What does the "force" parameter do in UIView.endEditing?

Question

In what situation will self.view.endEditing(true) and self.view.endEditing(false) produce different results?

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The docs for func endEditing(force: Bool) -> Bool state the following for the parameter force:

Specify true to force the first responder to resign, regardless of whether it wants to do so.

Answer 1

As the comment mentioned, if canResignFirstResponder returns false, self.view.endEditing(true) will cause the control to lose focus but self.view.endEditing(false) will not.