resignFirstResponder()
Notifies the receiver that it’s been asked to relinquish its status as first responder in its window.
Declaration
func resignFirstResponder() -> BoolDiscussion
The default implementation returns true, resigning first responder status. Subclasses can override this method to update state or perform some action such as unhighlighting the selection, or to return false, refusing to relinquish first responder status.
Use the NSWindow makeFirstResponder(_:) method, not this method, to make an object the first responder. Never invoke this method directly.