I think you can check font for Cyrillic characters using this function:
CTFontGetGlyphsForCharacters
If it returns False the font is improper.
Question
I know how to get the array of all fonts in iOS. Now I need to check if certain font support Cyrillic characters (Ukrainian alphabet).
La solution
I think you can check font for Cyrillic characters using this function:
CTFontGetGlyphsForCharacters
If it returns False the font is improper.