使用RxSwift筛选具有变量id的领域结果

我想使用 Variable 在Rxswift中,使caseResults使用不同的boxId搜索不同的结果,如 boxId == 1 获取结果和 boxId == 2 获取其他结果

class MainViewModel {

    let cases: Driver<[CaseItemViewModel]>
    let index = Variable<Int>(1)

    init() {
        let caseResults = realm.objects(RMCase.self)
                            .filter("boxId == \(index.value)")
                            .sorted(byKeyPath: "id", ascending: true)


        self.cases = Observable.collection(from: caseResults)
            .asDriverOnErrorJustComplete()
            .map { results in results.map { CaseItemViewModel(with: $0) }}
    }
}


class CaseItemViewModel {
    let cased: RMCase
    let id: Int
    let boxId: Int
    let name: String

    init(with cased: RMCase) {
        self.cased = cased
        self.id = cased.id
        self.boxId = cased.boxId
        self.name = cased.name
    }
}

在ViewController中

    viewModel.boxs
        .drive(tableView.rx.items(cellIdentifier: CellId.main.rawValue, cellType: MainTableViewCell.self)) { [weak self] row, item, cell in
            guard let strongSelf = self else { return }

            cell.setup(with: item)

            // drive collectionView into tableViewCell
            if let collectionView = cell.collectionView {

                strongSelf.viewModel.cases.asObservable()
                    .bind(to:collectionView.rx.items(cellIdentifier: "testcell", cellType: MainCollectionViewCell.self)) { _row, _item, _cell in

                     _cell.setup(with: _item)
                    }
                    .disposed(by: cell.disposeBag)
            }

            }.disposed(by: disposeBag)