Got it. Thanks. David
On Aug 24, 2010, at 11:41 PM, Luke Hiesterman wrote: > Adding a sublayer to self.layer works just like adding a subview to self. > Sublayers are drawn on top of their superlayers. In this case the superlayer > is your view, so the image in the sublayer will be rendered on top of > whatever you draw in drawRect: > > Luke > > Sent from my iPhone. > > On Aug 24, 2010, at 8:47 PM, David F. <[email protected]> wrote: > >> What is the relationship of a UIView's layer (and its sublayers) to what >> happens when that UIView's drawRect: is called? I would expect the code >> below to draw a diagonal line across (i.e. on top of) the image, but it >> looks like the line is drawn behind the image. In other words, all I see is >> the image. >> >> @implementation MyView >> >> - (void)awakeFromNib { >> CALayer *imgLayer = [CALayer layer]; >> imgLayer.position = CGPointMake(self.bounds.size.width / 2, >> self.bounds.size.height / 2); >> imgLayer.bounds = self.bounds; >> imgLayer.contents = (id)[[UIImage imageNamed: @"myimage.jpg"] CGImage]; >> [self.layer addSublayer: imgLayer]; >> } >> >> - (void)drawRect: (CGRect)rect { >> CGMutablePathRef path = CGPathCreateMutable(); >> CGPathMoveToPoint(path, NULL, 0, 0); >> CGPathAddLineToPoint(path, NULL, self.bounds.size.width, >> self.bounds.size.height); >> >> CGContextRef context = UIGraphicsGetCurrentContext(); >> UIColor *black = [UIColor colorWithRed: 0 green: 0 blue: 0 alpha: 0.5]; >> CGContextSetStrokeColorWithColor(context, black.CGColor); >> CGContextSetLineWidth(context, 10); >> CGContextSetLineCap(context, kCGLineCapRound); >> CGContextAddPath(context, path); >> CGContextStrokePath(context); >> CFRelease(path); >> } >> >> @end >> >> Any hints? >> >> Thanks, >> David >> >> _______________________________________________ >> >> 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: >> http://lists.apple.com/mailman/options/cocoa-dev/luketheh%40apple.com >> >> This email sent to [email protected] _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
