Re: Strange retainCount from NSTimer
Re: Strange retainCount from NSTimer
- Subject: Re: Strange retainCount from NSTimer
- From: "Michael Ash" <email@hidden>
- Date: Thu, 13 Mar 2008 23:06:53 -0400
On Thu, Mar 13, 2008 at 9:37 PM, Brian Greenstone <email@hidden> wrote:
> I'm hoping someone can shed some light on this for me. I'm getting
> some unusual retainCount values from the following code:
>
> NSTimer *theTimer;
>
> theTimer = [NSTimer scheduledTimerWithTimeInterval:1.0
> target: self
> selector: @selector(timerCallback)
> userInfo: nil
> repeats: YES];
>
> NSLog(@"A: retain count: %i", [theTimer retainCount]);
>
> [[NSRunLoop currentRunLoop] addTimer: theTimer forMode:
> NSDefaultRunLoopMode];
>
> NSLog(@"B: retain count: %i", [theTimer retainCount]);
>
>
> The output I get is:
>
> A: retain count: 2
> B: retain count: 2
>
>
> But that shouldn't be, right? Shouldn't the retainCount of theTimer
> be 1 after scheduledTimerWithTimeInterval? Then shouldn't it be
> bumped up to 2 after adding the timer to the Run Loop?
The timer creation *already* adds it to the runloop (this is why it
has "scheduled" in the name), which gives you a retain count of 2 and
causes the manual scheduling to do nothing at all.
Mike
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