I haven't tried it myself but this sounds like a bug in IB rather than in your own code.
Perhaps you should take a stab at writing a minimal test case, then if that demonstrates that it really is a bug, file a radar. On 5/12/15, Roland King <r...@rols.org> wrote: > >> On 12 May 2015, at 14:43, Graham Cox <graham....@bigpond.com> wrote: >> >> I'm exploring the use of the new IB_DESIGNABLE macro to preview a custom >> view live in IB. >> >> It keeps complaining that my view is taking too long to draw, over 200mS, >> which seems to be a limit built into IB. However, when I measure the time >> myself for drawing, it's nowhere near this long - 10mS max, typically 2mS. >> Because of this constant and apparently erroneous complaint, IB doesn't >> show my custom view. I've even tried to do some minimal drawing (just >> filling the dirty rect) for just the Interface Builder target, but I get >> the same problem, so it's pretty clear that the timeout is nothing to do >> with my drawing. >> >> At other times IB complains that the rendering agent "crashed", though >> it's actually an exception from the bowels of Core Graphics. My usual >> drawing code never triggers the same exception, only when it's drawn by >> the IB rendering agent. >> >> Has anyone been able to make this work? >> >> --Graham > > I have been able to make it work but it's not been a trouble-free > experience. There was at least one version of Xcode I couldn't make it work > at all. I've had other times that a quit/restart was needed to get it going. > > I suspect that this is not your problem but I will mention I have a bug > report out that the IB render code calls initWithFrame: which isn't required > in Swift and I hadn't in one case implemented it, so it just crashed, or > hung or both. You're most-likely in obj-c so that is unlikely to be your > issue. You could override it anyway just for good measure. > > The docs and the WWDC video say the custom control must be in a framework > but I believe that's not actually true, or no-longer true as of the released > Xcode 6? There was a note somewhere about this but I can't find it now and > neither can google. > > You can debug these IB designable things. I found that if I was able to get > the view to enable the Debug Selected Views menu item then it seemed IB was > mostly happy with the control. > > Not entirely helpful I know - I just bashed my head against the brick wall > for a while until it worked. > _______________________________________________ > > 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/mdcrawford%40gmail.com > > This email sent to mdcrawf...@gmail.com -- Michael David Crawford, Consulting Software Engineer mdcrawf...@gmail.com http://www.warplife.com/mdc/ Available for Software Development in the Portland, Oregon Metropolitan Area. _______________________________________________ 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
