RxSwift how to know end of TableView reload

问题:

i want know end of reloadTableView Then I want to scroll down to the bottom of the table view.

Before I used RxSwift Just after reloadData It was possible using setContentOffSet or ScrollToRow.

I tried it with the code I found. never called endUpdates.

var replyList : BehaviorRelay<[Reply]>!

func bind(){

    replyViewModel.replyList
       .asDriver()
       .drive(replyTableView.rx.items){ [weak self] (tableView,row,item) in
           return self?.makeReplyCell(tableView: tableView, replyInfo: item) ?? UITableViewCell()

                }
       .disposed(by: disposeBag)

    replyTableView.endUpdatesEvent
        .asObservable()
        .subscribe({ _ in
            print("Scroll To Bottom")
        })
        .disposed(by: disposeBag)
}

import Foundation
import RxCocoa
import RxSwift

extension UITableView {

    /// Reactive wrapper for `UITableView.insertRows(at:with:)`
    var insertRowsEvent: ControlEvent<[IndexPath]> {
        let source = rx.methodInvoked(#selector(UITableView.insertRows(at:with:)))
                .map { a in
                    return a[0] as! [IndexPath]
                }
        return ControlEvent(events: source)
    }

    /// Reactive wrapper for `UITableView.endUpdates()`
    var endUpdatesEvent: ControlEvent<Bool> {
        let source = rx.methodInvoked(#selector(UITableView.endUpdates))
                .map { _ in
                    return true
                }
        return ControlEvent(events: source)
    }

    /// Reactive wrapper for when the `UITableView` inserted rows and ended its updates.
    var insertedItems: ControlEvent<[IndexPath]> {
        let insertEnded = Observable.combineLatest(
                insertRowsEvent.asObservable(),
                endUpdatesEvent.asObservable(),
                resultSelector: { (insertedRows: $0, endUpdates: $1) }
        )
        let source = insertEnded.map { $0.insertedRows }
        return ControlEvent(events: source)
    }
}