I've spent ages trying to solve this but with no resolve.
I've finally got to a point where I am pulling my data from one one controller and moving it to the destination controller when I unwind segue, however, when the variable is only reloading in the println
but not in the tableview.
I'll try to explain this a bit better with my code as it sounds complicated.
I have a label on one controller which when pressed, presents a UISearchController
modally. when you select a cell, it dismisses the view with an unwind segue and passes the data from the cell back to the previous controller to change the label of the button.
I set the label.text in a variable at the top of the initial controller like so var selectedStation = "Search Stations"
here is my shoddy named function which is used to println
the variable to see if it works which it does:
func updateStuff() {
println("you selected \(selectedStation)")
tableView.reloadData()
}
and i declare the label text in my cellForRowAtIndexPath
like so:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("searchFieldCell", forIndexPath: indexPath) as! searchFieldTableViewCell
cell.backgroundView = UIImageView(image: UIImage(named: "red-full"))
cell.destinationLabel.text = selectedStation
}
then in my UISearchController
i have the following to pass that variable back
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
println(stationArray[indexPath.row])
selectedStation = stationArray[indexPath.row]
self.performSegueWithIdentifier("unwindToSet", sender: self)
}
func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.destinationViewController .isKindOfClass(SetAlertController) {
var VC = segue.destinationViewController as! SetAlertController
VC.selectedStation = self.selectedStation
VC.updateStuff()
}
}
essentially my controller retrieves the updated variable but doesn't update it in the tableview, it only updates it in the println.
i set up a quick demo project with the following viewcontrollers:
class MainViewController: UIViewController {
@IBOutlet weak var label: UILabel!
@IBAction func unwind(segue: UIStoryboardSegue) {
println("unwinding")
if let sourceViewController = segue.sourceViewController as? ModalViewController {
label.text = sourceViewController.selectedText
}
}
}
tapping on the label results in the modalviewcontroller to show. i set this up in storyboard.
class ModalViewController: UITableViewController {
var selectedText: String?
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let cell = tableView.cellForRowAtIndexPath(indexPath)!
selectedText = cell.textLabel?.text
performSegueWithIdentifier("unwindToSet", sender: self)
}
}
everything works as expected! feel free to ask if anything is unclear... you can find the demo project here: https://www.dropbox.com/sh/u2blzmo3ztaaini/AADq8hOMMS71wvBH1eH4Bz_4a?dl=0
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