アラートのテキストフィールドからテキストを取得し、セルのテキストラベルにするにはどうすればよいですか？

Question

class CoursesTableViewController: UITableViewController { 
    var nameOfCourse = ""; 

    @IBAction func newCourse(_ sender: AnyObject) { 
      //1. Create the alert controller. 
      // var nameOfCourse = ""; 
      let alert = UIAlertController(title: "New Course", message: "Enter the course name.", preferredStyle: .alert); 

      //2. Add the text field. You can configure it however you need. 
      alert.addTextField(configurationHandler: { (textField) -> Void in 
       textField.placeholder = "" 
      }) 

      //3. Grab the value from the text field, and print it when the user clicks OK. 
      alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) -> Void in 
       let textField = alert.textFields![0] as UITextField 

       self.nameOfCourse = textField.text! 

       print(self.nameOfCourse) 
      })) 

      alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: { (action) -> Void in 
      })) 

      // 4. Present the alert. 
      self.present(alert, animated: true, completion: nil) 
    } 

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
     let cells = tableView.dequeueReusableCell(withIdentifier: "cells", for: indexPath) as? CoursesTableViewCell 

     cells?.textLabel.text = self.nameOfCourse 

     return cells! 
    } 

Answer 1

nameOfCourse（以下print(self.nameOfCourse)）を正常に設定した後、テーブルビューを再読み込みします。