> On 15 Oct 2015, at 00:03, David Duncan <david.dun...@apple.com> wrote:
>
>
>> On Oct 14, 2015, at 4:02 AM, Gerriet M. Denkmann <gerr...@mdenkmann.de>
>> wrote:
>>
>> I put into some iOS 9 app (Xcode 7.0) 4 UILabels.
>> All have Clip Subviews = off, font size 96 with a coloured background, text
>> plain = “ฟี้กุฎุมพี”.
>>
>> The difference is the font:
>>
>> System: ok (but is too bold for my taste)
>> Thonburi and Thonburi Light: bottom get cut off
>> System Light: bottom gets cut off rather much
>>
>> System also uses Thonburi as font substitution.
>>
>> With Clip Subviews = on the characters get clipped to the coloured
>> background, which is even worse.
>> Note: some characters go well beyond the descender line (as specified by the
>> font) and also above the line height.
>>
>> How can I get a UILabel which does not maim my characters?
>> (Another question would be: how to get a background which covers all of the
>> characters. But this is not important to me right now)
>>
>> These UILabels are ultimately meant to go into UITableViewCells (without
>> coloured background).
>
> You will probably need to use an attributed string that specifies a taller
> line height than normal. This happens automatically when the system language
> is set to languages such as Thai, but not for other languages, as it would
> apply to all text strings.
Thanks for this hint.
And thanks a lot to Alex for his very helpful code example!
Moving the baseLine up by about 8 % and increasing the LineHeight by 5 %
finally (after lots of fiddling) gives me an acceptable UILabel with SystemFont
Light.
CGFloat baseChangePercent = +8;
CGFloat lineChangePercent = +5;
CGFloat baselineOffset = fontSize * baseChangePercent / 100 ;
CGFloat lineHeightMultiple = 1 + lineChangePercent / 100;
NSMutableParagraphStyle *paragraph = [ [ NSMutableParagraphStyle alloc ] init ];
paragraph.lineHeightMultiple = lineHeightMultiple;
attributes = @{ NSBaselineOffsetAttributeName: @(baselineOffset),
NSFontAttributeName:
font,
NSParagraphStyleAttributeName:
paragraph,
};
But of course these values are heavily dependent on the font (and maybe even on
fontSize).
How to compute these numbers directly (as opposed to trial and error)?
Kind regards,
Gerriet.
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