StackOverflow2013

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POQuartz 2D Text Drawing Errors in Encoding and Transformation?
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copied!<p>I'm working on a Text Addition feature for my App. This text is going to be added with CGContext and Quartz 2D. The variable <code>text</code> is pulled from a UITextField's text property.</p> <p>Here is the code I have so far:</p> <pre><code>CGRect textBox = CGRectMake(0, 0, 300, 200); UIView *textView = [[UIView alloc] initWithFrame:textBox]; const char *textChar = [text UTF8String]; NSInteger xLocation = (contentOffset.x + 100); CGContextSelectFont (UIGraphicsGetCurrentContext(), "Helvetica", 14.0f, kCGEncodingMacRoman); CGContextSetShouldSmoothFonts(UIGraphicsGetCurrentContext(), YES); CGContextSetCharacterSpacing (UIGraphicsGetCurrentContext(), 10); CGContextSetTextDrawingMode (UIGraphicsGetCurrentContext(), kCGTextFill); CGContextSetRGBFillColor (UIGraphicsGetCurrentContext(), 255, 255, 255, 1.0); CGContextShowTextAtPoint (UIGraphicsGetCurrentContext(), xLocation, 110, textChar, 9); [drawGallery addSubview:textView]; </code></pre> <p>I have a few problems with this:</p> <ol> <li><p>The text is rendering flipped - (this is easily rectified with a transform, but the tutorial I followed didn't have this issue so I'm confused a little <a href="http://developer.apple.com/library/mac/#documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_text/dq_text.html#//apple_ref/doc/uid/TP30001066-CH213-TPXREF103" rel="nofollow noreferrer">LINK</a>).</p></li> <li><p>The text is rendering with strange characters - I think this is an encoding issue, but how do i adjust this?</p></li> <li><p>The text doesn't get added to the view at the <code>addSubview</code> line, it only gets added when the CGContext is updated, i.e. I have a draw lines function too and if I draw on the view then the text magically pops up.</p></li> <li><p>The text is horribly jagged and badly rendered, is there something I can do for this? I've added a <code>CGContextSetShouldSmoothFonts</code> but it doesn't seem to be doing anything.</p></li> </ol> <p>See below for an example:</p> <p><img src="https://i.stack.imgur.com/CaozJ.png" alt="strange characters"></p> <p>Thanks for any help you can give.</p>

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