Re: How to Optimize drawRect: for obscured views?
Re: How to Optimize drawRect: for obscured views?
- Subject: Re: How to Optimize drawRect: for obscured views?
- From: René van Amerongen <email@hidden>
- Date: Sun, 12 Nov 2006 22:56:20 +0100
On 11/11/06, Andrew Farmer <email@hidden> wrote:
On 11 Nov 06, at 16:46, E. Wing wrote:
> I have a custom view which may have animation. I use an NSTimer to
> fire periodically and I check to see if anything is animating in my
> view. If so, I call setNeedsDisplay:YES.
>
> If I minimize or hide the application, I notice that drawRect:
stops
> being called by the system (which I consider good). But if my
> view/window is completely obscured by another window (say another
> window from my app or from another application such as Safari) , I
> noticed that drawRect: is still being called.
Yes. That's intentional; while your view may not be exposed at that
given moment,
Sometimes your view could be behind a transparant window.
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