Re: Clipping a CAGradientLayer with a duplicated CAShapeLayer (don't)
Re: Clipping a CAGradientLayer with a duplicated CAShapeLayer (don't)
- Subject: Re: Clipping a CAGradientLayer with a duplicated CAShapeLayer (don't)
- From: Kyle Sluder <email@hidden>
- Date: Thu, 09 Feb 2012 11:25:10 -0800
On Thu, Feb 9, 2012 at 11:09 AM, Fritz Anderson <email@hidden> wrote:
> * Create a duplicate CAShapeLayer (maskL) with [[CAShapeLayer alloc] initWithLayer: shapeL].
> - Adjust the fill color to blackColor, because masking goes by alpha.
The CALayer documentation makes it quite clear that you should never,
ever do this:
"Note: Invoking this method in any other situation will produce
undefined behavior. Do not use this method to initialize a new layer
with an existing layer’s content."
https://developer.apple.com/library/ios/#documentation/GraphicsImaging/Reference/CALayer_class/Introduction/Introduction.html
--Kyle Sluder
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