执行Segue - TableViewCell.xib到UIView - 和 - TableView.xib到UIViewController -

Question

How can I perform segue from one .xib (TableCell.xib) to another .xib(UIViewController) on click on TableCell?

  override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        print(results?[indexPath.row])  // prints successfully
      ... 
      // apply below chunks here...
  }

First, I tried setting up a manual segue in Storyboard. Note that, TableView & TableViewCell are external xib but parent of TableView is in Storyboard. So, I tried control-dragging from parent-ViewController to the detailViewController (and identifier: showDetails)..However, doesn't work.

      ...
        NSOperationQueue.mainQueue().addOperationWithBlock({ () -> Void in
            self.performSegueWithIdentifier("showDetails", sender: AnyObject?())
        })
      ...

Obviously, I received this error (because TableView is in .xib whereas parent and detailsVC are in Storyboard and I ctrl+dragged from parentVC to detailsVC but TableView1 apparently doesn't recognise the segue in Main Storyboard):

TableView1: 0x7f97626a3280>) has no segue with identifier 'showDetails''

---

Then I tried creating a ViewController and tried adding var parentNavigationController : UINavigationController! at the top and referencing below chunk inside didSelectRowAtIndex

   ...
     let newVC : UIViewController = CellDetailsVC()
     newVC.title = "DetailsView"
     print(newVC)

     parentNavigationController!.pushViewController(newVC, animated: true)

However, I am receiving an error:

DetailsVC: 0x7ff7794ae550> fatal error: unexpectedly found nil while unwrapping an Optional value

---

Finally, I also tried below chunk inside didSelectRowAtIndex , and got something close (as I can use dismissView to < Back ); but not exactly what I want. Its problem is that the segue animation looks like the page is coming from bottom.

   ...
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let vc = storyboard.instantiateViewControllerWithIdentifier("VideoDetailsVC") as UIViewController
    self.presentViewController(vc, animated: true, completion: nil)
 }

I am also receiving a warning (but not crash) for some reason I couldn't figure out:

Presenting view controllers on detached view controllers is discouraged

---

• Which approach is the right one? Or is there a better way to adapt to achieve what I am trying to?

• Firstly, what is the right way to perform segue from didSelectRowAtIndex (in TableView.xib class) to a new ViewController (either Storyboard or xib)?

• Secondly, assume that there is an image thumbnail in the TableViewCell.xib . What is right way of performing segue to a new UIView on click on that view? (like full-screen image / dismiss-able)

Answer 1

Your second approach looks to be right one but of course you are doing something wrong there. You need to drag and drop Segue from Parent ViewController to Detail ViewController and give it a Segue identifier in Storyboard (check attached Image below). IN didSelectRowAtIndexPath you need to do below code:

    self.performSegueWithIdentifier("showDetailViewController", sender: nil)

As I can see you already tried that but it looks like you missed some step either setting Segue Identifier or giving wrong identifier in performSegueWithIdentifier method. Also your Parent ViewController should be embedded in UINavigationController in case you are missing that thing :)

Also keep in mind you should perform navigation (here its Segue) from one ViewController to another ViewController at same level not from one View to another ViewController.