Swift4 RxSwift RxDataSources UIT

import Foundation
import UIKit

import RxSwift
import RxCocoa
import RxDataSources
import Differentiator

struct MySection {
    var header: String
    var items: [Item]
}

extension MySection : AnimatableSectionModelType {
    typealias Item = Int
    
    var identity: String {
        return header
    }
    
    init(original: MySection, items: [Item]) {
        self = original
        self.items = items
    }
}

class BJTableViewSimpleViewController : UIViewController {
    @IBOutlet var tableView: UITableView!
    
    let disposeBag = DisposeBag()
    
    var dataSource: RxTableViewSectionedAnimatedDataSource<MySection>?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        tableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")
        
        let dataSource = RxTableViewSectionedAnimatedDataSource<MySection>(
            configureCell: { ds, tv, ip, item in
                let cell = tv.dequeueReusableCell(withIdentifier: "Cell") ?? UITableViewCell(style: .default, reuseIdentifier: "Cell")
                cell.textLabel?.text = "Item \(item)"
                
                return cell
        },
            titleForHeaderInSection: { ds, index in
                return ds.sectionModels[index].header
        }
        )
        
        self.dataSource = dataSource
        
        let sections = [
            MySection(header: "First section", items: [
                1,
                2
                ]),
            MySection(header: "Second section", items: [
                3,
                4
                ])
        ]
        
        Observable.just(sections)
            .bind(to: tableView.rx.items(dataSource: dataSource))
            .disposed(by: disposeBag)
        
        tableView.rx.setDelegate(self)
            .disposed(by: disposeBag)
    }
}

extension BJTableViewSimpleViewController : UITableViewDelegate {
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        
        // you can also fetch item
        guard let item = dataSource?[indexPath],
            // .. or section and customize what you like
            let _ = dataSource?[indexPath.section]
            else {
                return 0.0
        }
        
        return CGFloat(40 + item * 10)
    }
}

注：如自定xib，请注册cell。storyboard中可以省略注册cell。