21:23:14 -0600
WOW! Talk about getting more that what you paid for. I appreciate all
of this information. The third tip solved my initial problem. I'm
actually doing my classes with first letter caps but I will
restructure my code to follow the MVC design pattern.
Thanks!
Jason
On Apr 14, 2006, at 8:27 PM, mmalcolm crawford wrote:
On Apr 14, 2006, at 5:55 PM, Jason Barker wrote:
I have a subclass of NSView (myView) with an NSMutableArray
(myArray) of objects (myObject).
You should typically give classes a name that begins with a capital
letter.
<http://developer.apple.com/documentation/Cocoa/Conceptual/
CodingGuidelines/index.html>
When an instance of myObject is created, I want to assign it a
pointer to myView.
*Assuming this is a data-bearing object*, it is likely that you
shouldn't be doing that:
<http://developer.apple.com/documentation/Cocoa/Conceptual/
CocoaFundamentals/CocoaDesignPatterns/chapter_5_section_4.html>
But when I put the '#import' statement in myObject's header file
and declare a variable of type myView in myObject's header file
and compile it, I get an error that says: error: parse error
before "myObject" (which error is generated in the subclass of
NSView). If I remove the #import statement and change the data
type of the instance of myView to simply NSView (i.e. NSView
*aView;), the project compiles just fine. Is there a problem with
this circular referencing scenario that the compiler won't allow it?
It sounds like you need to use @class as a forward declaration:
<http://developer.apple.com/documentation/Cocoa/Conceptual/
ObjectiveC/Articles/chapter_4_section_5.html>
(then put the #import into your .m file).
mmalc
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