Question

我正在使用RxSwift和RxRealm以及RxRealmDataSources。我的领域对象绑定到表视图。我正试图找到一种方法来根据搜索栏中输入的查询来过滤它。你有没有人这样做过吗？

class ItemsViewController: UITableViewController {

    let bag = DisposeBag()
    let searchController = UISearchController(searchResultsController: nil)
    let search = BehaviorSubject(value: "")

    override func viewDidLoad() {
        super.viewDidLoad()
        searchController.searchResultsUpdater = self
        definesPresentationContext = true
        tableView.tableHeaderView = searchController.searchBar
        bindTableView()
    }

    func bindTableView() {
        let dataSource = RxTableViewRealmDataSource<Item>(cellIdentifier: "itemCell", cellType: UITableViewCell.self) { cell, ip, item in
            cell.textLabel?.text = item.uuid
        }
        Observable.changeset(from: DataStore.sharedInstance.getObjects(Item.self))
            .bind(to: tableView.rx.realmChanges(dataSource))
            .addDisposableTo(bag)
    }

}

extension ItemsViewController: UISearchResultsUpdating {

    public func updateSearchResults(for searchController: UISearchController) {
        search.onNext(searchController.searchBar.text ?? "")
    }

}

Answer 1

最简单的方法是：

func bindTableView() {
    let dataSource = RxTableViewRealmDataSource<Item>(cellIdentifier: "itemCell", cellType: UITableViewCell.self) { cell, ip, item in
        cell.textLabel?.text = item.uuid
    }
    search.asObservable()
        .map { text in DataStore.sharedInstance.getObjects(Item.self).filter("someProperty == %@", text) }
        .flatMap { results in Observable.changeset(from: results) }
        .bind(to: tableView.rx.realmChanges(dataSource))
        .addDisposableTo(bag)
}

Answer 2

https://stackoverflow.com/a/46364131/7694178中的问题可能是多个绑定。试试这个：

let changeset = Observable.changeset(from: DataStore.sharedInstance.getObjects(Item.self))
Observable.combineLatest(changeset, search.asObservable()) { changeset, string in
        return (changeset.0.filter("someProperty == %@", string), changeset.1)
    }
    .bind(to: tableView.rx.realmChanges(dataSource))
    .disposed(by: bag)

如何使用RxSwift，RxRealmDataSources和UISearchController过滤结果？

2 个答案: