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I've been working on a bug now on and off (because it's driving me crazy) for a couple of weeks now, and I just can't seem to get to the bottom of it so I'm reaching out in hopes someone can shed some light on this for me...

I've got a basic UITextView setup in a XIB file and have set the font using an included font, but not the default (in this case "Avenir") and then I'm using a couple of lines of code to change the line height by using the Attributed Text property. I should also mention I'm using ARC.

The output looks perfect on an iPad mini (or the normal iPad on the simulator) but on an iPad retina (or retina simulator) the output get's knocked back to the system default font - Helvetica, although it maintains the line spacing.

I've tried creating the UITextView programatically rather than in the XIB and still no luck. Here is the code I'm using to set the Attributed Text:

NSString *string = theTextView.text;

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.minimumLineHeight = 48.f;

NSMutableAttributedString *aStr = [[NSMutableAttributedString alloc] initWithString:string];
[aStr addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0,[string length])];

theTextView.attributedText = aStr;

From what I can tell, on a retina device, for some reason the UITextView seems to be holding a double set of attributed strings. When I print

NSLog(@"Font Attributes: %@", theTextView.attributedText);

This is the output I get:

Non Retina

Font Attributes: Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Nam liber te conscient to factor tum poen legum odioque civiuda.
{
    NSColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSFont = "<UICFFont: 0x714c930> font-family: \"Avenir-Roman\"; font-weight: normal; font-style: normal; font-size: 24px";
    NSKern = 0;
    NSParagraphStyle = "Alignment 4, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 48/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n), DefaultTabInterval 36, Blocks (null), Lists (null), BaseWritingDirection 0, HyphenationFactor 0, TighteningFactor 0, HeaderLevel 0";
    NSStrokeColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSStrokeWidth = 0;
}

Retina

Font Attributes: Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Nam liber te conscient to factor tum poen legum odioque civiuda.
{
    NSColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSFont = "<UICFFont: 0x71ed950> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12px";
    NSKern = 0;
    NSParagraphStyle = "Alignment 4, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 48/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n), DefaultTabInterval 36, Blocks (null), Lists (null), BaseWritingDirection 0, HyphenationFactor 0, TighteningFactor 0, HeaderLevel 0";
    NSStrokeColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSStrokeWidth = 0;
}
{
    NSColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSFont = "<UICFFont: 0x71e67d0> font-family: \"Avenir-Roman\"; font-weight: normal; font-style: normal; font-size: 24px";
    NSKern = 0;
    NSParagraphStyle = "Alignment 4, LineSpacing 0, ParagraphSpacing 0, ParagraphSpacingBefore 0, HeadIndent 0, TailIndent 0, FirstLineHeadIndent 0, LineHeight 48/0, LineHeightMultiple 0, LineBreakMode 0, Tabs (\n), DefaultTabInterval 36, Blocks (null), Lists (null), BaseWritingDirection 0, HyphenationFactor 0, TighteningFactor 0, HeaderLevel 0";
    NSStrokeColor = "UIDeviceRGBColorSpace 0 0 0 1";
    NSStrokeWidth = 0;
}

I've created a simple example project of the problem on GitHub as well -

https://github.com/mpatteson/UITextViewBug

Any ideas?

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3 に答える 3

2

私は同じ問題を抱えています。Retina 以外のデバイスとシミュレーターでは機能しましたが、Retina デバイスまたはシミュレーターに切り替えたとき、フォントは標準の helvetica で、出力は同じでした。私にとっては、コードでフォントを直接指定したときに機能しました（Interface Builderでは正しく設定されていました）。したがって、次のような行を追加します。

UIFont *font = [UIFont fontWithName:@"Avenir-Roman" size:24.0];
[aStr addAttribute:NSFontAttributeName value:font range:NSMakeRange(0,[string length])];
于 2013-04-28T16:07:08.800 に答える