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POUILabel default kerning different from CATextLayer
 

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    <p>I have a <code>UILabel</code> with the string 'LA'. I also have a <code>CATextLayer</code> with the same characters in an <code>NSAttributedString</code> assigned to its <code>string</code> property. The kerning in the <code>UILabel</code> is noticeably different from the <code>CATextLayer</code>. Here's the code.</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; // // UILabel // UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(20, 50, 280, 100)]; label1.text = @"LA"; label1.backgroundColor = [UIColor clearColor]; label1.font = [UIFont fontWithName:@"Futura" size:90.0]; [self.view addSubview:label1]; // // CATextLayer // UILabel *label2 = [[UILabel alloc] initWithFrame:CGRectMake(20, 130, 280, 100)]; label2.backgroundColor = [UIColor clearColor]; CATextLayer *textLayer = [[CATextLayer alloc] init]; textLayer.frame = label2.layer.bounds; textLayer.contentsScale = [[UIScreen mainScreen] scale]; [label2.layer addSublayer:textLayer]; NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:@"LA"]; CTFontRef aFont = CTFontCreateWithName((__bridge CFStringRef)@"Futura", 90.0, NULL); [string addAttribute:(NSString*)kCTFontAttributeName value:(__bridge id)aFont range:NSMakeRange(0, [string length])]; textLayer.string = string; [self.view addSubview:label2]; } </code></pre> <p>Here's <a href="http://tumtiki-github.s3.amazonaws.com/kerning.png">an image</a> of the results.</p> <p>Why is the kerning different between these two methods and what am I doing wrong in the <code>CATextLayer</code> example?</p>
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    1. USMichael Luton
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      1. USharoldcampbell
 

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