将数据从静态 tableViewCell 传递到另一个 viewController？

Question

I have a tableView with static cells.

What I wan't, is that when the user selects a certain cell, the text from this cell, is passed to the previous viewController. I have never worked with static cells before and I can only seem to find tutorials and other questions regarding activating the cells, so they leed to another viewController.

So how do I pass data (what's written in the cell), when the cell is selected?

Is it a code in didSelectRowAtIndexPath?

Do I use segues? Then there will have to be hundreds of segues, if I have hundreds of cell, that the user can choose, right?

Thanks!

Answer 1

Text label is of type String. You are assigning an array of string to it. Also the same mistake you are doing with assigning indexPath to an array of Strings. You are messing around with types.

Change to this:

vc?.chosenQuestion = tableView.cellForRow(at: selectedRowIndex).textLabel?.text

Change your variable to

var chosenQuestion = ""

And in viewDidLoad()

DiaryQuestionLabel.text = chosenQuestion

Answer 2

You are attempting to assign the wrong type to your variables. That is the cause of your errors.
For example,
You have defined chosenQuestion as an array of String values, ie [String] , but you are attempting to assign an IndexPath at the following statement, vc?.chosenQuestion = selectedRowIndex .

To fix your problem,
You need to extract the specific string from your data source by utilising the IndexPath that you have stored into the selectedRowIndex variable.

For example, If your data source array is called, myArray , you can do the following:

var selectedRowIndex = self.tableView.indexPathForSelectedRow
vc?.chosenQuestion = myArray[selectedRowIndex]

and then change your variable,
var chosenQuestion = ""

Finally, inside viewDidLoad() :
DiaryQuestionLabel.text = chosenQuestion

Answer 3

First you are assigning Array of String to DiaryQuestionLabel.text which accepts string only in destinationViewController. Just change the type of chosenQuestion to String in destinationViewController as below.

@IBOutlet weak var DiaryQuestionLabel: UILabel!
var chosenQuestion: String = ""

override func viewDidLoad() {
   super.viewDidLoad()
   DiaryQuestionLabel.text = chosenQuestion
}

In your tableViewController You need to pass the value of selected index from your datasource array which you have used to set the data in your tableviewcell.

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
     if segue.destination is UpdatingIdentifiers {
     let vc = segue.destination as? UpdatingIdentifiers
     let selectedRowIndex = self.tableView.indexPathForSelectedRow()
     // Get tableviewcell object from indexpath and assign it's value to chosenQuestion of another controller.  
     let cell = yourtableview.cellForRow(at: selectedRowIndex)
     let label = cell.viewWithTag(420) as! UILabel
     vc?.chosenQuestion = label.text
    }
}

Answer 4

How about a simple way. This is similar to Ali_Habeeb's answer with more details.

In your didSelectRowAt :

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let question = yourDataArray[indexPath.row]
    let storyboard = UIStoryboard(name: "StoryboardName", bundle: nil)
    let newVC = storyboard.instantiateViewController(withIdentifier: "newVCIdentifier") as! NewViewController
    newVC.choosenQuestion = question
    self.show(newVC, sender: self)
}

In your newVC:

class NewViewController: UIViewController {

  @IBOutlet weak var DiaryQuestionLabel: UILabel!

  var choosenQuestion = ""

  override func viewDidLoad() {
     super.viewDidLoad()
     DiaryQuestionLabel.text = choosenQuestion
  }
}

This is a very simple format, and should not produce any error and if does, then check your dataArray.