Re: NSAttributedString mysteriously truncated too soon
Re: NSAttributedString mysteriously truncated too soon
- Subject: Re: NSAttributedString mysteriously truncated too soon
- From: Matt Neuburg <email@hidden>
- Date: Fri, 09 Nov 2012 07:08:53 -0800
On Nov 8, 2012, at 4:24 PM, Quincey Morris <email@hidden> wrote:
> On Nov 8, 2012, at 13:23 , Matt Neuburg <email@hidden> wrote:
>
>> The result (and this is the problem) is that the label truncates after the **first line** of the second paragraph ("Four score and seven years ago, our fa…"). Why? There's plenty of room in my label for more lines!
>
> I believe it's just a quirk of the way the text system divides responsibility, which is in turn a consequence of the archeology of text capabilities. Paragraph styles let you specify *one* line (with truncation) or *multiple* lines (without truncation). There is a separate option that truncates the last line of a multiple-line paragraph (NSStringDrawingTruncatesLastVisibleLine), but AFAICT the only way to apply this option is via 'drawWithRect:options:context:' -- I don't think there's any way to specify the option as a string attribute. So, this text drawing style would require a custom view rather than a UILabel.
>
Yes, this turned out to be exactly right. I was misled by the repeated mantra in the WWDC 2012 videos about UILabel being your basic "nexus of power" for attributed strings. That mantra is a lie. It turns out that UILabel is your "nexus of inconvenience": it doesn't play very well with attributed strings, especially attributed strings with a paragraph style. As you suggested, I replaced my label with a plain-vanilla view that just draws the string directly using drawWithRect:... and all is well. Thanks. m.
--
matt neuburg, phd = email@hidden, http://www.apeth.net/matt/
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