perform segue from UIView - ios

Question

I have ViewController and there is UIView in it.
This UIView has separate class myView and there are many UI elements - one of them is CollectionView.
What I want is to perform segue when one of collection elements in myView is selected. But when I try to add line
performSegue(withIdentifier: "myIdintifier", sender: self)
to collection's view didSelectItemAt method I get error
Use of unresolved identifier 'performSegue'
And I understand that this is because I do it inside class that extends UIView and not UIViewController.
So how can I perfrom segue in this case? And also how can I prepare for segue?

Answer 1

Here I am going to evaluate it in step by step manner.
Step - 1
Create custom delegate using protocol as below snippet will guide you on your custom UIView. protocol must exist out of your custom view scope.
protocol CellTapped: class {
/// Method
func cellGotTapped(indexOfCell: Int)
}
Don't forgot to create delegate variable of above class as below on your custom view
var delegate: CellTapped!
Go with your collection view didSelect method as below
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if(delegate != nil) {
self.delegate.cellGotTapped(indexOfCell: indexPath.item)
}
}
Step - 2
Let's come to the your view controller. give the CellTapped to your viewcontroller.
class ViewController: UIViewController,CellTapped {
#IBOutlet weak var myView: MyUIView! //Here is your custom view outlet
override func viewDidLoad() {
super.viewDidLoad()
myView.delegate = self //Assign delegate to self
}
// Here you will get the event while you tapped the cell. inside it you can perform your performSegue method.
func cellGotTapped(indexOfCell: Int) {
print("Tapped cell is \(indexOfCell)")
}
}
Hope this will help you.

Answer 2

You can achieve using protocols/delegates.
// At your CustomView
protocol CustomViewProtocol {
// protocol definition goes here
func didClickBtn()
}
var delegate:CustomViewProtocol
#IBAction func buttonClick(sender: UIButton) {
delegate.didClickBtn()
}
//At your target Controller
public class YourViewController: UIViewController,CustomViewProtocol
let customView = CustomView()
customView.delegate = self
func didClickSubmit() {
// Perform your segue here
}

Answer 3

Other than defining protocol, you can also use Notification.
First, extent nonfiction.name:
extension Notification.Name {
static let yourNotificationName = Notification.Name(“yourNotificationName”)
}
Then right where you want to perform segue but can’t in your custom UIView:
NotificationCenter.default.post(name: .yourNotificationName, object: self)
Finally, you can listen to the notification in your viewControllers:
private var observer: NSObjectProtocol?
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
observer = NotificationCenter.default.addObserver(forName: .yourNotificationName, object: nil, queue: nil) {notification in
self.performSegue(withIdentifier:”your segue”, sender: notification.object}
Don’t forget to remove it:
override func viewWillDisappear(_ animated: Bool){
super.viewWillDisappear(animated)
NotificationCenter.default.removeObserver(observer)
}