What about the option mentioned before of converting to another type, RTF, and 
handling that?

> On Feb 17, 2018, at 3:37 PM, Markus Spoettl <ms_li...@shiftoption.com> wrote:
> 
> On 2/16/18 23:58, Quincey Morris wrote:
>> On Feb 16, 2018, at 14:13 , Markus Spoettl <ms_li...@shiftoption.com> wrote:
>>> how can I go about decoding NSAttributedString
>> I just tried in a playground, and the problem is in NSParagraphStyle, not
>> NSAttributedString. It looks like it falls foul of the known secure coding 
>> issue about
>> decoding arrays of unknown type. (NSTextTab is the only class that lives in 
>> an array
>> within a paragraph style.)
>> That means NSParagraphStyle doesn’t actually conform to NSSecureCoding, and 
>> therefore
>> nor does NSAttributedString, when any non-default tabs are present. It’s not 
>> clear that
>> there’s an easy workaround. The only thing I can think of is to archive the 
>> text tabs
>> separately, and somehow re-install them on the relevant paragraph styles 
>> after
>> decoding, but that’s going to be a huge PITA in general.
> 
> After digging into this a bit further it seems clear to me that there is no 
> solution. It's is not even possible to ignore attributed strings that contain 
> stuff incomprehensible to the secure decoder because the decoder stops 
> working after it hit an exception for an class violation. If your attributed 
> string is at the very end of the decoding process that might work, but if 
> not, your f'd. There is no delegate call to exchange classes or content, to 
> ignore the problem or other way to recover, it just blows up.
> 
> Somebody didn't think this through it seems. Alternatively, I'm just unable 
> to see the solution, which I would prefer...
> 
> Regards
> Markus
> 
> -- 
> __________________________________________
> Markus Spoettl
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