I don't recall the title but there was a recent WWDC video that includes this topic. It's not a one step process but not that hard either.
Sent from my iPhone > On 2014/02/12, at 8:43, Rick Mann <rm...@latencyzero.com> wrote: > > In my app, I annotate a floor plan with lines of arbitrary length and > location, capped with circles (like stretchy barbells). The UZ design calls > for collapsing these into a single circle placed at the center of the line > when they're not being edited. There can be many (probably not more than 10 > or 20) of these lines scattered over the floor plan. > > I'd like to animate the collapse and expansion of these barbells, all at a > time. They do not live in their own views, but rather are drawn in one large > overlay view that spans the screen, in -drawRect:. > > Can I leverage Core Animation, or should I just make a timer and animate it > myself (by repeatedly calling -setNeedsDisplay on my overlay view)? > > I could try to make these drawn with CAShapeLayers, but during editing, the > user can drag one end or the other around arbitrarily. A layer that just > bounds the barbell would have to dynamically change size as the user does > this, or be sized full-screen, which might consume a lot of memory; I'm not > sure. > > -- > Rick _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
