如何使用Swift更新UITableView？

Question

I'm trying to populate a table view from a SQlite database. Tickets get printed in the console, but nothings shows up on the table view. What's the proper way to update and refresh? Here is my code. Thanks!

import UIKit
import SQLite

class TicketTableViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    var tickets = [String]()
    @IBOutlet weak var table: UITableView!

    override func viewDidLoad() {
        super.viewDidLoad()
        let dm = DatabaseManager.shared
        let db = dm.db!
        do {
            for row in try db.prepare(dm.tickets) {
                let ticket = row[dm.pick]
                tickets.append(ticket)
                debugPrint(ticket)
            }
            table.reloadData()
        } catch {}
    }

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return tickets.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "ticket")!
        cell.detailTextLabel!.text = tickets[indexPath.row]
        return cell
    }     
}

Answer 1

Dynamic table views needs to know their delegate and datasource. If you didn't set the delegate and datasource, you can add them programmatically in your viewDidLoad function. Like this:

override func viewDidLoad() {
        super.viewDidLoad()

        //Set delegate and datasource
        table.delegate = self
        table.dataSource = self

        let dm = DatabaseManager.shared
        let db = dm.db!
        do {
            for row in try db.prepare(dm.tickets) {
                let ticket = row[dm.pick]
                tickets.append(ticket)
                debugPrint(ticket)
            }
            table.reloadData()
        } catch {}
    }