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POHow do I make UILabel display outlined text?
 

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  1. POHow do I make UILabel display outlined text?
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    <p>All I want is a one pixel black border around my white UILabel text. </p> <p>I got as far as subclassing UILabel with the code below, which I clumsily cobbled together from a few tangentially related online examples. And it works but it's very, very slow (except on the simulator) and I couldn't get it to center the text vertically either (so I hard-coded the y value on the last line temporarily). Ahhhh!</p> <pre><code>void ShowStringCentered(CGContextRef gc, float x, float y, const char *str) { CGContextSetTextDrawingMode(gc, kCGTextInvisible); CGContextShowTextAtPoint(gc, 0, 0, str, strlen(str)); CGPoint pt = CGContextGetTextPosition(gc); CGContextSetTextDrawingMode(gc, kCGTextFillStroke); CGContextShowTextAtPoint(gc, x - pt.x / 2, y, str, strlen(str)); } - (void)drawRect:(CGRect)rect{ CGContextRef theContext = UIGraphicsGetCurrentContext(); CGRect viewBounds = self.bounds; CGContextTranslateCTM(theContext, 0, viewBounds.size.height); CGContextScaleCTM(theContext, 1, -1); CGContextSelectFont (theContext, "Helvetica", viewBounds.size.height, kCGEncodingMacRoman); CGContextSetRGBFillColor (theContext, 1, 1, 1, 1); CGContextSetRGBStrokeColor (theContext, 0, 0, 0, 1); CGContextSetLineWidth(theContext, 1.0); ShowStringCentered(theContext, rect.size.width / 2.0, 12, [[self text] cStringUsingEncoding:NSASCIIStringEncoding]); } </code></pre> <p>I just have a nagging feeling that I'm overlooking a simpler way to do this. Perhaps by overriding "drawTextInRect", but I can't seem to get drawTextInRect to bend to my will at all despite staring at it intently and frowning really really hard.</p>
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    1. USMonte Hurd
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    1. COClarification - the slowness is apparent in my app 'cause I'm animating the label when its value changes with a slight grow and shrink. Without subclassing it's smooth, but with the code above the label animation is way choppy. Should I just use a UIWebView? I feel silly doing so as the label is only displaying a single number...
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      1. USMonte Hurd
    2. COOk it looks like the performance problem I was having was unrelated to the outline code, but I still can't seem to get it to vertically align. pt.y is always zero for some reason.
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    3. COThis is very slow for fonts like Chalkduster
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