为什么委托值没有进入 swift 中的文本字段？

Question

我正在使用委托获取 phone 号码国家代码。

这里我创建了委托：

public protocol CountryListDelegate: class {
func selectedCountry(country: Country)
}

public class CountryList: UIViewController, UITableViewDelegate, UITableViewDataSource, UISearchResultsUpdating {



   public func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath) as! CountryCell
    let country = cell.country!

    self.searchController?.isActive = false
    self.delegate?.selectedCountry(country: country)

    tableView.deselectRow(at: indexPath, animated: true)
    self.tableView.reloadData()
    self.dismiss(animated: true, completion: nil)
}
}

这里我没有得到 countryCodeTextfield 中的值：

class ViewController: UIViewController, CountryListDelegate, UITextFieldDelegate {

@IBOutlet weak var countryCodeTextfield: UITextField!
@IBOutlet weak var counrtryCodeBtn: UIButton!
@IBOutlet weak var mobileNumTextfield: UITextField!

var countryList = CountryList()

     @IBAction func submitBtnAction(_ sender: UIButton) {
    print("in submit")

if sender.tag == 1 {
 if (mobileNumTextfield.text?.count)!<1 {
     Constants.showAlertView(alertViewTitle: "", Message: "Please Enter Mobile Number", on: self)
     return
 }
 self.loginService()
 } else {
 let navController = UINavigationController(rootViewController: countryList)
 self.present(navController, animated: true, completion: nil)
  }

 }
   func selectedCountry(country: Country) {
    print("in country")
    self.countryCodeTextfield.text="+\(country.phoneExtension)"
       print("\(country.flag!) \(country.name!), \(country.countryCode), \(country.phoneExtension)")
   }

上面的 tableview 正在显示，但 selectedCountry 没有调用 print stament 也没有出现。

请帮我写代码。

Answer 1

设置委托

countryList.delegate = self
let navController = UINavigationController(rootViewController: countryList)

Answer 2

将CountryList委托给自己，自己就是委托的ViewController！

//MARK: Create a delegate property in Country List.
 weak var delegate: CountryListDelegate?

创建 CountryList 实例并将其委托分配给自身后

var countryList = CountryList()
countryList.delegate = self

为什么委托值没有进入 swift 中的文本字段？

Why delegate value is not coming to textfield in swift?

delegates

uitableview

ios

swift