ios - 在uitableview部分中选择行

Question

大家好，我想问一下我想在tableview部分中选择行，当我选择该部分行时，它将显示一个alertController。但它没有显示，我在第0部分中有另一种方法，它可以工作，但是为什么在我要选择的部分中它不起作用。你能帮助我吗？

func numberOfSections(in tableView: UITableView) -> Int {
        return 5
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        if indexPath.section == 0 {
            let selectSchoolVC = SelectSchoolPopUpVC()
            selectSchoolVC.modalPresentationStyle = .fullScreen
            selectSchoolVC.modalTransitionStyle   = .crossDissolve
            present(selectSchoolVC, animated: true, completion: nil)
        } else if indexPath.section == 1 {

        } else if indexPath.section == 2 {

        } else if indexPath.section == 3 {

        }

        let alert = UIAlertController(title: nil, message: nil, preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "Log Out", style: .destructive, handler: { (_) in

            ProfileServices.shared.signOutUser()

            let signInVC = SigninViewController()
            let navController = UINavigationController(rootViewController: signInVC)
            self.present(navController, animated: true)
        }))

        tableView.deselectRow(at: indexPath, animated: true)
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if indexPath.section == 0 {
            let cell = tableView.dequeueReusableCell(withIdentifier: "selectId", for: indexPath) as! SelectSchoolCell

            return cell

        } else if indexPath.section == 1 {
            return UITableViewCell()
        } else if indexPath.section == 2 {
            let cell = tableView.dequeueReusableCell(withIdentifier: "BadgedCell", for: indexPath) as! BadgeCell
            cell.accessoryType = .disclosureIndicator

            let item = infoArray[indexPath.row]
            cell.nameLbl.text       = item["title"]
            cell.badgeString        = item["badge"] ?? ""
            cell.badgeTextColor     = .white
            cell.badgeColor         = .red

            return cell
        } else if indexPath.section == 3 {
            let cell = tableView.dequeueReusableCell(withIdentifier: "helpId", for: indexPath)
            let helpsArray = helpArray[indexPath.row]

            cell.textLabel?.text = helpsArray
            cell.textLabel?.textColor = #colorLiteral(red: 0.2, green: 0.2, blue: 0.2, alpha: 1)
            cell.textLabel?.font = UIFont(name: "NunitoSans-SemiBold", size: 16)
            cell.accessoryType = .disclosureIndicator
            return cell
        }

        let cell = tableView.dequeueReusableCell(withIdentifier: "signOutId", for: indexPath)
        return cell
    }

Answer 1

您实际上从未显示过警报:

let alert = UIAlertController(title: nil, message: nil, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Log Out", style: .destructive, handler: { (_) in

ProfileServices.shared.signOutUser()

let signInVC = SigninViewController()
let navController = UINavigationController(rootViewController: signInVC)
self.present(navController, animated: true)
}))
You need to present the alert here, by doing something like:
self.present(alert, animated: true)
self.navigationController?.present(alert, animated: true, completion: nil)