I have a CALayer subclass, set to redraw on bounds change, with the
following draw code (I don't expect it to be meaningful, but I'm
pasting it here for the sake of completeness.)
- (void)drawInContext:(CGContextRef)ctx
{
CGRect bounds = CGContextGetClipBoundingBox(ctx);
CGContextDrawImage(ctx, CGRectMake(0,0,18,
bounds.size.height-18),sideImage);
CGContextDrawImage(ctx, CGRectMake(0,bounds.size.height-18,18,
18),cornerImage);
CGContextDrawImage(ctx,
CGRectMake(18,bounds.size.height-18,bounds.size.width-36,18),topImage);
CGContextScaleCTM (ctx, -1.0, 1.0);
CGContextTranslateCTM ( ctx, -bounds.size.width, 0.0);
CGContextDrawImage(ctx,
CGRectMake(0.0,bounds.size.height-18,18,18),cornerImage);
CGContextDrawImage(ctx,
CGRectMake(0.0,0.0,18,bounds.size.height-18),sideImage);
}
It's parent view is set up to change the layers frame to always fill
the contents of the entire view on resizeWithOldSuperviewSize:. This
works great, except for a really annoying flicker that occurs once
every few seconds while the view is resizing. Every layer in the view
flickers in and out (stuff like background colors doesn't flicker).
Did I miss some drawing cleanup or something else obvious here?
(I've tried doing this automatically with constraint managers, same
problem...)
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