Re: Cocoa: animate the scale and alpha of NSImageView
Re: Cocoa: animate the scale and alpha of NSImageView
- Subject: Re: Cocoa: animate the scale and alpha of NSImageView
- From: Kyle Sluder <email@hidden>
- Date: Wed, 30 Jul 2014 11:18:25 -0500
On Wed, Jul 30, 2014, at 09:44 AM, Eric E. Dolecki wrote:
> Coming from iOS, this kind of thing is simple. For OS X I'm floundering
> trying to find something similar.
>
> I have an NSImageView. I want to animate the scale and alpha of it -
> looping forever. It's a ring image in it.
>
> I've seen documentation in regards to the CoreAnimation framework, but my
> Xcode 6b4 doesn't have it for Cocoa.
>
> Is there an easy way to do this? I'd like to avoid using a layer if
> possible (I put things on top of it), but a layer solution works if it's
> smoother and I can hide it.
Yeah, a layer is definitely easiest. (There's actually some confusion
regarding whether layers are required to have alpha at all, in fact. The
docs say that alpha requires layer-backing, but I'm pretty sure they
snuck in a standard compositing-based approach that works in some
cases.)
--Kyle Sluder
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