RE: Shared Instance of a class
RE: Shared Instance of a class
- Subject: RE: Shared Instance of a class
- From: "Christopher Hickman" <email@hidden>
- Date: Fri, 19 May 2006 16:42:52 -0400
Careful. If its in a nib, it may not receive an init. I ran into this
before, and had to put my init code in awakeFromNib.
I'll just quote someone more knowledgeable:
On 5/3/06, Ondra Cada wrote:
>> IB doesn't init it when it is instantiated? I didn't realize.
>
>That's a difficult area. Of course all the objects *are* init'd, but
>the concrete init method used changes (at the first look, at
>least :)) in a totally random way :) It tends to be initWithCoder:
>often, but not always, depending on the NIB layout details which you
>don't want to learn actually (I did, and forgot happily long ago :)).
> -----Original Message-----
> From: cocoa-dev-bounces+tophu=email@hidden
> [mailto:cocoa-dev-bounces+tophu=email@hidden] On
> Behalf Of Mike Abdullah
> Sent: Friday, May 19, 2006 3:46 PM
> To: Tommy Nordgren
> Cc: email@hidden
> Subject: Re: Shared Instance of a class
>
> Cheers guys. I hadn't realised that you could use static outside of
> a method. This way I can set the value in my object's init method :)
>
> Mike.
>
> On 19 May 2006, at 19:41PM, Tommy Nordgren wrote:
>
> >
> > On 19 maj 2006, at 19.42, Mike Abdullah wrote:
> >
> >> I have a custom class that I instanciate in my MainMenu
> nib. What
> >> I want to do is be able to issue the command:
> >>
> >> [MyClass sharedInstance]
> >>
> >> and get that particular instance of the class. I know how to do
> >> this with a class that is only instanciated once the
> >> sharedInstance message is received, but the object pre-exists.
> >>
> >> NSDocumentController is capable of this. Any ideas?
> >>
> >> Mike.
> >> _______________________________________________
> > In your implementation file have a static pointer to
> your class.
> > Assign self to it in your awakeFromNib method.
> > Now you can have a class method that returns the shared instance,
> > or throws an exception if it's not defined.
> > ------------------------------------------------------
> > "Home is not where you are born, but where your heart finds peace" -
> > Tommy Nordgren, "The dying old crone"
> > email@hidden
> >
> >
>
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