使用委托Swift选择项后，TableView单元格未更新

Question

我正在尝试为选择项实现委托方法。我在更新tableView单元格时感到困惑。由于我有多个部分，因此列表将是用于不同单元格的部分。如何更新表格视图单元格行或模型，以便重新加载表格视图？

型号：

struct Unit : Codable {

    let sectionList : [SectionList]?

}
struct SectionList : Codable {

    let title : String?
    let items : [Item]?

}

struct Item : Codable {

    let actionType : Int?
    let actionUrl : String?
    let bgColor : String?
    let booleanValue : Bool?
    let textField : String?
    let textValue : String?
    let unitId : Int?
    let latitude : Double?
    let longitude : Double?
    let actionParamData: String?
    let actionTitle: String?
    let pickList: [SectionList]?
    let multiSelect: Bool?
    let selectedValue: [String]?
    let version: Int?
    let masterId: Int?
    let itemValue: String?
}

FirstViewController：

var AppData: Unit?

func listFunc(tvc2: ViewController, didSelectList listValue: String) {
        print(listValue)
        let indexPathRow:Int = 0
        let indexPosition = IndexPath(row: indexPathRow, section: 0)
        tableView.reloadRows(at: [indexPosition], with: .none)
    }

SecondViewController ：（包含列表）

protocol ListDelegate {
    func listFunc(tvc2: ViewController, didSelectList listValue: String)
}

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

        let indexPath = tableView.indexPathForSelectedRow
        let currentCell = tableView.cellForRow(at: indexPath!)!
        //print(currentCell.textLabel?.text as Any)
        currentCell.accessoryType = .checkmark
        delegate?.listFunc(tvc2: self, didSelectList: currentCell.textLabel?.text ?? "")

        let vc = self.storyboard?.instantiateViewController(withIdentifier: "FirstViewController") as! FirstViewController
        self.navigationController?.pushViewController(vc, animated: true)


       }

Answer 1

FirstViewController

class FirstViewController: UIViewControlller, ListDelegate {

   //Click event for navigation from FirstViewController to SecondViewController
   @IBAction func BackButtonAction(_ sender: Any) {
       let vc = self.storyboard?.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
       vc.delegate = self
       self.navigationController?.pushViewController(vc, animated: true)
   }

   func listFunc(listValue: String) {
       tableView.reloadData()
   }
}

SecondViewController

protocol ListDelegate {
    func listFunc(listValue: String)
}

class SecondViewController: UIViewControlller {
    var delegate: ListDelegate?

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let indexPath = tableView.indexPathForSelectedRow
        let currentCell = tableView.cellForRow(at: indexPath!)!
        //print(currentCell.textLabel?.text as Any)
        currentCell.accessoryType = .checkmark
        delegate?.listFunc(listValue: currentCell.textLabel?.text ?? "")
        self.navigationController?.popViewController(animated: true)
   }
}

以上代码可能可以解决您的问题。请尝试此代码。 Happy To Help