How to pass TableViewCell value into new ViewController in Swift 3.0? - ios

Question

I have this JSON data
move.json
{
"status":"ok",
"movement":
[
{
"refno":"REF 1",
"dtfrom":"2017-13-12"
},
{
"refno":"REF 2",
"dtfrom":"2017-13-13"
},
{
"refno":"REF 3",
"dtfrom":"2017-13-14"
},
]
}
So far, I managed to fetch the value into TableViewCell.
But my goal is to pass the value from ViewController.swift into MoveDetails.swift so the value can be display in MoveDetails.swift
And I have these four swift files. I'm having the problem on ViewController.swift and MoveDetails.swift. I'm not sure how to pass the value into new Controller.
The code as below.
ViewController.swift
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var tableview: UITableView!
var move: [Move]? = []
override func viewDidLoad() {
super.viewDidLoad()
fetchData()
}
func fetchData() {
let urlRequest = URLRequest(url: URL(string: "http://localhost/move.json")!)
let task = URLSession.shared.dataTask(with: urlRequest) {
(data,response,error)in
if error != nil { return }
self.move = [Move]()
do {
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! [String: AnyObject]
if let msFromJson = json["movement"] as? [[String: AnyObject]] {
for mFromJson in msFromJson {
let ms = Move()
if let refno = mFromJson["refno"] as? String, let dtfrom = mFromJson["dtfrom"] as? String {
ms.refno = refno
ms.dtfrom = dtfrom
}
self.move?.append(ms)
}
}
DispatchQueue.main.async {
self.tableview.reloadData()
}
}
catch let error{ print(error)}
}
task.resume()
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "movementstatusCell", for: indexPath) as! MoveCell
cell.refnoLbl.text = self.move?[indexPath.item].refno
cell.dtfromLbl.text = self.move?[indexPath.item].dtfrom
return cell
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.move?.count ?? 0
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let vc = self.storyboard?.instantiateViewController(withIdentifier: "MoveDetails") as! MoveDetails
let selectedMove = self.move?[indexPath.item]
vc.refnoString = selectedMove.refno
vc.dtfromString= selectedMove.dtfrom
self.navigationController?.pushViewController(vc, animated: true)
}
}
MoveCell.swift
import UIKit
class MoveCell: UITableViewCell {
#IBOutlet weak var dtfromLbl: UILabel!
#IBOutlet weak var refnoLbl: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
}
Move.swift (NSObject)
import UIKit
class Move: NSObject {
var refno: String?
var dtfrom: String?
}
MoveDetails.swift
import UIKit
class MoveDetails: UIViewController {
#IBOutlet weak var refnoLbl: UILabel!
#IBOutlet weak var dtfromLbl: UILabel!
var refnoString: String!
var dtfromString: String!
override func viewDidLoad() {
super.viewDidLoad()
refnoString = refnoLbl.text
dtfromString = dtfromLbl.text
}
override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() }
}
Appreciate if someone can help. Thanks.

Answer 1

You will just have to set the properties of your MoveDetails view controller. And as a suggestion
Instead of storing refnoString and dtfromString properties in MoveDetails, you could just store one property of type Move:
Cache MoveDetails view controller to reuse it
Implement viewDidAppear to update the MoveDetails outlets
So:
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
var detailsVC : MoveDetails?
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if (detailsVC == nil) {
detailsVC = self.storyboard?.instantiateViewController(withIdentifier: "MoveDetails") as! MoveDetails
}
detailsVC.move = self.move?[indexPath.item]
self.navigationController?.pushViewController(detailsVC , animated: true)
}
}
Then, override viewDidAppear in MoveDetails view controller and there you just fill in the values into the text label outlets.
class MoveDetails: UIViewController {
#IBOutlet weak var refnoLbl: UILabel!
#IBOutlet weak var dtfromLbl: UILabel!
var move:Move?
override func func viewDidAppear(_ animated: Bool) {
refnoLbl.text = move?.refno
dtfromLbl.text = move?.dtfrom
}
}
Syntax errors cause because I currently have no Xcode available to do the checking