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Re: Core animation
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Re: Core animation



Am Jun 30, 2008 um 07:04 schrieb Papa-Raboon:

I was wondering if many of you have had a go at core animation yet?
I am personally looking at making a piece of text fade in and fade out as a
confirmation that something worked in my latest project. Currently I am just
popping a bit of text on screen using:
[succcessFlag setStringValue:@"Record Added"];


I presume we are talking pretty simple here but the question is how simple.
If any of you knows of any cool tutorials on really quick and simple core
animation text effects could you please give me the heads up.

It's difficult to know exactly what you need based on what you wrote above. Do you really need to drop down to Core Animation layers or would AppKit's animation proxies be good enough for your purposes? Is there a reason you would need to manipulate a CATextLayer directly? Is "successFlag" supposed to be a layer or is it an NSTextField?


If successFlag is in fact an NSTextField (or, for that matter, any NSView or subclass thereof), then [[successFlag animator] setHidden:YES] (or setHidden:NO) should give you a default fade effect, provided a superview somewhere up the view hierarchy is layer backed.

Here are some excellent starting points for learning OS X animation technologies. I highly recommend reading these guides. A "cool tutorial" should not be a substitute for reading Apple's documentation, IMHO:

<http://developer.apple.com/documentation/GraphicsImaging/Conceptual/Animation_Overview/Introduction/chapter_1_section_1.html#//apple_ref/doc/uid/TP40004952-CH9-SW1 >

<http://developer.apple.com/documentation/Cocoa/Conceptual/CoreAnimation_guide/index.html#//apple_ref/doc/uid/TP40004514 >

<http://developer.apple.com/documentation/Cocoa/Conceptual/AnimationGuide/index.html#//apple_ref/doc/uid/TP40003592 >

Following that, Bill Dudney is authoring a Core Animation book (currently in beta, available in PDF form right now) that seems to be coming along nicely so far: <http://www.pragprog.com/titles/bdcora/core-animation-for-os-x >

/brian

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