Unexpectedly found nil while implicitly unwrapping an Optional value

[berkakkerman]

I am trying to show/hide a view with animation. When I use rx.isHidden it is working. But rx.animated.isHidden occurs crash.

My Code:

someObservable. // Observable<Bool>
            .bind(animated: toggleView.rx.animated.isHidden)
            .disposed(by: rx.disposeBag)

Crash from Pod:

extension AnimatedSink where Base: UIView {
    public var isHidden: Binder<Bool> {
        return Binder(self.base) { view, hidden in
            self.type.animate(view: view) {   //  Unexpectedly found nil while implicitly unwrapping an Optional value
                view.isHidden = hidden
            }
        }
    }
}

What am I missing?

[piechart]

Hi @berkakkerman

You need to specify the actual animation to use (e. g. fade) like this

myButton.rx.animated.fade(duration: 0.2).isHidden

[berkakkerman]

Works like a charm. Thank you. @piechart