Re: CABasicAnimation : Can I run a CABasicAnimation and get it's updated values on it's progress?
Re: CABasicAnimation : Can I run a CABasicAnimation and get it's updated values on it's progress?
- Subject: Re: CABasicAnimation : Can I run a CABasicAnimation and get it's updated values on it's progress?
- From: "Adam Venturella" <email@hidden>
- Date: Fri, 16 Jan 2009 10:39:34 -0800
Set the volume on an Audio Queue (make a fade out/fade in)
So on the interval, I will call:
AudioQueueSetParameter (queueObject, kAudioQueueParam_Volume, value );
Where value is 0-1
On Fri, Jan 16, 2009 at 10:34 AM, Matt Long <email@hidden> wrote:
> Yes. It's what they're made for. What are you trying to do?
>
> -Matt
>
>
> On Jan 16, 2009, at 11:23 AM, Adam Venturella wrote:
>
>> So something like this would be better served with an NSTimer I take it?
>>
>> On Fri, Jan 16, 2009 at 9:54 AM, Matt Long <email@hidden>
>> wrote:
>>>
>>> Because you can't. These are the only properties you can animate:
>>>
>>>
>>> http://developer.apple.com/DOCUMENTATION/Cocoa/Conceptual/CoreAnimation_guide/Articles/AnimProps.html
>>>
>>> -Matt
>>>
>>>
>>> On Jan 16, 2009, at 10:46 AM, Adam Venturella wrote:
>>>
>>>> Basically, I was thinking: Hey, why can't I use CABasicAnimation as a
>>>> means to animate just a value, not tied to a layer or a view, eg:
>>>>
>>>> If my CABasicAnimation duration is 1 second, and it's fromValue = 0
>>>> and it's toValue = 1 and say the interval was 100 milliseconds
>>>> my value should increment by 0.10 every 100 milliseconds.
>>>> So at 5 seconds my value should be 0.50
>>>>
>>>> Now I could use an NSTimer to do this same thing I suppose, but I
>>>> figured since Core Animation was already setup to handle things like
>>>> this, why not use that.
>>>>
>>>> So my question is, is this even possible? Should I stop trying with
>>>> this approach? Not looking for a how do I do this, more of a yes or
>>>> no answer, I would like to figure it out on my own. Just want to make
>>>> sure I am not barking up the wrong tree to begin with.
>>>
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