将数据从表视图传递到视图控制器 [英] Passing data from table view to view controller

问题描述

当我单击该行时，我正在执行一个功能，然后将转到另一个视图控制器以显示详细信息，但出现错误

i am do a function when i click on the row and then will go to another view controller to show the detail but it's get an error

这是错误 => 致命错误:在展开可选值时意外发现 nil

这是我在表视图 didselectRow 上的代码

this is my code on table view didselectRow

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

    let popup = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "popUp") as! PopupViewController
    let pro_name = preCakeArray[indexPath.row]["pro_name"]
    popup.popUpTitle.text = pro_name as? String
    self.addChildViewController(popup)
    popup.view.frame =  self.view.bounds
    self.view.addSubview(popup.view)
    popup.didMove(toParentViewController: self)
    }

这是我的 ViewController，用于显示弹出窗口等细节

and this is my ViewController to show the detail like popup

class PopupViewController: UIViewController {

@IBOutlet weak var popUpImg: UIImageView!
@IBOutlet weak var popUpTitle: UILabel!
@IBOutlet weak var popUpDes: UILabel!
override func viewDidLoad() {
    super.viewDidLoad()
        }

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}
@IBAction func closeBtn(_ sender: Any) {
    self.view.removeFromSuperview()
}

推荐答案

解决方案 1

您不能在 addChildViewController 时设置标签文本，或者您需要将字符串传递给视图控制器并将该字符串设置为 label .

You can't set label text while addChildViewController or you need to pass string to viewcontroller and set that string to label .

class PopupViewController: UIViewController {

 var strPopTitle: String?

override func viewDidLoad() {
    super.viewDidLoad()
        self.popUpTitle.text = strPopTitle
        }

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