如何将选定单元格的值传递给另一个 ViewController？

Question

基本上，我有以下UITableViewController，其中包含带有标签的自定义 tableView 单元格。选择单元格后，我希望将单元格的值传递给下一个视图控制器，我在 HTTP POST 响应中使用它。

可以添加什么到didSelectRowAt 以将选定单元格的值传递给呈现的视图控制器？

也许是一个变量？

以下是我的代码：

import UIKit

class ScheduledCell: UITableViewCell {

    @IBOutlet weak var ETALabel: UILabel!
    @IBOutlet weak var cellStructure: UIView!

    @IBOutlet weak var scheduledLabel: UILabel!
    @IBOutlet weak var testingCell: UILabel!
    @IBOutlet weak var pickupLabel: UILabel!
    @IBOutlet weak var deliveryLabel: UILabel!
    @IBOutlet weak var stopLabel: UILabel!
    @IBOutlet weak var topBar: UIView!


}

class ToCustomerTableViewController: UITableViewController, UIGestureRecognizerDelegate {

    var typeValue = String()

    var driverName = UserDefaults.standard.string(forKey: "name")!
    var structure = [AlreadyScheduledStructure]()


    override func viewDidLoad() {
        super.viewDidLoad()

        fetchJSON()


        //Disable delay in button tap
        self.tableView.delaysContentTouches = false

        tableView.tableFooterView = UIView()

    }


    private func fetchJSON() {
        guard let url = URL(string: "https://example.com/example/example"),
            let value = driverName.addingPercentEncoding(withAllowedCharacters: .urlQueryValueAllowed)
            else { return }

        var request = URLRequest(url: url)
        request.httpMethod = "POST"
        request.httpBody = "driverName=\(value)".data(using: .utf8)

        URLSession.shared.dataTask(with: request) { data, _, error in
            guard let data = data else { return }


            do {
                self.structure = try JSONDecoder().decode([AlreadyScheduledStructure].self,from:data)
                DispatchQueue.main.async {
                    self.tableView.reloadData()
                }
            }
            catch {
                print(error)
            }

            }.resume()

    }



    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

        return structure.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let cell = tableView.dequeueReusableCell(withIdentifier: "scheduledID", for: indexPath) as! ScheduledCell
        let portfolio = structure[indexPath.row]
        cell.stopLabel.text = "Stop \(portfolio.stop_sequence)"
        cell.testingCell.text = portfolio.customer
        return cell

    }

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {


        let portfolio = structure[indexPath.row]
        let controller = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "scheduledDelivery")

        print(portfolio.customer)
        controller.navigationItem.title = navTitle
        navigationController?.pushViewController(controller, animated: true)
    }


    override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 200.0
    }

}

Answer 1

为要传递给 scheduleDelivery 控制器的数据创建公共变量。然后将它们设置在 didselect 委托方法中。假设你想通过portfolio.customer。在 scheduleDelivery 控制器上声明以下公共变量。

public var portfilio:String?

然后像这样通过didselect 方法为该变量设置值，

let portfolio = structure[indexPath.row]
let controller = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "scheduledDelivery")
controller.portfilio = portfolio.customer
controller.navigationItem.title = navTitle
navigationController?.pushViewController(controller, animated: true)

Answer 2

将投资组合变量添加到您的下一个 ViewController

   class scheduledDeleivery: UIViewController{
     var customer:String? //suposing this is customer type

然后在 覆盖 func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

    let portfolio = structure[indexPath.row]
    let controller = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "scheduledDelivery") as! shcheduledDeleivery
    controller.customer = porfolio.customer //here is the customer you need to pass to next viewcontroller
    print(portfolio.customer)
    controller.navigationItem.title = navTitle
    navigationController?.pushViewController(controller, animated: true)
}

Answer 3

您可以将单元格的数据存储为变量，然后在准备 segue 函数时将其传递给另一个 ViewController。如果您在为 segue 做准备时调用它，它会在您每次尝试访问该 segue 时自动执行。

var nameOfVar : String = ""

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
var secondVC = segue.destination as！ YourSecondViewController
secondVC.variable = nameOfVar }

希望我有所帮助:)