TableView doesnot show the data? - ios

Question

My tableView does not show the data. I am fetching the data through api and save it into separate class with initializers. But it does not the show on the tableView. How to resolve this issue. I am new to iOS. I know there is only one line of code problem somewhere.
I call api in viewDidLoad method.
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(true)
//fetch all expected visitor data
self.apiExpectedVisitor(strURL: urlViewExpectedVisitors)
self.expectedTableView.reloadData()
}
Function of API Method
func apiExpectedVisitor(strURL: String)
{
fetchedExpectedData = []
//URL
let myURL = URL(string: strURL)
//URL Request
let request = NSMutableURLRequest(url: myURL!)
request.httpMethod = "GET"
request.setValue("application/json", forHTTPHeaderField: "Accept")
let token = "Bearer " + strToken
request.addValue(token, forHTTPHeaderField: "Authorization")
let postTask = URLSession.shared.dataTask(with: request as URLRequest) { (data, response, error) in
print(response!)
guard error == nil else {
return
}
guard let data = data else {
return
}
do {
//create json object from data
if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: [Any]] {
print("POST Method :\(json)")
DispatchQueue.main.async {
for expectedVisitors in json["expected_visitors"]!
{
let eachData = expectedVisitors as! [String: Any]
let id = eachData["id"] as! Int
let name = "\(String(describing: eachData["name"]))"
let email = "\(String(describing: eachData["email"]))"
let phone = eachData["phone"] as! String
let verification_code = "\(String(describing: eachData["expected_visitor_verification_code"]))"
let qr_code = eachData["expected_visitor_qr_code"] as? String
let isVisited = eachData["is_visited"] as! Int
let company_id = eachData["company_id"] as! Int
let purpose = "\(String(describing: eachData["purpose"]))"
let meeting_date = eachData["meeting_date"] as! String
let meeting_time = eachData["meeting_time"] as! String
let created_at = eachData["created_at"] as! String
let updated_at = eachData["updated_at"] as! String
//Date.formatter(createdDate: createdDate)
if let department_id = eachData["department_id"] as? Int, let employee_id = eachData["employee_id"] as? Int, let location_id = eachData["location_id"] as? Int, let image = eachData["image"] as? String, let duration = eachData["duration"] as? String {
fetchedExpectedData.append(FetchedAllExpectedVisitors.init(id: id, name: name, email: email, phone: phone, department_id: department_id, employee_id: employee_id, location_id: location_id, image: image, verification_code: verification_code, qr_code: qr_code!, isVisited: isVisited, company_id: company_id, purpose: purpose, meeting_date: meeting_date, meeting_time: meeting_time, duration: duration, created_at: created_at, updated_at: updated_at))
self.expectedTableView.reloadData()
}
}
}
}
} catch let error {
print(error.localizedDescription)
}
}
postTask.resume()
}
TableView DataSource and Delegate Methods
func numberOfSections(in tableView: UITableView) -> Int {
return fetchedExpectedData.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ShowExpectedCell", for: indexPath) as! ShowExpectedTVCell
cell.lblDate.text = fetchedExpectedData[indexPath.section].created_at
cell.lblVisName.text = fetchedExpectedData[indexPath.section].name
print(fetchedExpectedData[indexPath.section].name)
for i in 0..<fetchedDepttData.count {
let department_id = fetchedDepttData[i].depttID
if fetchedExpectedData[indexPath.section].department_id == department_id
{
cell.lblDeptt.text = fetchedDepttData[i].depttName
}
}
for i in 0..<fetchedEmployeeData.count {
let employee_id = fetchedEmployeeData[i].empID
if fetchedExpectedData[indexPath.section].employee_id == employee_id
{
cell.lblEmpName.text = fetchedEmployeeData[i].name
}
}
return cell
}

Answer 1

Check below points:-
Make sure you registered tableview cell nib and added dataSource and Delegate.
You are reloading tableview after your fetchedExpectedData array filled

Answer 2

Just add the below code in viewDidLoad
expectedTableView.delegate = self
expectedTableView.datasource = self
also check if you have set UITableViewDelegate , UITableViewDataSource in starting of the controller
class Yourviewcontrollername: UIViewController,UITableViewDelegate,UITableViewDataSource
{
//Rest of the code
}
Also put breakpoint in all delegate methods and see if anything hits.