There's a great macro available for creating singletons on the cocoa
with love blog. It's dead simple to use and it does override init and
copy methods to make sure only one instance is created.
On Jun 12, 2009, at 8:50 AM, Michael Ash <michael....@gmail.com> wrote:
On Fri, Jun 12, 2009 at 4:13 AM, Quincey
Morris<quinceymor...@earthlink.net> wrote:
On Jun 12, 2009, at 00:27, Michael Ash wrote:
Singleton-ness is a property of the API, not the
implementation. If the API provides a single instance which you use,
then it's a singleton. Enforcing that single instance is entirely up
to the implementation of the API. It's not a necessary feature of a
singleton, and it's not even necessarily a good feature to have.
Perhaps so. I'm not inclined to insist on my perspective if you
feel it
misrepresents the situation enough to comment on it.
I'll point out, though, that there is no inherent singleness in
Brad's
situation (that is, barring information about the application
design that's
not been part of the discussion, there's no obvious reason why he
can't
choose to have multiple main window controllers) *beyond* the
proposed
decision to implement [MainWindowController
sharedWindowController]. That
proposal was a pragmatic solution to a design problem that didn't
really
involve the cardinality of main window controllers. That last point
is
really the point I was trying to make.
Fair enough. I just didn't want others to think that if they wanted a
"true" singleton then they had to go through and override alloc, init,
etc., the way certain Apple sample code does. Nothing more.
Mike
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