On Mar 25, 2014, at 1:56 AM, Remco Poelstra <re...@beryllium.net> wrote:
> David Duncan schreef op 24-3-2014 20:41: >> On Mar 22, 2014, at 2:18 AM, Remco Poelstra <re...@beryllium.net> wrote: >> >>> How can I make sure that some custom drawing method get's called? >> >> >> Call -setNeedsDisplay on the layer (layers are valid by default) > > Hi, > > I tried that, but it only draws the layer once. When I zoom in, the content > becomes pixelated. I tried to subclass CATiledLayer and override > -setAffineTransform to set the contentsScale of all sub layers depending on > the current transform, but that gives all sorts of drawing errors. > Is there a way to keep the custom drawn content sharp? Like with > CAShapeLayers? Is this a CATiledLayer or a CALayer? CALayers don’t redraw like this when you zoom, and while there are a few techniques for doing this yourself, you have to be fairly careful to avoid huge memory spikes. For CATiledLayer you need to ensure the levelOfDetail and levelOfDetailBias is set correctly, but that should be about it. CAShapeLayers redraw automatically because they are vector content and as such can be resized. CALayers and CATiledLayers display bitmap content – tiled layers only get shaper because they are designed to maintain multiple levels of detail. -- David Duncan _______________________________________________ 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
