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POCopying the drawn contents of one UIView to another
 

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    <p>I'd like to take a UITextView and allow the user to enter text into it and then trigger a copy of the contents onto a quartz bitmap context. Does anyone know how I can perform this copy action? Should I override the drawRect method and call [super drawRect] and <em>then</em> take the resulting context and copy it? If so, does anyone have any reference to sample code to copy from one context to another?</p> <p>Update: from reading the link in the answer below, I put together this much to attempt to copy my UIView contents into a bitmap context, but something is still not right. I get my contents mirrored across the X axis (i.e. upside down). I tried using CGContextScaleCTM() but that seems to have no effect.</p> <p>I've verified that the created UIImage from the first four lines do properly create a UIImage that isn't strangely rotated/flipped, so there is something I'm doing wrong with the later calls.</p> <pre><code> // copy contents to bitmap context UIGraphicsBeginImageContext(mTextView.bounds.size); [mTextView.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage* image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); [self setNeedsDisplay]; // render the created image to the bitmap context CGImageRef cgImage = [image CGImage]; CGContextScaleCTM(mContext, 1.0, -1.0); // doesn't seem to change result CGContextDrawImage(mContext, CGRectMake( mTextView.frame.origin.x, mTextView.frame.origin.y, [image size].width, [image size].height), cgImage); </code></pre> <p>Any suggestions?</p>
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