Re: Synthesised properties and additional actions
Re: Synthesised properties and additional actions
- Subject: Re: Synthesised properties and additional actions
- From: Eeyore <email@hidden>
- Date: Sun, 19 Jun 2011 07:23:03 -0700
Here is a trick I saw somewhere else that might do what you need. On the other hand, i'm still learning cocoa myself so it may have drawbacks that I'm unaware of.
Create a private property (like internal_foo below) to handle memory. Then have a public property to do the other stuff. So users of the class access the property with "foo" and you get synthesized memory management with internal_foo.
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On Jun 18, 2011, at 10:12 PM, Graham Cox <email@hidden> wrote:
> If I synthesize a property, is it possible to also directly invoke some other code when that property is set (other than the usual KVO)? That is, I need to do something like:
>
>
>
> @synthesize internal_foo;
>
>
> - (void) setFoo:(id) newFoo
> {
> self.internal_foo = newFoo;
>
> [self doSomethingElseAsWell];
> }
>
-(id) foo
{
return self.internal_foo;
}
>
> Is this kind of thing possible? It looks to me as if the self.foo = line will incur an infinite loop. But if the property is synthesized, to what would I assign the new value?
>
> --Graham
>
>
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