how to pass the value from table view cell to view controller - ios

Question

I have one table view with many cell.Each cell have one image and one label.And what i need is when ever user press any cell it have to go to detail viewcontroller.And there i need to show the respective image and label name in my detail view controller.How to do that.
I have done all segue.But in my detail view controller i have one image and label.Now how can i show the image and label name - when i select the any cell from my table view ??
import UIKit
class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {
#IBOutlet var tableView: UITableView!
var valueToPass:String!
var selectedIndexPath: NSIndexPath = NSIndexPath()
var tableData: [String] = ["Christ Redeemer", "Great Wall of China", "Machu Picchu","Petra","Pyramid at Chichén Itzá","Roman Colosseum","Taj Mahal"]
var arrImageName: [String] = ["ChristRedeemer", "GreatWallOfChina", "MachuPicchu","Petra","PyramidChichenItza","RomanColosseum","TajMahal"]
var tableRate: [String] = ["$120", "$100", "$222","$1000","$500","$900","$2000"]
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")
}
func numberOfSectionsInTableView(tableView: UITableView) ->Int
{
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.tableData.count;
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell:CustomTableViewCell = self.tableView.dequeueReusableCellWithIdentifier("CustomTableViewCell") as! CustomTableViewCell
cell.imageVW.image = UIImage(named:self.arrImageName[indexPath.row])
cell.lblName.text = self.tableData[indexPath.row]
cell.rateName.text = self.tableRate[indexPath.row]
return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
self.selectedIndexPath = indexPath
performSegueWithIdentifier("DetailView", sender: indexPath)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?){
let indexPath = self.selectedIndexPath
if (segue.identifier == "DetailView") {
var viewController = segue.destinationViewController as! DetailVC
viewController.data = UIImagePNGRepresentation(UIImage(named:self.arrImageName[indexPath.row])!)!
//viewController.name = self.tableData[[indexPath.row]]
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Here is my detailvc.swift
import UIKit
class DetailVC: UIViewController {
var data: NSData = NSData()
var name: String = String()
#IBOutlet weak var ImgView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
self.ImgView.image = UIImage(data: data)
//self.detailLabelNamee.text = name
}
}

Answer 1

change your did select with something like this
Declare one gloabal indexPath in ViewContrller like this
var selectedIndexPath: NSIndexPath = NSIndexPath()
Change your didselect like this
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
self.selectedIndexPath = indexPath
self.performSegueWithIdentifier("DetailView", sender: self)
}
Now in prepareForSegue method add this
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?){
let indexPath = self.selectedIndexPath
if (segue.identifier == "DetailView") {
var viewController = segue.destinationViewController as! DetailVC
viewController.data = UIImagePNGRepresentation(UIImage(named:self.arrImageName[indexPath.row]))
viewController.name = self.tableData[indexPath.row]
}
}
Now add two global identifier in DetailVC like below
var data: NSData = NSData()
var name: String = String()
Now assign this data and string to imageview and label in viewdid load
change the viewdidload of detailVC like this
override func viewDidLoad() {
super.viewDidLoad()
self.ImgView.image = UIImage(data: data)
self.detailLabelNamee.text = name
}
Hop this will help.

Answer 2

In your didSelectRowAtIndexPath you can just perform the segue and in prepareForSegue you can get the indexPath with self.tableView.indexPathForSelectedRow. And of course it returns an optional and you have to check it first for safety. I think this is the easiest way.

Answer 3

In your didSelectRowAtIndexPath you can get the index path of the selected row and then you can performSegue and pass index path in sender.
In prepareForSeque , from the index path , you can get the image , tableData and tableRate . Which you can pass to detail view . Something like below
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
performSegueWithIdentifier("DetailView", sender: indexPath)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?){
let selectedIndexPath = sender as! NSIndexPath
if (segue.identifier == "DetailView") {
var viewController = segue.destinationViewController as! DetailVC
viewController . setValues(tableData:tableData[selectedIndexPath] , rate: tableRate[selectedIndexPath] , imageName:arrImageName[selectedIndexPath])
}
class DetailVC: UIViewController {
var imageName:String!
var tableData:String!
var tableRate:String!
func setValues(tableData:String , rate:String , imageName:String){
imageName = tableData
tableRate = rate
imageName = imageName
}
or
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?){
let selectedIndexPath = sender as! NSIndexPath
if (segue.identifier == "DetailView") {
var viewController = segue.destinationViewController as! DetailVC
viewController.imageName = self.arrImageName[selectedIndexPath.row]
viewController.tableData = self.tableData[selectedIndexPath.row]
viewController.tableRate = self.tableRate[selectedIndexPath.row]
}

Answer 4

You can declare a variable for store indexpath in that .
var selectedItemIndex = Int()
on click of cell write below lines in didselectowatndexaPath
override func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
selectedItemIndex = indexPath.row
self .performSegueWithIdentifier(“YourViewController”, sender: nil)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let yourVC = segue.destinationViewController as! YourViewController
yourVC.text = tableData[selectedItemIndex]
yourVC.image = UIImage(named:arrImageName[selectedItemIndex])
}

Answer 5

You are almost there! The line:
performSegueWithIdentifier("DetailView", sender: self)
needs changing. 'self' is passing a reference of the current view controller to the prepareForSegue method. If you change 'self' to 'indexPath', then prepareForSegue will see the cell index path in the 'sender' object and you take what you want from that.
You could do something like:
if (segue.identifier == "yourSegueIdentifer") {
var viewController = segue.destinationViewController as! DetailVC
let indexPath = sender as! NSIndexPath
viewController.passedImageName = self.arrImageName[indexPath.row]
viewController.passedData = self.tableData[indexPath.row]
viewController.passedRate = self.tableRate[indexPath.row]
and in DetailVC:
class DetailVC: UIViewController {
var passedImageName:String!
var passedData:String!
var passedRate:String!