Re: Detecting when a text view becomes First Responder
Re: Detecting when a text view becomes First Responder
- Subject: Re: Detecting when a text view becomes First Responder
- From: Ken Thomases <email@hidden>
- Date: Wed, 11 Nov 2015 17:14:40 -0600
On Nov 11, 2015, at 5:04 PM, Graham Cox <email@hidden> wrote:
>
> I need to know when a text view becomes First Responder. I thought the notification NSTextDidBeginEditingNotification would do it, but that’s only sent when the user starts typing in the text view, which is too late for my purposes.
>
> Is there another notification that I could use that signals a view has become FR? I couldn’t see anything either specific to NSTextView (or NSText) or views/responders in general. I’d prefer not to have to use a text view subclass if possible, though if that’s the only way so be it.
You can either use a subclass of NSTextView and override its -becomeFirstResponder method or you can use KVO to observe the firstResponder property of the window and, each time it changes, check if it's your text view.
Regards,
Ken
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