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POCGContext invalid context 0x0
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    copied!<blockquote> <p>: CGContextSetFillColorWithColor: 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>: CGContextSetStrokeColorWithColor: 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>and similar errors repeated with:</p> <ul> <li>CGContextSaveGState</li> <li>CGContextSetFlatness</li> <li>CGContextAddPath</li> <li>CGContextDrawPath</li> <li>CGContextRestoreGState</li> <li>CGContextSaveGState</li> <li>CGContextSetFlatness</li> <li>CGContextAddPath</li> <li>CGContextDrawPath</li> <li>CGContextRestoreGState</li> <li>CGContextSetFillColorWithColor</li> <li>CGContextSetStrokeColorWithColor</li> <li>CGContextSetFillColorWithColor</li> <li>CGContextSetStrokeColorWithColor</li> <li>CGContextGetBlendMode</li> <li>CGContextSetBlendMode</li> <li>and more...</li> </ul> <p>In my App, I do not use any CGContext stuff. I just have a <code>UITextView</code>, <code>UIButton</code> and <code>UILabel</code>. Not much codes added yet. Just set the content of <code>UITextView</code> by:</p> <pre><code>[self.text_view setText:@"123"]; </code></pre> <p>How to resolve the error ?</p> <p>I'm using Xcode 5.0 (build 5A1413), iOS 7 Simulator (64-bit Retina 4"), Mac OS X 10.8.5</p>
 

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