如何从ViewController选择（推送）到NavigationController中嵌入的另一个ViewController？

Question

I have a tableView in a viewController and when I tap on a cell a push segue is performed to a navigation controller that is embedded in another viewController. In the swift file for the first VC I have prepareForSegue function firing when a cell is tapped and in that function I pass some info to a textView that is in the second viewController.

But when I run my app I get an error when I tap on a cell because I cast the destination VC as the second VC not the navigationController. But if I cast it as the navigationController instead, then the segue works but I cannot pass the info from the first VC to the textView in the second VC. Am I missing something here?

Answer 1

You should reach the Navigation Controller and get the topViewController from stack. This code snippet should be work.

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

            if segue.identifier == "yourSegueIdentifierIsHere" {

                    let destinationVC = segue.destinationViewController.navigationController?.topViewController as? YourClass
                    destinationVC. // do something.


            }
        }

Second question answer is :

You can get the indexPath like this;

let indexPath = tableView.indexPathForSelectedRow

and you can use yourArray[indexPath.row]

Third question answer is;

You can not directly set your textView.text in your prepareForSegue method. You should create a variable in your destionationViewController and you can send the data to this variable. Create a variable in your destionationViewController like this;

var journalText: String = ""

and now send the data in your prepareForSegue method.

destinationVC.journalText = "Some string"