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POCrash using [UIBezierPath CGPath] with CAShapeLayer under ARC
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  1. POCrash using [UIBezierPath CGPath] with CAShapeLayer under ARC
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    copied!<p>I'm getting a BAD ACCESS error using <code>[UIBezierPath CGPath]</code> with <code>CAShapeLayer</code> under ARC. I've tried bridging in various ways but I'm not clear if that is the problem. I have isolated the crash to using the result of the <code>makeToPath</code> method:</p> <pre><code> maskLayer = [CAShapeLayer layer]; maskLayer.path = [self makeToPath]; </code></pre> <p>But this doesn't crash:</p> <pre><code> maskLayer = [CAShapeLayer layer]; maskLayer.path = [self makeFromPath]; </code></pre> <p>Is there something invalid with the path created by <code>makeToPath</code>? I'm planning to use the <em>from</em> and <em>to</em> paths with a <code>CABasicAnimation</code> once I sort this crash out. What is the correct ARC bridging for <code>CGPathRef</code>s from <code>UIBezierPath</code>?</p> <pre><code>-(CGPathRef)makeToPath { UIBezierPath* triangle = [UIBezierPath bezierPath]; [triangle moveToPoint:CGPointZero]; [triangle addLineToPoint:CGPointMake(self.view.frame.size.width,0)]; [triangle addLineToPoint:CGPointMake(0, self.view.frame.size.height)]; [triangle closePath]; return [triangle CGPath]; } -(CGPathRef)makeFromPath { UIBezierPath*rect = [UIBezierPath bezierPathWithRect:self.view.frame]; return [rect CGPath]; } </code></pre> <p><strong>UPDATE</strong> So I changed my .h file per an answer below but I am still getting the crash</p> <pre><code>-(CGPathRef)makeToPath CF_RETURNS_RETAINED; -(CGPathRef)makeFromPath CF_RETURNS_RETAINED; </code></pre> <p>I also tried making my methods return a <code>UIBezierPath</code> instance per the answer <a href="https://stackoverflow.com/a/14130159/840992">here</a> (shown below). Still no success. Anyone want to give me the longform explanation on how to fix this?</p> <pre><code>maskLayer.path = [[self makeToPath] CGPath];// CRASHES morph.toValue = CFBridgingRelease([[self makeToPath] CGPath]);// CRASHES </code></pre> <hr> <pre><code>-(UIBezierPath*)makeToPath { UIBezierPath* triangle = [UIBezierPath bezierPath]; [triangle moveToPoint:CGPointZero]; [triangle addLineToPoint:CGPointMake(self.view.frame.size.width,0)]; [triangle addLineToPoint:CGPointMake(0, self.view.frame.size.height)]; [triangle closePath]; return triangle; } </code></pre>
 

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