Re: NSMutableArray is null?
Re: NSMutableArray is null?
- Subject: Re: NSMutableArray is null?
- From: Pierce Freeman <email@hidden>
- Date: Tue, 31 Mar 2009 19:35:13 -0700
- Thread-topic: NSMutableArray is null?
Ken:
Note to self, don't go writing to support boards when I am already half
asleep. ;) I realize that now, and I understand what instance variables
are, just I couldn't think of the name when I was writing my original post.
And in my instance variable programming, I forgot that you have to run this
no matter if it is an instance variable or not:
globalVariable = [[NSMutableArray alloc] init];
On 3/31/09 7:19 PM, "Ken Thomases" <email@hidden> wrote:
> On Mar 31, 2009, at 9:12 PM, Pierce Freeman wrote:
>
>> Whoops, sorry I didn't put that in...
>>
>> @interface Example_Class : NSObject {
>>
>> IBOutlet NSTableView *tableView;
>> NSMutableArray *globalVariable;
>> }
>
> That's not a global variable. It's an instance variable. That's a
> massive conceptual error, and you should do your best to understand
> why you made it before going much further. Perhaps reading Apple's
> guide to Object-Oriented Programming with Objective-C would help:
>
> http://developer.apple.com/documentation/Cocoa/Conceptual/OOP_ObjC/index.html
>
> Next, what you showed is the declaration of the variable. The
> variable is a pointer, which may point to an object. Declaring a
> pointer does not allocate or initialize the object, nor make the
> pointer point to the object (or anything in particular). You have to
> do that separately.
>
> Regards,
> Ken
>
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