Re: CALayer question regarding sequence of animations
Re: CALayer question regarding sequence of animations
- Subject: Re: CALayer question regarding sequence of animations
- From: Steve Sheets <email@hidden>
- Date: Tue, 13 Nov 2007 21:01:26 -0500
Troy,
Thank you! It looks like what you described is exactly the type of
control I was looking for. I had examined the CAAnimation object in
detail, but missed the fact the object confirmed to the CAMediaTiming,
thus giving me the beginTime property.
Steve Sheets
Midnight Mage Software
On Nov 13, 2007, at 4:25 PM, Troy Stephens wrote:
On Nov 13, 2007, at 12:10 PM, Steve Sheets wrote:
Good evening all...
Using CAAction or CATransaction, can you create a sequence of
animation (usually changing a CALayer's property) that occur one
after another?
I know you can modify the duration of a single animation using
CATransaction, even eliminate the animation all together. You can
also group a set of animations, so that each one starts at the same
time. However, I want to create a two or more animations that
follow one other, without having to resort to a NSTimer or such. I
want to be able to create this animation in single code segment
(not require timers or callbacks).
For example, I want to create an animation that make a hidden layer
appear (aLayer.hidden=FALSE), moves it to a new position (aLayer.
position=CGPointMake(100.0,100.0), and then fades it back out
(aLayer. hidden=TRUE).
Any thoughts?
See CAAnimation's "beginTime" property (part of the CAMediaTiming
protocol to which CAAnimation conforms).
By collecting animations in a CAAnimationGroup, and setting the
"beginTime" and "duration" of each constituent animation as desired,
you can set the animations up to execute however you like -- in
contiguous sequence, or even with overlap and/or gaps in between them.
--
Troy Stephens
Cocoa Frameworks
Apple, Inc.
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