TextView invoke becomeFirstResponder crash

I had some crash when perform [self.sendPanel.inputTextView becomeFirstResponder],inputTextView inherits from UITextview, crash stack is in the log below. This is a system crash? I need some help.

crash log

crash log EXC_BAD_ACCESS
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I had some crash when perform …

Please post a full crash report. See Posting a Crash Report for my advice on how to do that.

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