Cannot be used in Objective-C project.

[lm2343635]

In the lasted version, show method cannot be found in Objective-C project.
I found the reason. TimeInterval(Double) is not existed in Objective-C, so the show method cannot transfer to a Objective-C method.
I try to use NSNumber to pass the parameter, but banner cannot be shown.

@objc open func showForOC(_ view: UIView? = Banner.topWindow(), duration: NSNumber? = nil) {
    self.show(view, duration: duration?.doubleValue)
}