Myujth

My code reads cities array to a tableView.

• When a cell is clicked, it move to a SecondViewController. The SecondViewController has a button.




• If I clicked the button, it will display an image into that cell.

Problem: I am trying to update the cell whenever the button is clicked. It is working but no matter which cell is clicked, it always displays the image for cell 3, if I clicked again it displays for cell number 1 image.

How to fix this so that when the button is clicked, it display the image for it's cell and if the same cell is clicked, hide the image.

My codes:

var first = 0
var reload = false
var cellNumber: Int!

var cities:[String] = ["paris", "moscow", "milan","rome","madrid","garda","barcelona"]

@IBOutlet weak var tableView: UITableView!
// func to reload a cell
@objc func toReload(rowNumber: Int)
 reload = true

 let indexPath = IndexPath(row: rowNumber , section: 0)
 tableView.reloadRows(at: [indexPath], with: .none)


// load tableview from a SecondViewController call
@objc func loadList(notification: NSNotification)

 self.tableView.reloadData() // reload tableview
 toReload(rowNumber: cellNumber)



func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 
 return cities.count



func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 
 let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! CustomCell

 cell.label1.text = cities[indexPath.row]

 let image : UIImage = UIImage(named: "20870718")! // assign imageView to an image

 if first == 0 
 cell.myimage.isHidden = true // hide image
 first = 1 // condition to never enter again
 

 if reload == true 

 if cell.myimage.isHidden == true 
 cell.myimage.image = image
 cell.myimage.isHidden = false
 
 else
 cell.myimage.isHidden = true
 
 reload = false

 

 return cell


func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) 
 self.cellNumber = indexPath.row

 performSegue(withIdentifier: "send", sender: self)



override func viewDidLoad() 
 super.viewDidLoad()
 tableView.reloadData()

 NotificationCenter.default.addObserver(self, selector: #selector(loadList), name: NSNotification.Name(rawValue: "load"), object: nil)
 // call load list method

}

SecondViewController:

@IBAction func displayImage(_ sender: Any) 

 NotificationCenter.default.post(name: NSNotification.Name(rawValue: "load"), object: nil)

There is a problem in your cellForRowAt.when secondViewController notify the first one no matter which cell you are reloading cellForRowAt always will be called because when you scroll tableView wants to recuse cell and reload == true becomes true for all cells.so you have to check if indexPath.row == cellNumber then do the rest work :

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 
 let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! CustomCell
 cell.label1.text = cities[indexPath.row]
 let image : UIImage = UIImage(named: "20870718")! // assign imageView to an image
 if first == 0 
 cell.myimage.isHidden = true // hide image
 first = 1 // condition to never enter again
 
 if indexPath.row == cellNumber 
 if reload == true 
 if cell.myimage.isHidden == true 
 cell.myimage.image = image
 cell.myimage.isHidden = false
 
 else 
 cell.myimage.isHidden = true
 
 reload = false
 
 
 return cell