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UITableViewDelegate vs RxCocoa. Rx framework can be found here - https://github.com/RxSwiftCommunity/RxDataSources
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// Native way | |
var sections = [["Section 1": [1, 2, 3]], | |
["Section 2": [4, 5, 6]]] | |
func numberOfSections(in tableView: UITableView) -> Int { | |
return sections.count | |
} | |
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { | |
return sections[section].count | |
} | |
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? { | |
return sections[section] | |
} | |
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { | |
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) | |
let item = numbers[indexPath.section][indexPath.row] | |
cell.textLabel?.text = item | |
return cell | |
} | |
// new value | |
sections = [...] | |
tableView.reloadData() // no diff comuptation | |
//____________________// | |
// RxDataSource | |
let sections = BehaviorRelay<[SectionModel<String, Int>]>(value: | |
[SectionModel(model: "Section 1", items: [1, 2, 3]), | |
SectionModel(model: "Section 2", items: [4, 5, 6])] | |
) | |
let dataSource = RxTableViewSectionedReloadDataSource<SectionModel<String, Int>>( | |
configureCell: { [unowned self] _, tableView, indexPath, item in | |
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) | |
cell.textLabel?.text = item | |
return cell | |
}, | |
titleForHeaderInSection: { dataSource, sectionIndex in dataSource[sectionIndex].model } | |
) | |
sections.asDriver() | |
.drive(tableView.rx.items(dataSource: dataSource)) | |
.disposed(by: disposeBag) | |
// new value | |
sections.accept([...]) // and here you have diff computation and reloading of only needed cells |
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