Error entering text in text field: _NSLayoutTreeLineFragmentRectForGlyphAtIndex invalid glyph index 7

Question

The application crashes when entering text in the uitextfiled file and receiving errors, for example: _NSLayoutTreeLineFragmentRectForGlyphAtIndex is an invalid glyph index 7. Any help would be greatly appreciated.

Answer 1

The material __NSLayoutTreeLineFragmentRectForGlyphAtIndex invalid glyph index(as far as I know) does not cause a malfunction.

But, apparently, the main reason for both the failure and the incorrect glyph. Such errors appear in places like custom subclasses NSTextStorage -processEditingwhen you make changes to text storage, when the layout is executed, and / or vice versa.

TextKit

, . :

• TextKit (!) , UITextField, . .
• , . NSTextStorageDelegate .
• , . ( , , :))

; , , :

• NSGlyphGenerator, . . , .
• NSTypesetter, , .
• NSLayoutManager, . - .
• NSTextStorage . , .

, , , , .

, , :)