swift - 在tableviewcell中进行segue的委托(delegate)方法

Question

我有一个委托(delegate)方法，如果我按下表格 View 中的按钮，它应该转向另一个 View Controller 并传递数据，但它似乎不起作用。

func goToVC(uid: String) { //delegate method
    performSegue(withIdentifier: "showVC", sender: self) //Do I need this
}

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    performSegue(withIdentifier: "showVC", sender: self)
    self.tableView.deselectRow(at: indexPath, animated: true)
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "showVC" {
        if let indexPath = tableView.indexPathForSelectedRow {
            let guestVC = segue.destination as! GuestViewController
            guestVC.ref = userArray[indexPath.row].ref
        }
    }

Answer 1

class MainViewController: UIViewController {

    // set the cell's delegate in the data source
    // pass the object to the cell from the data source
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        cell.mainViewControllerDelegate = self
        cell.object = someArray[indexPath.row]

    }

    // this is the method that gets called by the cell through the delegate
    func pushToViewController(object: YourDataObject) {

        let destination = SomeViewController()
        destination.object = object
        navigationController?.pushViewController(destination, animated: true)

    }

}

class TheTableViewCell: UITableViewCell {

    // create a delegate and a data object
    var mainViewControllerDelegate: MainViewController?
    var object: YourDataObject?

    // this is the method that gets called when the button in the cell is tapped
    @objc func buttonAction() {

        mainViewControllerDelegate?.pushToViewController(object: object)

    }

}

我强烈建议初学者不要使用Interface Builder。你越早使用它，你就会越快了解更多。 Interface Builder 对于初学者来说是愚人节。