Transfer cell text when selected to uitextfield in a different tableview controller - Swift

Question

I'm trying to figure out how I can take the current text in the cell that is selected and use it in a uitextfield when I segue to another tableview controller.

Here's my code

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

    let storyboard = UIStoryboard(name: "Main", bundle: nil)




    let controller = storyboard.instantiateViewControllerWithIdentifier("addPRTableViewController") as! addPRTableViewController


    self.navigationController?.pushViewController(controller, animated: true)
}

That's the segue.

Here's my array which if it is cell [0] that is selected I'd like it to fill the uitextfield txtPR with the string.

var abExercises = ["Ab Roller", "Crunches", "Flat Lying Bench Raise", "Leg Raises", "Russian Twist", "Weighted Crunch"]

Updated Code

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
{
    if segue.identifier == "YourSegue"
    {
        let nextScene = segue.destinationViewController as! addPRTableViewController

        if let indexPath = abTable.indexPathForSelectedRow
        {
            let exercise = abExercises[indexPath.row]
            nextScene.txtPR.text = exercise
        }
    }
}

Destination tableview controller (addPRTableViewController)

import UIKit

class addPRTableViewController: UITableViewController, UITextFieldDelegate {

@IBOutlet var txtPR: UITextField!
@IBOutlet var txtDesc: UITextField!

@IBOutlet weak var txtWeight: UITextField!




override func viewDidLoad() {
    super.viewDidLoad()
    tableView.tableFooterView = UIView()
    txtPR.delegate = self



}







// MARK: - Table view data source

override func numberOfSectionsInTableView(tableView: UITableView) -> Int {

    // #warning Incomplete implementation, return the number of sections

    return 1
}

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

    // #warning Incomplete implementation, return the number of rows

    return 5
}


func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange,
               replacementString string: String) -> Bool
{
    let maxLength = 25
    let currentString: NSString = textField.text!
    let newString: NSString =
        currentString.stringByReplacingCharactersInRange(range, withString: string)
    return newString.length <= maxLength
}






//Button Clicked
@IBAction func btnAddTask(sender : UIBarButtonItem){
    if (txtPR.text == ""){
        //Task Title is blank, do not add a record
    } else {
        //add record
        let name: String = txtPR.text!
        let description: String = txtDesc.text!
        let weight: String = txtWeight.text!
        taskMgr.addTask(name, desc: description, weight: weight)

        //dismiss keyboard and reset fields

        self.view.endEditing(true)
        txtPR.text = nil
        txtDesc.text = nil
        txtWeight.text = nil

    }
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    self.view.endEditing(true)
}


func textFieldShouldReturn(textField: UITextField) -> Bool{
    textField.resignFirstResponder()
    return true
}

override func tableView(tableView: UITableView, willDisplayHeaderView view: UIView, forSection section: Int) {
    let header: UITableViewHeaderFooterView = view as! UITableViewHeaderFooterView //recast your view as a UITableViewHeaderFooterView
    header.textLabel!.textColor = UIColor(red: 246/255, green: 75/255, blue: 55/255, alpha: 1.0)  //make the text white
}

}

Answer 1

You should look at initiating your segue through the prepareForSegue method. You would need to create a variable in the destination viewController to hold the data passed to it.

Set up a segue from the UITableViewCell to the destination view controller and give the segue an appropriate identifier.

The use the following method to pass the data when the segue is called by tapping the cell.

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
{
    if segue.identifier == "yourSegueName"
    {
        let nextScene = segue.destinationViewController as! NameOfYourViewController

        if let indexPath = yourTableOutlet.indexPathForSelectedRow
        {
           let exercise = abExercises[indexPath.row]
           nextScene.variableCreatedAtDestination = exercise
        }
     }
}

You then do not need to call the segue in didSelectRowAtIndexPath

Update

Ok, create a variable in addPRTableViewController called var prexercise = String() . In the original viewcontroller, in the prepareForSegue , change nextScene.txtPR.text = exercise to nextScene.prexercise = exercise .

In the addPRTableViewController, in the viewDidLoad (or whenever you want the data to appear), set this textPR.text = prexercise . Let me know how that works out for you.

Answer 2

Instead of setting the text directly, you should use a variable to store the data that you want to set to the text field. And then in your viewDidLoad() func set the text using that variable. Here is an example:

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
{
    if segue.identifier == "YourSegue"
    {
        let nextScene = segue.destinationViewController as! addPRTableViewController

        if let indexPath = abTable.indexPathForSelectedRow
        {
            let exercise = abExercises[indexPath.row]
            nextScene.txt = exercise
            }
        }
    }

Destination tableview controller (addPRTableViewController)

class addPRTableViewController: UITableViewController, UITextFieldDelegate {

@IBOutlet var txtPR: UITextField!
@IBOutlet var txtDesc: UITextField!

@IBOutlet weak var txtWeight: UITextField!

var txt:String = ""

    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.tableFooterView = UIView()
        txtPR.delegate = self
        txtPR.text = txt
    }

Hope this helps. :)