RxSwift【UITableView 分组样式实现】

本文讲解的是RxSwift UITableView的分组（一个或多个section）样式的实现

1、工程依赖库

podfile文件添加依赖库

  pod 'RxSwift'
  pod 'RxCocoa'
  pod 'RxDataSources'

2、ViewController中添加如下代码

//
//  HomeViewController.swift
//  RxSwiftDemo
//
//  Created by wsj_2012 on 2020/8/7.
//  Copyright © 2020 wsj_2012. All rights reserved.
//

import UIKit
import RxSwift
import RxCocoa
import RxDataSources

class HomeViewController: UIViewController {
    
    let disposeBag = DisposeBag.init()
    
    let homeModel = HomeModel()

    lazy var tableView: UITableView = {
        let tableview = UITableView.init(frame: self.view.bounds,style: .plain)
        tableview.tableFooterView = UIView()
        tableview.register(RowViewCell.classForCoder(), forCellReuseIdentifier: "resuseID")
        tableview.rowHeight = 100
        return tableview
    }()
    
  
    // <SectionModel<String, RowModel.Row> 对象类型RowModel.Row须与Model中BehaviorRelay实例中items数组存储的数据对象类型一致
    let dataSource = RxTableViewSectionedReloadDataSource<SectionModel<String, RowModel.Row>>(
           configureCell: { (_, tv, indexPath, element) in
                let cell = tv.dequeueReusableCell(withIdentifier: "resuseID") as? RowViewCell
                cell?.textLabel?.text = "\(element.title!) @ row \(indexPath.row)"
                return cell ?? RowViewCell(style: .default, reuseIdentifier: "resuseID")
           },
           titleForHeaderInSection: { dataSource, sectionIndex in
                return dataSource[sectionIndex].model
           }
       )

    override func viewDidLoad() {
        super.viewDidLoad()
        title = "新闻"
        view.backgroundColor = .white
        // Do any additional setup after loading the view.
        
        setupSubViews()
        bindViewModel()
        updateData()
    }
    
    func setupSubViews() {
        view.addSubview(tableView)
    }
    
    func bindViewModel() -> Void {
        homeModel.groupItems.bind(to: tableView.rx.items(dataSource: self.dataSource)).disposed(by: disposeBag)
    }
    
    func updateData() {
        homeModel.updateGroupModels()
    }
    

}

3、ViewController中用到的HomeModel.swift类

//
//  HomeModel.swift
//  RxSwiftDemo
//
//  Created by wsj_2012 on 2020/8/7.
//  Copyright © 2020 wsj_2012. All rights reserved.
//

import UIKit
import RxDataSources
import RxRelay

class HomeModel: NSObject {
       
    var groupItems = BehaviorRelay(value: [SectionModel(model: "", items: [RowModel.Row.init()])])
    
    func updateGroupModels() {
        var arr: [RowModel.Row] = []
        for i in 0...10 {
            let m = RowModel.Row(title: "标题\(i)", subTitle: "副标题\(i)")
            arr.append(m)
        }
        groupItems.accept([SectionModel(model: "Section", items: arr)])
    }
}

4、ViewController类中的RowViewCell

RowViewCell.swift类自行创建，继承自UITableViewCell