以编程方式创建分组样式的UITableView

import UIKit

class GroupedTableViewController: UITableViewController {

    let sections = ["Section 1", "Section 2", "Section 3"]
    let items = [["Item 1", "Item 2", "Item 3"], ["Item 1", "Item 2", "Item 3"], ["Item 1", "Item 2", "Item 3"]]

    override func viewDidLoad() {
        super.viewDidLoad()

        tableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")
    }

    // MARK: - Table view data source

    override func numberOfSections(in tableView: UITableView) -> Int {
        return sections.count
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return items[section].count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)

        cell.textLabel?.text = items[indexPath.section][indexPath.row]

        return cell
    }

    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
        return sections[section]
    }

    override func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? {
        return "Section Footer"
    }

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        print("Selected item: \(items[indexPath.section][indexPath.row])")
    }
}