table view cannot be displayed on device - ios

Question

I am developing iOS app where I want to display table content one my device.but unable fetch and display...but contents are being displayed on console view.
I am using json getmethod() to fetch the details
also using view controller and view table and swift language
import UIKit
class UpdateSheetManagementViewController:
UIViewController, UITableViewDelegate, UITableViewDataSource, WebserviceDelegate {
//var FinalArray = [[String:Any]]()
// class func instantiateFromStoryboard() -> UpdateSheetManagementViewController {
// let storyboard = UIStoryboard(name: "Management", bundle: nil)
// return storyboard.instantiateViewController(withIdentifier: String(describing: self)) as! UpdateSheetManagementViewController
// }
#IBOutlet weak var managementTableView: UITableView!
var controllerType : String!
var array = [[String : Any]]()
override func viewDidLoad() {
super.viewDidLoad()
title = controllerType
updatesheetWebserviceCall()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
// updatesheetWebserviceCall()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 320.0
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return array.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// let cell = tableView.dequeueReusableCell(withIdentifier: "UpdateSheetManagementTableViewCell", for: indexPath) as! UpdateSheetManagementTableViewCell
let cellIdentifier : String = "UpdateSheetManagementTableViewCell";
let cell : UpdateSheetManagementTableViewCell =
tableView.dequeueReusableCell(withIdentifier: cellIdentifier) as! UpdateSheetManagementTableViewCell
let dict = array[indexPath.section]
cell.classname.text = dict["Cls_Name"] as? String
cell.dateFrom.text = dict["Date_From"] as? String
cell.date_To.text = dict["Date_To"] as? String
cell.downloadButton.tag = indexPath.row
cell.downloadButton.addTarget(self, action: #selector(onDownloadButtonClicked(button:)), for: .touchUpInside)
return cell
}
func onDownloadButtonClicked(button : UIButton) {
let postion = button.tag
let data = array[postion]
let attachment = data["Attachment"] as? String
if(attachment != nil && attachment!.characters.count > 0){
let userid = UserDefaults.standard.string(forKey: USER_ID)
let finalString = "https://skillskool.mycit.co.in/PagesParentApp/Today-ClassNotes.aspx?FilePath=" + attachment! + "&UserId=" + userid! + "&PageName=UpdateSheet"
let url = URL(string: finalString)
if(url != nil){
UIApplication.shared.open(url!, options: [:], completionHandler: nil)
}
}
}
func updatesheetWebserviceCall() {
let str = ""
let webClass = WebserviceClass()
webClass.delegate = self
webClass.fireRequest(functionName: "MgmtUpdateSheet.php", requestString: str, view: view)
}
func webserviceDidFinishWith(response: [String : Any], functionName: String) {
parseUpdateSheetWebservice(response: response)
}
func parseUpdateSheetWebservice(response : [String : Any]) {
let arr = response["homework"] as? [[String : Any]]
if(arr != nil){
// array.removeAll()
self.array.append(contentsOf: arr!)
// managementTableView.reloadData()
}
}
}

Answer 1

Add managementTableView.reloadData() after updating the data and make sure to set the delegate and datasource in either view controller or storyboard

Answer 2

Set tableview delegate and datasource in viewDidLoad and reload tableview in web service response.
// set tableview delegate and datasource in viewDidLoad
override func viewDidLoad() {
super.viewDidLoad()
title = controllerType
managementTableView.dataSource = self
//managementTableView.delegate = self
updatesheetWebserviceCall()
}
// reload tableview upon web service response
func parseUpdateSheetWebservice(response : [String : Any]) {
let arr = response["homework"] as? [[String : Any]]
if(arr != nil){
// array.removeAll()
self.array.append(contentsOf: arr!)
self.managementTableView.reloadData()
/*
// or reload table using main queue, if you web service operation is in background queue
DispatchQueue.main.async {
self.managementTableView.reloadData()
}
*/
}
}

Answer 3

In the beginning, you need to set tableview dataSource and delegate and after loading data you also need to reload data.
self.managementTableView.delegate = self;
self.managementTableView.datasource = self;
Reload data:
self.array.append(contentsOf: arr!)
self.managementTableView.reloadData()

Answer 4

You have to set in viewDidLoad
managementTableView.dataSource = self
and un comment managementTableView.reloadData()
func parseUpdateSheetWebservice(response : [String : Any]) {
let arr = response["homework"] as? [[String : Any]]
if(arr != nil){
// array.removeAll()
self.array.append(contentsOf: arr!)
DispatchQueue.main.async {
managementTableView.reloadData() }
}
}

Answer 5

I think delegate and datasource connections are missed, please add the following code in viewDidLoad function:
self.managementTableView.delegate = self;
self.managementTableView.dataSource = self;