在Swift 4中使用字典填充UITableView数据

var tableData = [
    "Section 1": ["Row 1", "Row 2", "Row 3"],
    "Section 2": ["Row 4", "Row 5"],
    "Section 3": ["Row 6"]
]

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

func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
    let sectionTitles = Array(tableData.keys)
    return sectionTitles[section]
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    let sectionTitles = Array(tableData.keys)
    let sectionKey = sectionTitles[section]
    return tableData[sectionKey]?.count ?? 0
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
    
    let sectionTitles = Array(tableData.keys)
    let sectionKey = sectionTitles[indexPath.section]
    let rowData = tableData[sectionKey]
    cell.textLabel?.text = rowData?[indexPath.row]
    
    return cell
}

func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    let headerView = UIView()
    headerView.backgroundColor = UIColor.lightGray
    return headerView
}

func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
    return 30.0
}