How to tell which NSTextField was edited?

Question

My NSDocument subclass adopts NSTextFieldDelegate. The document window contains several NSTextField instances (all setup as outlets of the document class). When the user edits a text field, I want my document to be notified. But all the methods in the NSTextFieldDelegate protocol are inherited from NSTextViewDelegate and hence pass NSText* instances in their parameters, NOT NSTextField instances. The same applies to the notification:

- (void) controlTextDidChange:(NSNotification*) notification

So, How do I find out which of the many NSTextField instances is being edited?

NOTE

I need to register undos properly, using the document's undo manager. I tried implementing - (NSUndoManager *)undoManagerForTextView:(NSTextView *)aTextView but this seems to only work with NSTextViews, NOT NSTextFields.

Phillip Mills Phillip Mills · Accepted Answer · 2012-12-17T15:20:08

You can get a reference to your NSTextField as [notification object]. From the documentation for NSControlTextDidChangeNotification:

The notification object is the NSControl object posting the notification.

The actual control subclass will be your NSTextField.

How to tell which NSTextField was edited?

1 Answers