I'm having trouble passing data after selecting a table view cell to the previous view controller. I'm pretty much trying to change a label from the previous view controller after selecting a table view cell. Could anyone help me go about this? I'm trying to change the UITextField after selecting a cell.
UIViewController:
class WhoToOdds: UIViewController, sendBack,UITextFieldDelegate{
@IBOutlet var chosenContact: UITextField!
@IBOutlet var oddsTextBox: UITextView!
var friend: String?
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
navigationController?.setNavigationBarHidden(false, animated: true)
}
func sendNameToPreviousVC(selectedfriendName: String) {
friend = selectedfriendName
chosenContact.text = friend
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "friendList"{
let friendViewController = (segue.destinationViewController as! friendListController)
var fbRequest = FBSDKGraphRequest(graphPath:"/me/friends", parameters: nil);
fbRequest.startWithCompletionHandler { (connection : FBSDKGraphRequestConnection!, result : AnyObject!, error : NSError!) -> Void in
if error == nil {
println("Friends are : \(result)")
PFUser.currentUser()?["friend_list"] = result
PFUser.currentUser()?.save()
print(result)
var resultdict = result as! NSDictionary
println("Result Dict: \(resultdict)")
friendViewController.friendArray = resultdict.objectForKey("data") as! NSArray
} }
}
}
@IBAction private func submitChallenge(sender: AnyObject) {
navigationController?.popViewControllerAnimated(true)
}
}
TableViewController:
protocol sendBack
{
func sendNameToPreviousVC(contact: String)
}
class friendListController: UITableViewController, UITableViewDataSource, UITableViewDelegate{
var friendArray:NSArray = ["a","b","c"]
var valueDict:NSDictionary = [:]
var mDelegate:sendBack?
var selectedFriend :String?
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
navigationController?.setNavigationBarHidden(false, animated: true)
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return friendArray.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("friend", forIndexPath: indexPath) as! UITableViewCell
cell.textLabel!.text = (friendArray[indexPath.row] as! String)
return cell
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){
let indexPath = tableView.indexPathForSelectedRow();
let currentCell = tableView.cellForRowAtIndexPath(indexPath!) as UITableViewCell!
selectedFriend = currentCell.textLabel!.text as String!
sendBackFriendList(selectedFriend!)
navigationController?.popViewControllerAnimated(true)
}
func sendBackFriendList(name: String){
self.mDelegate?.sendNameToPreviousVC(name)
}
}
To pass data back, the most common approach is to create a delegate property in your detail view controller, like this: class ViewControllerB: UIViewController { var selectedName: String = "Anonymous" weak var delegate: ViewControllerA! }
Open your storyboard where your different viewController are located. Tap the viewController you would like your navigation controller to start from.
Your delegate needs to be set. In your case you have to set it inside prepareForSegue
method like
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "friendList"{
let friendViewController = (segue.destinationViewController as! friendListController)
friendViewController.mDelegate = self //Include this line
//rest of the code
}
}
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