I want to pass the storage data contained in a TableView and pass it to another ViewController. My customCell has an UIImage and a String. When the user press the cell I want to show a "detail view controller" with the UIImage and a label containing the info of the cell selected.
Here is my code:
import UIKit
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
@IBOutlet weak var dataTableView: UITableView!
var myList = [dataList]()
var textToBeSent: String = ""
var selectedImage: UIImage?
var selectedLabel: String?
//Load Items To List
func loaditems(){
let item1 = dataList(photoList: UIImage.self(), itemDescription: "Descripcion Aqui")
let item2 = dataList(photoList: UIImage.self(), itemDescription: "Aqui tmb")
myList += [item1,item2]
}
//var list = ["Documento 1", "Documento 2", "Documento 3"]
override func viewDidLoad() {
super.viewDidLoad()
if let savedData = loadSavedItems(){
myList += savedData
} else {
loaditems()
}
//dataTableView.register(UITableViewCell.self, forCellReuseIdentifier: "reusablecell")
// Do any additional setup after loading the view, typically from a nib.
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
return myList.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "prototype", for: indexPath) as! PrototypeCell
let itemsinCell = myList[indexPath.row]
cell.imageItem.image = itemsinCell.photoList
cell.itemDescription.text = String(itemsinCell.itemDescription)
return cell
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete{
myList.remove(at: indexPath.row)
dataTableView.reloadData()
}
saveToSavedData()
}
Here is the func where I want to pass the data of a certain cell. The data is from a Swift file stored in a "DataList" using aDecoder NSCoder.
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("Row \(indexPath.row) selected")
selectedImage! = myList[indexPath.row].photoList
selectedLabel! = myList[indexPath.row].itemdescription
performSegue(withIdentifier: "selectedRowSegue", sender: myList[indexPath.row])
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if(segue.identifier == "selectedRowSegue"){
let chosenRowViewController = segue.destination as! chosenRowViewController
chosenRowViewController.image3 = selectedImage?.photoList
chosenRowViewController.label3 = selectedLabel?.itemDescription
}
}
Unwind a segue in order to fill up the cells with data from previous ViewController:
//Unwinde Segue
@IBAction func unWindlToList(sender: UIStoryboardSegue){
if let sourceViewController = sender.source as? ProcessViewController, let item = sourceViewController.item{
let newIndexPath = IndexPath(row: myList.count, section: 0)
myList.append(item)
dataTableView.insertRows(at: [newIndexPath], with: .automatic)
}
saveToSavedData()
}
//Archive Data
func saveToSavedData(){
NSKeyedArchiver.archiveRootObject(myList, toFile: (dataList.fileFolder?.path)!)
}
//Unarchive Data
func loadSavedItems() -> [dataList]?{
return NSKeyedUnarchiver.unarchiveObject(withFile: (dataList.fileFolder?.path)!) as? [dataList]
}
}
class PrototypeCell: UITableViewCell {
@IBOutlet weak var itemDescription: UILabel!
@IBOutlet weak var imageItem: UIImageView!
}
There are several things that stand out.
1- var myList = [dataList]()
dataList is a Class
, classes should be capitalized. It should be var myList = [DataList]()
2- You have this as a class property but it's not used anywhere in the code you posted so why did you add it and what is it's purpose? var textToBeSent: String = ""
3- You have these 2 class property variables
var selectedImage: UIImage?
var selectedLabel: String?
to hold the data from [myList]
but you really don't need them because you can just access the data from [myList]
using dot notation
inside prepareForSegue
(read the commented out code in prepareForSegue).
4- In prepareForSegue you have let chosenRowViewController = segue.destination as! chosenRowViewController
. ChosenRowViewController is a class and it should be capitalized like so:
let chosenRowViewController = segue.destination as! ChosenRowViewController // it's capitalized after the as!
Here's the code a little cleaned up.
@IBOutlet weak var dataTableView: UITableView!
var myList = [DataList]()
func loaditems(){
let item1 = dataList(photoList: UIImage.self(), itemDescription: "Descripcion Aqui")
let item2 = dataList(photoList: UIImage.self(), itemDescription: "Aqui tmb")
myList.append(item1)
myList.append(item2)
}
override func viewDidLoad() {
super.viewDidLoad()
// everything you already have inside here...
}
// your tableView datasource methods...
5- Since your using prepareForSegue
you don’t need didSelectRowAt indexPath
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if(segue.identifier == "selectedRowSegue"){
// get the indexPath for the selectedRow
let indexPath = tableView.indexPathForSelectedRow
let chosenRowViewController = segue.destination as! ChosenRowViewController
chosenRowViewController.image3 = myList[indexPath!.row].photoList // use dot notation to access the photoList property
chosenRowViewController.label3 = myList[indexPath!.row].itemDescription // use dot notation to access the itemDescription property
}
}
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