Good tip! Thanks, Dave and Quincey. I was pretty sure the problem was something embarrassingly basic.
The next step is to redesign the CircleOverlayView to fill its view with black except for the center of the circle. I already learned that filling the view with black and then filling the circle with clearColor() doesn’t work! My guess is, you do this by adding a mask layer; but you probably don’t redraw the mask in drawRect(), hm? It should never need to be refreshed unless the bounds change. Assuming I can figure out how to make a mask layer, what is the correct way to monitor for a bounds change in order to recreate the mask? -- Charles On February 24, 2016 at 03:16:00, David Duncan ([email protected]) wrote: > On Feb 23, 2016, at 7:17 PM, Quincey Morris > <[email protected]> wrote: > > On Feb 23, 2016, at 18:50 , Charles Jenkins <[email protected]> wrote: >> >> I draw based on the overlay view’s frame, NOT based on the rect that gets >> passed in to drawRect(). I must not understand what that parameter is for. > > From the UIView documentation for ‘drawRect’: > >> The portion of the view’s bounds that needs to be updated. The first time >> your view is drawn, this rectangle is typically the entire visible bounds of >> your view. However, during subsequent drawing operations, the rectangle may >> specify only part of your view. > > > So, yes, your code is right now. :) > Its almost right – drawing should be done based on the bounds not the frame (this will be an issue if you either use the frame.origin or if you transform the view). > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > 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/david.duncan%40apple.com > > This email sent to [email protected] -- David Duncan _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
