I am new in programming, and have problem. I am using parse for my array in tableview. When the row is selected i want to segue on another view controller to textView. The tableview works good but i can't get text to textView.
tableVC:
import UIKit
import Parse
class ThirdTableVC: UITableViewController {
#IBOutlet weak var refresherQuotes: UIRefreshControl!
#IBOutlet var quoteTable: UITableView!
var selectedQuote: PFObject?
var quoteItems = [PFObject]()
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func updateQuotesResults(_ sender: UIRefreshControl) {
fetchQuotesData()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
loadQuoteTexts(selectedQuote: selectedQuote)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return quoteItems.count
}
func fetchQuotesData() {
let quotesQuery = PFQuery(className: "TotalTest")
quotesQuery.whereKey("Subcategory", equalTo: selectedQuote ?? nil)
quotesQuery.findObjectsInBackground { (objects, error) in
if let realCategoryObjects = objects {
self.quoteItems = realCategoryObjects
self.tableView.reloadData()
self.refresherQuotes.endRefreshing()
}
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let quoteCell = tableView.dequeueReusableCell(withIdentifier: "quoteCell", for: indexPath)
let quoteItem = quoteItems[indexPath.row]
let quoteUserTitle = quoteItem.object(forKey: "TextQuote") as? String
quoteCell.textLabel?.text = quoteUserTitle
return quoteCell
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "showQuoteDetail" {
if let indexPath = tableView.indexPathForSelectedRow {
let quoteobject = quoteItems[indexPath.row] as? NSDate
let quoteController = (segue.destination as! UINavigationController).topViewController as! DetailViewController
quoteController.detailItem = quoteobject
quoteController.navigationItem.leftBarButtonItem = splitViewController?.displayModeButtonItem
quoteController.navigationItem.leftItemsSupplementBackButton = true
}
}
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("Row tapped: \(indexPath.row)")
let selectedQuotes: PFObject = quoteItems[indexPath.row]
let FourthVC = self.storyboard?.instantiateViewController(withIdentifier: "FourthViewController") as! FourthViewController
FourthVC.fourthTextView.text = quoteItems[indexPath.row] as? String
self.navigationController?.pushViewController(FourthVC, animated: true)
}
func loadQuoteTexts(selectedQuote: PFObject!) {
let quoteQuery = PFQuery(className: "TotalQuote")
quoteQuery.whereKey("QuoteSubs", equalTo: selectedQuote ?? nil)
quoteQuery.includeKey("QuoteSubs")
quoteQuery.findObjectsInBackground { (result: [PFObject]?, error) in
if let searchQuoteResults = result {
self.quoteItems = searchQuoteResults
self.quoteTable.reloadData()
}
}
}
}
How can I change this?
viewController with textView:
import UIKit
import Parse
class FourthViewController: UIViewController {
var getQuote: PFObject?
#IBOutlet weak var fourthTextView: UITextView!
#IBOutlet weak var fourthLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
fourthLabel.text! = getQuote as! String
fourthTextView.text! = getQuote as! String
}
}
Please help me to passing texts
If you use pushViewController do it like that , in did selectRowAt
let MainStory: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let desVC = MainStory.instantiateViewController(withIdentifier: "FourthViewController") as! FourthViewController
and now pass your text
desVC.getText = "here goes your text u want to pass"
FourthViewController
set up your var
var getText = String()
so you can finally use
self.navigationController?.pushViewController(desVC, animated: true)
so it will pass all parameters you previous add with desVC.getSomething
in FourthViewController you just need to use getText.
The problem is that you are changing from a view to another with pushViewController, by doing that your prepareForSegue won't be executed.
On your didSelectRow you need to call performSegue(withIdentifier:sender:).
You can lookup this question for more information on how to do it.
Related
Ive been stuck trying to pass data from the FoodEatenController(FEC) Footer to the TotalCaloriesController. The code that I have now it shows NOTHING in the calorieLbl of the TotalCalorieController(TCC).
The delegate that ive been using to pass the data from the FEC to the TCC does not pass the text/string data that is in the FoodFooter calorieTotallbl to the TEC calorieLbl
the data that populates the cells of the FEC is retrieved from Cloud Firestore and passed in from anotherView Controller (FoodPickerController)
import UIKit
class FoodEatenController: UIViewController{
var selectedFood: FoodList! // allows data to be passed into the VC
// allows data to be sepearted into sections
var foodItems: [FoodItem] = []
var groupedFoodItems: [String: [FoodItem]] = [:]
var dateSectionTitle: [String] = []
#IBOutlet weak var tableView: UITableView!
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let vc = segue.destination as? TotalCalorieController {
}
}
}
extension FoodEatenController: UITableViewDelegate, UITableViewDataSource{
func numberOfSections(in tableView: UITableView) -> Int {
return dateSectionTitle.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let date = dateSectionTitle[section]
return groupedFoodItems[date]!.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let foodCell = tableView.dequeueReusableCell(withIdentifier: "FoodCell") as! FoodCell
let date = dateSectionTitle[indexPath.section]
let foodItemsToDisplay = groupedFoodItems[date]![indexPath.row]
foodCell.configure(withCartItems: fooditemsToDisplay.foodList)
return foodCell
}
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let foodHeader = tableView.dequeueReusableCell(withIdentifier: "FoodHeader") as! FoodHeader
let headerTitle = dateSectionTitle[section]
foodHeader.dateLbl.text = "Date: \(headerTitle)"
return foodHeader
}
func tableView(_ tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
let foodFooter = tableView.dequeueReusableCell(withIdentifier: "FoodFooter") as! FoodFooter
let date = dateSectionTitle[section]
let arrAllItems = groupedFoodItems[date]!
var total: Float = 0
for item in arrAllItems {
let eaten = item.productList
let selectedMeal = item.foodList.selectedOption
if selectedMeal == 1 {
total = total + (Float(eaten!.calorie))
}
}
foodFooter.calorieTotal.text = String(subtotal!)
foodFooter.delegate = self
return foodFooter
}
}
extension FoodEatenController: EatenFoodDelegate {
func onTouchCaloireInfo(info: String) {
let popUp = self.storyboard?.instantiateViewController(withIdentifier: "AdditionalCostsVC") as! TotalCalorieController
popUp.calorieLbl.text = info
}
}
import UIKit
protocol EatenFoodDelegate: class {
func onTouchCaloireInfo(info: String)
}
class FoodFooter: UITableViewCell {
weak var delegate: EatenFoodDelegate? = nil
#IBOutlet weak var calorieTotal: UILabel!
#IBOutlet weak var totalInfoBtn: UIButton!
#IBAction func totalOnClicked(_ sender: AnyObject) {
self.delegate?. onTouchCaloireInfo(info: calorieTotal.text!)
}
}
class TotalCalorieController: UIViewController, EatenFoodDelegate {
func onTouchCaloireInfo(info: String) {
calorieLbl.text = info
}
#IBOutlet weak var calorieLbl: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func returnButton(_ sender: Any) {
dismiss(animated: true, completion: nil)
print("Close Taxes and Fees")
}
}
Add the following line at the end of the func onTouchCaloireInfo(info:)
self.present(popUp, animated: true, completion: nil)
If you would like to be sure that the function onTouchCaloireInfo(info:) gets called, just add the following line:
debugPrint("onTouchCaloireInfo")
And check, if it prints the given string in the console of the Xcode
extension FoodEatenController: EatenFoodDelegate {
func onTouchCaloireInfo(info: String) {
debugPrint("onTouchCaloireInfo")
let popUp = self.storyboard?.instantiateViewController(withIdentifier: "AdditionalCostsVC") as! TotalCalorieController
self.present(popUp, animated: true) {
popUp.calorieLbl.text = info
}
}
}
I'm trying to do an app in which the data were obtained from JSON.
In the picture below you can see the project:
Project
If we click on the photo opens the details page. The problem is because I do not know how to pick up the data shown in the details page. Please help me.
Here is the code
import UIKit
import Alamofire
import AlamofireImage
import SwiftyJSON
class ViewController: UIViewController ,UITableViewDelegate,UITableViewDataSource,UISearchBarDelegate {
#IBOutlet weak var searchbarValue: UISearchBar!
weak open var delegate: UISearchBarDelegate?
#IBOutlet weak var tableView: UITableView!
var albumArray = [AnyObject]()
var url = ("https://jsonplaceholder.typicode.com/photos")
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.searchbarValue?.delegate = self
Alamofire.request("https://jsonplaceholder.typicode.com/photos").responseJSON { (responseData) -> Void in
if((responseData.result.value) != nil) {
let swiftyJsonVar = JSON(responseData.result.value!)
if let resData = swiftyJsonVar[].arrayObject {
self.albumArray = resData as [AnyObject]; ()
}
if self.albumArray.count > 0 {
self.tableView.reloadData()
}
}
}
}
public func searchBarTextDidEndEditing(_ searchBar: UISearchBar) // called when text ends editing
{
callAlamo(searchTerm: searchbarValue.text!)
}
func callAlamo(searchTerm: String)
{
Alamofire.request("https://jsonplaceholder.typicode.com/photos").responseJSON { (responseData) -> Void in
if((responseData.result.value) != nil) {
let swiftyJsonVar = JSON(responseData.result.value!)
if let resData = swiftyJsonVar[].arrayObject {
self.albumArray = resData as [AnyObject]; ()
}
if self.albumArray.count > 0 {
self.tableView.reloadData()
}
}
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return albumArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as? CostumTableViewCell
let title = albumArray[indexPath.row]
cell?.titleLabel?.text = title["title"] as? String
//cell?.url?.image = UIImage(data: title as! Data)
let imageUrl = title["thumbnailUrl"] as? String
//print(imageUrl)
let urlRequest = URLRequest(url: URL(string: imageUrl!)!)
Alamofire.request(urlRequest).responseImage { response in
if let image = response.result.value {
// print("image downloaded: \(title["url"])")
cell?.url?.image = image
}
}
return cell!
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "showDetails", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let indexPath = self.tableView.indexPathForSelectedRow?.row
let vc = segue.destination as! DetailsViewController
//here should be the code
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Also you can see the DetailsViewController code:
import UIKit
class DetailsViewController: UIViewController {
var image2 = UIImage()
var title2 = String()
#IBOutlet var mainImageView: UIImageView!
#IBOutlet var songTitle: UILabel!
override func viewDidLoad() {
songTitle.text = title2
mainImageView.image = image2
}
}
You can easily pass value from tableview to detail view using the below code :
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let indexPath = self.tableView.indexPathForSelectedRow
let cell : CostumTableViewCell = self.tableView.cellForRow(at: indexPath!) as! CostumTableViewCell
let vc = segue.destination as! DetailsViewController
vc.image2 = cell.url.image!
vc.title2 = cell.titleLabel.text!
}
class ViewController: UIViewController ,UITableViewDelegate,UITableViewDataSource,UISearchBarDelegate {
var customArr = [CustomElement]()
var arr = [Any]()
// In viewDidLoad , you can append element to customArr
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
var image = customArr[indexpath.row].image
var title = customArr[indexpath.row].title
arr.append(image)
arr.append(title)
performSegue(withIdentifier: "showDetails", sender: arr)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let indexPath = self.tableView.indexPathForSelectedRow?.row
if segue.identifier = "showDetails" {
if let vc = segue.destination as! DetailsViewController {
vc.arr = sender
}
}
//here should be the code
}
}
class DetailsViewController: UIViewController {
var arr = [Any]()
}
I want to passing data with segue in the tableViewCell,from BulletinBoadrViewController to BbDetailViewController
class BulletinBoadrViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {
#IBOutlet weak var tableView: UITableView!
var bulletinBoards = [BulletinBoard]()
override func viewDidLoad() {
super.viewDidLoad()
bulletinBoards = BulletinBoard.downloadAllBulletinBoard()
self.tableView.reloadData()
tableView.estimatedRowHeight = tableView.rowHeight
tableView.rowHeight = UITableViewAutomaticDimension
tableView.separatorStyle = .none
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return bulletinBoards.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! BulletinBoardTableViewCell
let bulletinBoard = bulletinBoards[indexPath.row]
cell.bulletinBoard = bulletinBoard
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "gotodetail", sender: indexPath)
print("Row \(indexPath.row)selected")
}
func prepareForSegue(segue: UIStoryboardSegue, sender: Any!) {
if segue.identifier == "gotodetail" {
if let indexPath = self.tableView.indexPathForSelectedRow {
let destVC = segue.destination as! BdDeatilViewController
let new = bulletinBoards[indexPath.row]
destVC.bulletinBoard = new
}
}
}
and it's BdDeailViewController
class BdDeatilViewController:UIViewController {
#IBOutlet weak var titleLabel: UILabel!
#IBOutlet weak var timeLabel: UILabel!
#IBOutlet weak var contentLabel: UITextView!
#IBAction func backtobb(_ sender: UIButton) {
self.dismiss(animated: true, completion: nil)
}
var x = [BulletinBoard]()
var bulletinBoard : BulletinBoard!{
didSet{
self.updateUI()
}
}
func updateUI() {
timeLabel.text = bulletinBoard.time
titleLabel.text = bulletinBoard.title
contentLabel.text = bulletinBoard.content
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
}
}
and tableViewCell's data is taking from local json file, it's BulletinBoard code
class BulletinBoard {
var title:String?
var time:String?
var content:String?
init(title:String,time:String,content:String) {
self.title = title
self.time = time
self.content = content
}
init(bulletinBoardDictionary:[String:Any]) {
self.title = bulletinBoardDictionary["title"] as? String
self.time = bulletinBoardDictionary["time"] as? String
self.content = bulletinBoardDictionary["content"] as? String
}
static func downloadAllBulletinBoard() -> [BulletinBoard] {
var bulletinBoards = [BulletinBoard]()
//get the json data from the file
let jsonFile = Bundle.main.path(forResource: "BulletinBoardData", ofType: "json")
let jsonFileURL = URL(fileURLWithPath: jsonFile!)
let jsonData = try? Data(contentsOf: jsonFileURL)
//turn the json data into foundation objects (bulletinBoards)
if let jsonDictionary = NetworkService.parseJSONFromData(jsonData) {
let bulletinBoardDictionaries = jsonDictionary["BulletinBoard"] as! [[String:Any]]
for bulletinBoardDictionary in bulletinBoardDictionaries {
let newBulletinBoard = BulletinBoard(bulletinBoardDictionary: bulletinBoardDictionary)
bulletinBoards.append(newBulletinBoard)
}
}
return bulletinBoards
}
}
Finally,it's my StoryBoard
https://i.stack.imgur.com/JcgdH.png1
Can anyone solve my problem?Thanks!
I think you should retrieve indexPath from sender in prepareForSegue:
override func prepareForSegue(segue: UIStoryboardSegue, sender: Any!) {
if segue.identifier == "gotodetail" {
if let indexPath = sender as? IndexPath {
let destVC = segue.destination as! BdDeatilViewController
let new = bulletinBoards[indexPath.row]
destVC.bulletinBoard = new
}
}
}
and update the UI in the viewDidLoad:
override func viewDidLoad() {
super.viewDidLoad()
self.updateUI()
}
I am struggling with getting my care data to populate my second tableview controller. The data is populating the first tableview and I can select a row and the segue is used to go to the second table but the labels are not populated.
I've looked all over and have found older samples or obj-c but I cannot figure it out, so any help pointing this n00b in the right direction will be helpful.
Here is what I have, I think I am missing how to populate a variable to pass in prepareForSegue in the list tableview, but I could be wrong. I get a warning error in that function (Warning cannot assign value of type 'ListEntity' to type '[ListEntity]').
CoreData
Entity = ListEntity
Attributes = title, event & location (all as Strings)
listTableViewController
import UIKit
import CoreData
class ListTableViewController: UITableViewController {
let managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
var lists = [ListEntity]()
override func viewDidLoad() {
super.viewDidLoad()
self.title = "The List"
let addButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Add, target: self, action: #selector(ListTableViewController.addButtonMethod))
navigationItem.rightBarButtonItem = addButton
}
func addButtonMethod() {
print("Perform action")
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
reloadData()
tableView.reloadData()
}
func reloadData() {
let fetchRequest = NSFetchRequest(entityName: "ListEntity")
do {
if let results = try managedObjectContext.executeFetchRequest(fetchRequest) as? [ListEntity] {
lists = results
}
} catch {
fatalError("There was an error fetching the list!")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
// MARK: - Table view data source
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return lists.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("ListCell") as! ListTableViewCell
let list = lists[indexPath.row]
cell.configurationWithSetup(list)
return cell
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
performSegueWithIdentifier("DetailsSegue", sender: self)
tableView.deselectRowAtIndexPath(indexPath, animated: true)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "DetailsSegue" {
let destinationVC = segue.destinationViewController as! DetailsTableViewController
let indexPath : NSIndexPath = self.tableView.indexPathForSelectedRow!
print(indexPath.row) // Print the Row selected to console
// Place the code to pass data here?
// destinationVC.lists = lists[indexPath.row]
// Warning cannot assign value of type 'ListEntity' to type '[ListEntity]'
}
}
}
listTableViewCell
import UIKit
class ListTableViewCell: UITableViewCell {
#IBOutlet weak var titleLabel: UILabel!
func configurationWithSetup(list: AnyObject) {
titleLabel.text = list.valueForKey("title") as! String?
}
}
detailsTableViewController
import UIKit
import CoreData
class DetailsTableViewController: UITableViewController {
let managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
var lists = [ListEntity]()
override func viewDidLoad() {
super.viewDidLoad()
}
// MARK: - Table view data source
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("DataCell") as! DetailsTableViewCell
let list = lists[indexPath.row]
cell.configurationWithSetup(list)
return cell
}
}
detailsTableViewCell
import UIKit
import CoreData
class DetailsTableViewCell: UITableViewCell {
#IBOutlet weak var titleLabel: UILabel!
#IBOutlet weak var eventLabel: UILabel!
#IBOutlet weak var locationLabel: UILabel!
func configurationWithSetup(list: AnyObject) {
titleLabel.text = list.valueForKey("title") as! String?
eventLabel.text = list.valueForKey("event") as! String?
locationLabel.text = list.valueForKey("location") as! String?
}
}
The warning contains the answer - just change
var lists = [ListEntity]() to
var lists = ListEntity(), or var lists:ListEntity! and when you prepare for segue set that value.
Then you will need to change
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("DataCell") as! DetailsTableViewCell
// as data source is not array you can just you the item you passed
// let list = lists[indexPath.row]
cell.configurationWithSetup(lists)
return cell
}
You should use a static table view if you just want one cell
More info per you current issue
class DetailsTableViewController: UITableViewController {
let managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
var theDetailListEntity:ListEntity!
override func viewDidLoad() {
super.viewDidLoad()
print(theDetailListEntity) // check that you passed it across
}
// MARK: - Table view data source
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("DataCell") as! DetailsTableViewCell
cell.configurationWithSetup(theDetailListEntity)
return cell
}
}
Don't forget to add prepare for segue in the listTableViewController otherwise theDetailListEntity won't be set... and then it will crash.
Depending on how you set up your segue, it may differ. But this is what you need
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
performSegueWithIdentifier("showMyDetailView", sender: indexPath)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "showMyDetailView" {
guard let
vc = segue.destinationViewController as? DetailsTableViewController,
ip = sender as? NSIndexPath else { fatalError() }
let item = lists[ip.row]
vc.theDetailListEntity = item
// set the item in the next VC
tableView.deselectRowAtIndexPath(ip, animated: true)
}
}
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)
}
}
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
}
}
You didn't set the delegate in your segue, so mDelegate is nil in your sendBackFriendList method