Passing a Variable Through a Segue? Xcode 8 Swift 3

Pass data through segue

Swift works exactly the same way as Obj-C but is reworked in the new language. I don't have a lot of information from your post but let's give a name to each TableViewController to help with my explanation.

HomeTableViewController (this is the screenshot you have above)

PlayerTableViewController (this is the player screen you want to travel to)

With that said, in PlayerTableViewController you need to have a variable that will store the passed data. Just under your class declaration have something like this (if you intend to store the struct as a single object rather than the array:

class PlayerTableViewController: UITableViewController {

    var programVar : Program?

    //the rest of the class methods....

After that there are two ways you can send data to the new TableViewController.

1) Using prepareForSegue

At the bottom of HomeTableViewController you will use the prepareForSegue methods to pass the data. Here is an example of the code you'll use:

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

    // Create a variable that you want to send
    var newProgramVar = Program(category: "Some", name: "Text")

    // Create a new variable to store the instance of PlayerTableViewController 
    let destinationVC = segue.destinationViewController as PlayerTableViewController
    destinationVC.programVar = newProgramVar
    }
}

Once PlayerTableViewController has loaded the variable will be already set and usable

2) Using didSelectRowAtIndexPath

If specific data needs to be sent based on which cell is selected you can use didSelectRowAtIndexPath. For this to work, you need to give your segue a name in the storyboard view (let me know if you need to know how to do this too).

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

    // Create a variable that you want to send based on the destination view controller 
    // You can get a reference to the data by using indexPath shown below
    let selectedProgram = programy[indexPath.row]

    // Create an instance of PlayerTableViewController and pass the variable
    let destinationVC = PlayerTableViewController()
    destinationVC.programVar = selectedProgram

    // Let's assume that the segue name is called playerSegue
    // This will perform the segue and pre-load the variable for you to use
    destinationVC.performSegueWithIdentifier("playerSegue", sender: self)
}

Let me know if you need any other info on this

Swift 3 - Passing Data from one view to another

If your SearchViewController is the initial VC then why would you put a back button there? Where you want it to Go Back to? I think it should not be there.

Also unless you really need to do things programmatically in Xcode, you should just use Storyboard do embed the SearchViewController inside NavigationController (select the Controller then from menu: Editor-> Embed in -> Navigation Controller).

Then create segue from controller icon on the top of the SearchViewController to the ResultViewController and you could set identifier for the segue like you already knew (as you use it in your code).

In your ResultViewController, if you have did the steps I mentioned above, then you don't need button for returnToSearch and you could delete the @IBAction for btnReturnToSearch(_ sender: Any). As you will get the <Back button as Navigation Item on the top of ResultViewController to return to SearchVeiwController for free.

*** Update based on the last comment ****

Okay. I finally understood your issue. In your prepare(for:sender) . you need to . check the Segue Identifier:

if  segue.identifier  == "CHANGE_ME_WITH_YOUR_SEGUE_FOR_RESULT_IDENTIFIER"  {
 ...
}

before you pass down the search result to the . ResultViewController. As when you segue back, you are not going to the ResultViewController but the MainViewController.

Access a variable in another view controller - Xcode 8.0 Swift 3.0

You need to do

hello.whatever your variable name is = the new variable you created on VC2

after you declare the hello variable

hope this helps

override func viewDidAppear(_ animated: Bool) {
print("viewDidAppear")

func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    print("prepare for segue")

    let variableUnwind = ("StackOverFlow")

    if segue.identifier == "toFirstViewController"  {

        let hello = segue.destination as! AddItemViewController

hello.variableName = newVariableName

    }

}

}

How can I pass data from a VC to another in Swift 3 without a segue?

You can pass data with Navigation in Swift 3 like this: -

Current Class

 let editProfile = self.storyboard?.instantiateViewController(withIdentifier: "editProfile") as? EditProfileVc
        if detailsModel.count != 0 {
            editProfile?.accModel = detailsModel[0] //Passing data here with the array
        }
 self.navigationController?.pushViewController(editProfile!, animated: true)

and target class (here using model class variable)

    class EditProfileVc: BaseNotifyM, PickerDelegate {
    
        // Data Variable 
        var accModel:AccountModel? //-- Here you can use [String] or [[String: Any]] or as per you choice for data passing 

      //MARK: - Life Cycle
       override func viewDidLoad() {
        super.viewDidLoad()

        //Do some thing with your data
        print(accModel)
      }

   }

Swift 3 - Passing data between a View Controller and after that to another 2

Before calling presentViewController add :

nextViewController.name = yourTextField.text

You could also delete the segue call. That is redundant.

Here is an example that I've used in the past :

    @IBAction func doSegue(_ sender: UIButton) {
        buttonTag = sender.tag

        let storyboard = UIStoryboard (name: "Main", bundle: nil)
        let resultVC = storyboard.instantiateViewController(withIdentifier: "ResultViewController")as! ResultViewController

        // Communicate with new VC - These values are stored in the destination
        // you can set any value stored in the destination VC here
        resultVC.firstValue = buttonTag
        resultVC.secondValue = randomOpponentValue()
        self.navigationController?.pushViewController(resultVC, animated: true)
    }