But now, I want to delete 'myButton' class, but when I tried to
delete, Alert panel is poped up.
Alert panel says, "Class myButton is in use. Cannot delete.".
I confirmed all other Classes or Instances's Outlets and Actions,
but there was not reference to myButton.
How can I find link to myButton class?
What can I do for deleting myButton class?
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The button you had subclassed probably still has the custom
'myButton' class set in the Custom Class pane of the object inspector
of Interface Builder. Just select the button in your nib's window or
wherever it is, open the inspector to the Custom Class pane
(Command-5), and choose NSButton instead of 'myButton'. Then you
should be able to delete myButton in the nib window's Classes tab.
