Ios 未调用委托函数
在这里,我试图使用协议将值从一个类Ios 未调用委托函数,ios,swift,Ios,Swift,在这里,我试图使用协议将值从一个类LanguageSelectionTVC传递到另一个类RegistrationVC 当我尝试调用方法self.delegate?.setselectedlanguages(self.languagesSpokenArray)insidelanguagesselectiontvc时,它不会调用类setselectedlanguages注册VC中的方法 protocol LanguageSelectionTVCProtocol { func setSelec
LanguageSelectionTVC
传递到另一个类RegistrationVC
当我尝试调用方法self.delegate?.setselectedlanguages(self.languagesSpokenArray)
insidelanguagesselectiontvc
时,它不会调用类setselectedlanguages
注册VC中的方法
protocol LanguageSelectionTVCProtocol {
func setSelectedLangauges(_ valueSent: [String])
}
class LanguageSelectionTVC: UITableViewController {
var delegate : LanguageSelectionTVCProtocol? = nil
func saveAndClose() {
self.delegate?.setSelectedLangauges(self.languagesSpokenArray)
dismiss()
}
}
class RegistrationVC: UIViewController,
UITableViewDelegate,
UITableViewDataSource,
LanguageSelectionTVCProtocol{
func setSelectedLangauges(_ valueSent: [String]){
self.showLanguagesSpoken(valueSent)
}
}
从RegistrationVC
移动到language选择TVC
。下面的tableView
方法位于myRegistrationVC
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let row = indexPath.row
let section = indexPath.section
let currentCell = tableView.cellForRow(at: indexPath) as! UITableViewCell
if section == 4 && row == 0 {
// The user has clicked on languages spoken cell
self.performSegue(withIdentifier: "LanguageSelectionTVC", sender: self)
}
}
您需要从
preparForSegue
访问language selection tvc
,以设置它的delegate
。因此覆盖注册VC
中的准备(发件人:)
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "LanguageSelectionTVC" {
let vc = segue.destination as! LanguageSelectionTVC
vc.delegate = self
}
}
您需要从preparForSegue
访问language selection tvc
,以设置它的delegate
。因此覆盖注册VC
中的准备(发件人:)
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "LanguageSelectionTVC" {
let vc = segue.destination as! LanguageSelectionTVC
vc.delegate = self
}
}
您需要将RegistrationVC中的委托设置为LanguageSelectionTVC,例如,您可以在执行segue时进行设置:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let targetVC = segue.destination as! LanguageSelectionTVC
targetVC.delegate = self
}
您需要将RegistrationVC中的委托设置为LanguageSelectionTVC,例如,您可以在执行segue时进行设置:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let targetVC = segue.destination as! LanguageSelectionTVC
targetVC.delegate = self
}
您需要设置委托。请看下面两个视图控制器之间的数据传递示例
import UIKit
protocol SenderViewControllerDelegate
{
func messageData(str1:NSString)
}
class tableViewController: UIViewController, UITableViewDelegate,
UITableViewDataSource
{
var delegate: tableViewController?
override func viewDidLoad()
{
super.viewDidLoad()
self.delegate?.messageData(str1: “Hello world”)
}
}
在下面的控制器中接收数据
import UIKit
class HomeViewController: UIViewController ,SenderViewControllerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
let objtableview = tableViewController(nibName: "tableViewController",bundle: nil)
objtableview.delegate = self
self.navigationController?.pushViewController(objtableview, animated: true)
}
func messageData(str1:NSString){
print(str1)
}
}
您需要设置委托。请看下面两个视图控制器之间的数据传递示例
import UIKit
protocol SenderViewControllerDelegate
{
func messageData(str1:NSString)
}
class tableViewController: UIViewController, UITableViewDelegate,
UITableViewDataSource
{
var delegate: tableViewController?
override func viewDidLoad()
{
super.viewDidLoad()
self.delegate?.messageData(str1: “Hello world”)
}
}
在下面的控制器中接收数据
import UIKit
class HomeViewController: UIViewController ,SenderViewControllerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
let objtableview = tableViewController(nibName: "tableViewController",bundle: nil)
objtableview.delegate = self
self.navigationController?.pushViewController(objtableview, animated: true)
}
func messageData(str1:NSString){
print(str1)
}
}
您设置代理的位置显示您如何从RegistrationVC
移动到LanguageSelectionTVC
,您必须将代理设置在某个位置。@NiravD更新了我的问题,显示我如何从RegistrationVC
移动到LanguageSelectionTVC
@user44776检查我下面的解决方案,在哪里设置代理代理显示您如何从RegistrationVC
移动到LanguageSelectionTVC
您必须将代理设置在某个位置。@NiravD更新了我的问题,以显示我如何从RegistrationVC
移动到LanguageSelectionTVC
@user44776查看我的下面solution@user44776欢迎伴侣:)@user44776欢迎伴侣:)