Navigate to ViewController from #IBDesignable UIView didSelectRowAt UITableView - swift

Question

I have created a #IBDesignable View file and implemented tableview in it. Data is coming and tableView in working but only I am facing issue at the time of select cell which has to open to other ViewController. Because its a #IBDesignable view file, not a viewController.swift
How to navigate to viewController from #IBDesignable UIView tableview cell select with passing values?
Error: has no member 'navigationController' if I use self.
Code:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let actionType = AppData?.items?[indexPath.row].actionType
switch actionType {
case 5:
print(actionType ?? 0)
let urlLink = AppData?.items?[indexPath.row].actionUrl
let titleText = AppData?.items?[indexPath.row].textValue
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
let vc = storyboard.instantiateViewController(withIdentifier: "WebViewController") as! WebViewController
vc.url = urlLink ?? ""
vc.titleText = titleText ?? ""
self.navigationController.pushViewController(vc, animated: true)
default:
print(actionType ?? 0)
}
}

Answer 1

You can access the parent view controller using this extension:
extension UIView {
var viewController: UIViewController? {
var responder: UIResponder? = self
while responder != nil {
if let responder = responder as? UIViewController {
return responder
}
responder = responder?.next
}
return nil
}
}
You can use it like this in your code:
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
let vc = storyboard.instantiateViewController(withIdentifier: "WebViewController") as! WebViewController
vc.url = urlLink ?? ""
vc.titleText = titleText ?? ""
self.viewcontroller?.navigationController?.pushViewController(vc, animated: true)
Note: Although you can get the parent controller of UIView, it is not
recommended as the UIView should not be aware of the controller. I
suggest using Delegates.

Answer 2

Your UITableView is a UIView so it's not a UIViewController and has not UINavigationController.
You should create a delegate in your UITableView that will be implemented by your UIViewController.
Something like that :
protocol MyTableViewDelegate: class {
func didSelectRow(url: String, titleText: String)
}
Add a delegate variable in your table view like :
weak var delegate: MyTableViewDelegate?
and call your delegate like this :
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let actionType = AppData?.items?[indexPath.row].actionType
switch actionType {
case 5:
print(actionType ?? 0)
let urlLink = AppData?.items?[indexPath.row].actionUrl
let titleText = AppData?.items?[indexPath.row].textValue
self.delegate.didSelectRow(url: url, titleText: titleText)
default:
print(actionType ?? 0)
}
}
In your view controller :
you should add your table view custom class into your ViewController,
then add delegate : yourTableView.delegate = self
implement delegate :
extension MyViewController: MyTableViewDelegate {
func didSelectRow(url: String, titleText: String) {
let vc = storyboard.instantiateViewController(withIdentifier: "WebViewController") as! WebViewController
vc.url = urlLink
vc.titleText = titleText
self.navigationController.pushViewController(vc, animated: true)
}
}