如何在Swift中获取表格视图单元格的数据总和？

var data = [Int]() // 存储数据的数组

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
    
    // 设置单元格的数据
    let cellData = data[indexPath.row]
    cell.textLabel?.text = "\(cellData)"
    
    return cell
}

func calculateDataSum() -> Int {
    var sum = 0
    
    for cellData in data {
        sum += cellData
    }
    
    return sum
}

let totalSum = calculateDataSum()
print("数据总和：\(totalSum)")