perform segue from UIView

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.