manage UIPageControl and UIScrollView with RxSwift

ScrollViewAndPageControlViewContoller.swift

@IBOutlet weak var pageControll: UIPageControl!
@IBOutlet weak var scrollView: UIScrollView!

var scrollViewPageIndex :Int {
    set {
        let contentX = scrollView.width * CGFloat(newValue)
        DispatchQueue.main.async {
            UIView.animate(withDuration: 0.2, animations: { [weak self] _ in
                self?.scrollView.contentOffset = CGPoint.init(x: contentX, y: 0)
            })
        }
    }
    get {
        return Int(scrollView.contentOffset.x / scrollView.width)
    }
}
var selectedPageIndex = Variable(Int())

final let bag = DisposeBag()

override func viewDidLoad() {
    super.viewDidLoad()
    setupSubViews()

}

private func setupSubViews() {
    selectedPageIndex.asObservable().bindTo(pageControll.rx.currentPage).addDisposableTo(bag)
    scrollView.rx.contentOffset.bindNext { [weak self] (point:CGPoint) in
        guard let _ = self?.scrollView.width else {
            return
        }

        if Int(point.x.truncatingRemainder(dividingBy: (self?.scrollView.width)!)) != 0 {
            return
        }

        self?.selectedPageIndex.value = (self?.scrollViewPageIndex)!

    }.addDisposableTo(bag)
}


@IBAction func pageControlValueChanged(_ sender: UIPageControl) {

    scrollViewPageIndex = sender.currentPage
}

If anyone wants a more succinct version:

let frame = scrollView.rx.frameDidChange.startWith(scrollView.frame)
scrollView.rx.contentOffset
    .withLatestFrom(frame) { ($0, $1) }
    .filter { (_, frame) in frame.width > 0 }
    .map { (offset, frame) in Int(offset.x / frame.width) }
    .distinctUntilChanged()
    .bind(to: pageControl.rx.currentPage)
    .disposed(by: disposeBag)

@ccwasden can you reference to frameDidChange code?