Re: Custom class method problem

• Subject: Re: Custom class method problem
• From: Phil - Pub <email@hidden>
• Date: Fri, 2 Sep 2005 19:34:13 -0400
• Delivered-to: email@hidden
• Delivered-to: email@hidden

On Sep 2, 2005, at 7:19 PM, Shawn Erickson wrote:

On Sep 2, 2005, at 4:01 PM, Phil - Pub wrote:

Shawn,

Thanks for the reply.  Now a follow-up...

On Sep 2, 2005, at 6:04 PM, Shawn Erickson wrote:

On Sep 2, 2005, at 2:48 PM, Phil - Pub wrote:

I've run out of ideas on what I'm doing wrong here..

This isn't a Objective-C language question, in the future use the Cocoa-dev list found on the same site you found this list.

I debated sending to cocoa-dev but the answers provided seem to indicate that this was the right choice even though this problem involves Cocoa, the root issue seems to be my understanding of what Objective C needs/is doing. Please read on...

This list isn't really about programming question in Objective-C but the language itself, its theory, runtime implementation, etc.

Got it and I'll use cocoa-dev going forward for this type of question.

It was my (mis?)understanding that initialization of class objects would happen automatically when I call [[myObject alloc] init]. Your information tells me I need to handle object allocation in the class myself which is fine if that's what needs to be done... just trying to understand what needs to happen.

Yes you allocate objects when you need them and assign pointers to point at them.

That's what I was missing.

However, I copied and pasted this snippet and it caused some compiler warnings:
/Users/phil/Documents/Development/Mac OS X/Projects/Test - Cocoa App/test.m:19: warning: multiple methods named '-init' found
/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h: 72: warning: using '-(id)init'
/Users/phil/Documents/Development/Mac OS X/Projects/Test - Cocoa App/test.m:18: warning: also found '-(void)init'

as well as runtime errors:
2005-09-02 18:13:33.241 Test - Cocoa App[2287] *** - [NSCFDictionary setAttributeName:forKey:]: selector not recognized [self = 0x306c10]
2005-09-02 18:13:33.241 Test - Cocoa App[2287] *** Uncaught exception: <NSInvalidArgumentException> *** -[NSCFDictionary setAttributeName:forKey:]: selector not recognized [self = 0x306c10]

Well I wrote it in mail... so I am not surprise I mistyped something in the 1 minute I spent responding.

-(void)init should be...

-(id)init {
    attributeList = [[NSMutableDictionary alloc] init];
    return self;
}

That did the trick.

-Shawn

Thanks again for your help and the information!

Phil
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