Re: Newbie CALayer Questions
Re: Newbie CALayer Questions
- Subject: Re: Newbie CALayer Questions
- From: Bob Barnes <email@hidden>
- Date: Mon, 21 Jul 2008 07:48:22 -0700
On Jul 20, 2008, at 10:43 PM, Scott Anguish wrote:
that shouldn't be an issue if he's explicitly calling the
setNeedsDisplay
is the method signature correct on your implementation of
drawInContext:?
On 21-Jul-08, at 12:22 AM, Brian Christensen wrote:
On Jul 20, 2008, at 20:00, Bob Barnes wrote:
I have some questions related to CALayer drawing. I want to be able
to display images, text, 2D graphics or a PDF page. I'm able to
display an image by directly setting the contents property using a
CGImageRef or subclassing CALayer, overriding display and sending
setNeedsDisplay, but nothing I do seems to trigger the call to
drawInContext. I've tried using a delegate for the CALayer and
subclassing CALayer, but drawInContext never gets called. Is there
something fundamental that I'm missing?
Is the needsDisplayOnBoundsChange property set to YES on your layer?
I hadn't considered that but I cut and pasted it directly from the
documentation.
- (void)drawInContext(CGContextRef)ctx {
NSLog(@"drawInContext called");
}
Bob
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