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Qasa Lee18,915 Points
How to understand "func keyboardWillShow(_ notification: Notification)" be called in the selector without parameter?
I know in the
#selector() we just have to pass in the name of the method we're calling, but how can
keyboardWillShow(_ notification: Notification) know the
notification without giving any clue?
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow), name: Notification.Name.UIKeyboardWillShow, object: nil)
the code above can send the exact
notification to the function
Or just because the
#selector(self.keyboardWillShow) can grab the
notification since it knows this comes from