All of the examples I can find of setting up a notification look like this:
[nc addObserver:self selector:@selector(keyboardWillShow:) name: UIKeyboardWillShowNotification object:nil];
where object is always being set to nil. object is the notificationSender, which is defined thusly in the documentation:
"The object whose notifications the observer wants to receive; that is, only notifications sent by this sender are delivered to the observer. When nil, the notification center doesn’t use a notification’s sender to decide whether to deliver it to the observer."
I want to receive the keyboard notification only for one particular text view, so I want to tell addObserver that, but I don't know what to give it for the object. I tried the outlet variable that's bound to the text view I'm interested in, but that just resulted in my getting no notifications at all.
Any suggestions?
The UIKeyboardWillShowNotification is coming from your window instance, and for all intents and purposes is a "system" notification. The keyboard is either showing or not showing, it's not really something that is tied to a specific control.
If you want to do something when a user enters a specific text field, you should probably control that in the text field's delegate instead.