NSString has methods for normalizing the content using Normalization Forms D, KD, C, and KC. NSAttributedString does not.

Is there any way to normalize an NSAttributedString?

I haven't tried it, but this should work:

        NSAttributedString* original = whatever;
NSMutableAttributedString* normalized = [[original mutableCopy] autorelease];
        CFMutableStringRef str = (CFMutableStringRef)[original mutableString];
        CFStringNormalize(str, kCFStringNormalizationFormD);

This works because -[NSMutableAttributedString mutableString] is a proxy that automatically fixes up the attribute runs held by its owner.

~Martin

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