Hi,
Firstly, I'm assuming the more information button is the only location
which triggers displaying/redisplaying.
if thats the case I would just store the instance of your class in a property
and make sure it will be created only once.
You can accomplish this by simply overwriting the getter method like this:
-(your class) foo {
if (!_foo) {
_foo = [[yourclass alloc]init];
}
return _foo;
}
be careful about mem managment. above is good for a retain property!
best regards,
oliver
Von meinem iPhone gesendet
Am 14.03.2013 um 19:22 schrieb Pax <45rpmli...@googlemail.com>:
> I don't really know how to describe what I'm trying to do except as a
> 'Pseudo' Singleton. I have a class with an NSWindow, which displays
> information. It is run by selecting an NSMenuItem called 'More Information…'
>
> My issue is that I only want one instance of the Information class to be
> loaded at a given time (and therefore only one information window on screen
> at a given time). If the information window is already loaded and it is then
> reselected from the menu then the existing window needs to be brought to the
> front - nothing more.
>
> I have currently resolved it by making my class a singleton - but that's not
> the right answer because it means that I can't release information window and
> its class when it gets closed, resulting in a minor leak (only minor because,
> as a singleton, the instance is only ever loaded once anyway). Even so, this
> is one leak too many - and I'be grateful if someone could tell me the correct
> way to do what I am trying to do.
>
> Currently, I am setting to be a singleton as follows:
>
> static informationWindow *singletonManager = nil;
>
> @implementation informationWindow
>
> //Code to handle singleton
> + (id)singleton
> {
> @synchronized(self)
> {
> if(singletonManager == nil)
> singletonManager = [[super allocWithZone:NULL] init];
> }
> return singletonManager;
> }
>
> + (id)allocWithZone:(NSZone *)zone
> {
> return [[self singleton] retain];
> }
>
> - (id)copyWithZone:(NSZone *)zone
> {
> return self;
> }
>
> - (id)retain
> {
> return self;
> }
>
> - (unsigned)retainCount
> {
> return UINT_MAX;
> }
>
> - (oneway void)release
> {
>
> }
>
> - (id)autorelease
> {
> return self;
> }
>
>
> I'm not using ARC. All suggestions gratefully received!
>
> _______________________________________________
>
> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
> https://lists.apple.com/mailman/options/cocoa-dev/info%40entwicklerfuchs.de
>
> This email sent to i...@entwicklerfuchs.de
_______________________________________________
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
