Passing data with segue in the tableViewCell - ios

Question

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!

Answer 1

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()
}