I am using RxDatasources to create my datasource. Later on, I configure cells in my view controller. The thing is, cause headers/footers has nothing with datasource (except we can set a title, but if we use custom header footer, this title will be overriden).
Now, this is how I configure my tableview cells:
private func observeDatasource(){
let dataSource = RxTableViewSectionedAnimatedDataSource<ConfigStatusSectionModel>(
configureCell: { dataSource, tableView, indexPath, item in
if let cell = tableView.dequeueReusableCell(withIdentifier: ConfigItemTableViewCell.identifier, for: indexPath) as? BaseTableViewCell{
cell.setup(data: item.model)
return cell
}
return UITableViewCell()
})
botConfigViewModel.sections
.bind(to: tableView.rx.items(dataSource: dataSource))
.disposed(by: disposeBag)
}
now cause
dataSource.titleForHeaderInSection = { dataSource, index in
return dataSource.sectionModels[index].model
}
... won't work, cause I want to load a custom header and populate it with data from RxDatasource, I wonder what would be a proper way to:
- get data from my datasource which is defined in my view model
- populate header, based on a section (I have multiple sections) with correct data, in the way that is always up to date with a datasource.
Here is my view model:
class ConfigViewModel{
private let disposeBag = DisposeBag()
let sections:BehaviorSubject<[ConfigStatusSectionModel]> = BehaviorSubject(value: [])
func startObserving(){
let observable = getDefaults()
observable.map { conditions -> [ConfigStatusSectionModel] in
return self.createDatasource(with: conditions)
}.bind(to: self.sections).disposed(by: disposeBag)
}
private func getDefaults()->Observable<ConfigDefaultConditionsModel> {
return Observable.create { observer in
FirebaseManager.shared.getConfigDefaults { conditions in
observer.onNext(conditions!)
} failure: { error in
observer.onError(error!)
}
return Disposables.create()
}
}
private func createDatasource(with defaults:ConfigDefaultConditionsModel)->[ConfigStatusSectionModel]{
let firstSectionItems = defaults.start.elements.map{ConfigItemModel(item: $0, data: nil)}
let firstSection = ConfigStatusSectionModel(model: defaults.start.title, items: firstSectionItems.compactMap{ConfigCellModel(model: $0)})
let secondSectionItems = defaults.stop.elements.map{ConfigItemModel(item: $0, data: nil)}
let secondSection = ConfigStatusSectionModel(model: defaults.stop.title, items: secondSectionItems.compactMap{ConfigCellModel(model: $0)})
let sections:[ConfigStatusSectionModel] = [firstSection, secondSection]
return sections
}
}
Now what I was able to do, is to set a tableview delegate, like this:
tableView.rx.setDelegate(self).disposed(by: disposeBag)
and then to implement appropriate delegate method(s) to create / return custom header:
extension BotConfigViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView,
viewForHeaderInSection section: Int) -> UIView? {
guard let header = tableView.dequeueReusableHeaderFooterView(
withIdentifier: ConfigSectionTableViewHeader.identifier)
as? ConfigSectionTableViewHeader
else {
return nil
}
return header
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return UITableView.automaticDimension
}
func tableView(_ tableView: UITableView, estimatedHeightForHeaderInSection section: Int) -> CGFloat {
return 40
}
}
How to populate my custom header with data from my datasource? I don't want to do things like switch (section){...}, cause then its completely not in sync with a datasource, but rather manually, and if datasource changes, it won't affect on header configuration automatically.
Here are my model structs:
typealias ConfigStatusSectionModel = AnimatableSectionModel<String, ConfigCellModel>
struct ConfigItemData {
let conditionsLink:String?
let iconPath:String?
}
struct ConfigItemModel {
let item:OrderConditionModel
let data:ConfigItemData?
}
struct ConfigCellModel : Equatable, IdentifiableType {
static func == (lhs: ConfigCellModel, rhs: ConfigCellModel) -> Bool {
return lhs.model.item.symbol == rhs.model.item.symbol
}
var identity: String {
return model.item.symbol
}
let model: ConfigItemModel
}
I tried to use this but I wasn't able to make it work completely, cause I guess I wasn't providing custom header in a right way/moment.
