ios - _hideForKeyboardAppearance error when clicking on UITextView -

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i have uitextview, , whenever click on it, app crashes following error:

-[__nssetm _hideforkeyboardappearance]: unrecognized selector sent instance 0x7fb8aa76cd60

if run app multiple times, crashes @ same place, intercepting object throwing "unrecoginzed selector" can different. uiimage instead of nssetm, sometimes, uiconstraint, etc.

even if don't assign uitextview specific outlet in class, or have assigned delegate, same behavior. happens on both simulator , hardware.

any ideas going on?

p.s. ios 8. crash happens on both iphone , ipad.

edit: note happens though the uitextview calls no code. removed outlet connections in storyboard, , made class doesn't implement uitextviewdelegate. still crashes. why puzzled , wondered if has ever encountered this. 1 thing note view controller having issue buried several screens deep within uisplitviewcontroller. not sure if ui elements buried deep in nav stack somehow intercepting keyboard call?


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