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POCGContextFillRects: invalid context - Objective C
 

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    <p>I have this piece of code to give my images a color I need:</p> <pre><code> - (UIImage*)convertToMask: (UIImage *) image { UIGraphicsBeginImageContextWithOptions(image.size, NO, image.scale); CGRect imageRect = CGRectMake(0.0f, 0.0f, image.size.width, image.size.height); CGContextRef ctx = UIGraphicsGetCurrentContext(); // Draw a white background (for white mask) CGContextSetRGBFillColor(ctx, 1.0f, 1.0f, 1.0f, 0.9f); CGContextFillRect(ctx, imageRect); // Apply the source image's alpha [image drawInRect:imageRect blendMode:kCGBlendModeDestinationIn alpha:1.0f]; UIImage* outImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return outImage; } </code></pre> <p>Everything works great in my first view but when I add this to my detail view, it gives me this error (it still works):</p> <blockquote> <p>CGContextSetRGBFillColor: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.</p> <p>CGContextFillRects: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.</p> </blockquote> <p>Any idea how to get rid of this error?</p> <p>Thanks.</p> <p>EDIT:</p> <p>The action was called with nil for image. I easily fixed it by adding a condition. Thanks @ipmcc for the comment.</p> <pre><code> - (UIImage*)convertToMask: (UIImage *) image { if (image != nil) { UIGraphicsBeginImageContextWithOptions(image.size, NO, image.scale); CGRect imageRect = CGRectMake(0.0f, 0.0f, image.size.width, image.size.height); CGContextRef ctx = UIGraphicsGetCurrentContext(); // Draw a white background (for white mask) CGContextSetRGBFillColor(ctx, 1.0f, 1.0f, 1.0f, 0.9f); CGContextFillRect(ctx, imageRect); // Apply the source image's alpha [image drawInRect:imageRect blendMode:kCGBlendModeDestinationIn alpha:1.0f]; UIImage* outImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return outImage; }else{ return image; } } </code></pre>
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    1. USadam
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    1. COThird identical question in two days, second one today.
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    2. COIs your image `nil`? IIRC, the context will be `nil` if you pass 0 for height, width or scale to `UIGraphicsBeginImageContextWithOptions`.
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    3. CO@ipmcc Yeah for some reason the method was called once with nil image. It was an easy fix by adding a condition. It worked on my first view so this didn't come to my mind. Thanks
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