Use nested function as action for `UIButton` - swift

Question

I'm trying to add a target to my UIButton, but get an error when trying to use a nested function as its action.
Here's my code:
func createAddView() {
let addButton = UIButton()
func remove(sender: UIButton) {
print("Remove")
}
addButton.addTarget(self, action: #selector(remove(sender:)), for: .touchUpInside)
}
it is giving me this warning:
warning: No method declared with Objective-C selector 'remove'.
I need the ´remove´ function to be nested in the ´createAddView´function because I need to remove and fade out some other UIViews that is being create in the ´createAddView´ function
Anyone knows how I can do this?

Answer 1

You can't do this, cause func remove is exist only in func createAddView block.
There is no restriction to add one #selector() to multiple UIControl's. So you can declare func remove in class block and add it as #selector every time you create a new button.

Answer 2

Because the func remove is create within createAddView() method .
here´s the fixed code :
func createAddView() {
let view = UIView() //added for testing purposes
view.frame = CGRect(x: 0, y: 0, width: 320 , height: 640) //added for testing purposes
let addButton = UIButton()
addButton.frame = CGRect(x: 0, y: 0, width: 100, height: 50) //added for testing purposes
view.addSubview(addButton)
addButton.addTarget(self, action: #selector(remove(sender:)), for: .touchUpInside)
}
func remove(sender: UIButton) {
UIView.animate(withDuration: 0.3, delay: 0, options: UIViewAnimationOptions.allowUserInteraction, animations: { () -> Void in
print("Add")
}) {(Bool) -> Void in
print("Done")
}
}