uiTableview单元格未显示在视图控制器中

Question

I have ViewController in which I have UITableview and custom cell. My code is correct and I did delegate and datasource also. I have IBoutlets in tableViewCell also. I will see only empty lines nothing else, I don't see cellbackground colour also which is set in storyboard.

class HomeVC: UIViewController , UITableViewDataSource , UITableViewDelegate  {

@IBOutlet weak var profileImg: UIImageView!
@IBOutlet weak var fullnameLbl: UILabel!
@IBOutlet weak var emailLbl: UILabel!
@IBOutlet weak var usernameLbl: UILabel!
@IBOutlet weak var editprofileBtn: UIButton!

var tableData = [AnyObject]()
var username = String()

@IBOutlet var homeSwipe: UISwipeGestureRecognizer!
@IBOutlet weak var tableView: UITableView!
var pflegerId = String()

var weekday = Date().dayOfWeek()

@IBAction func swipe(_ sender: Any) {

}

override func viewDidLoad() {
    super.viewDidLoad()
    self.tableView.delegate = self
    self.tableView.dataSource = self


   //Swipe gesture

     username = (user!["username"] as AnyObject).uppercased
    let fullname = user!["fullname"] as? String
    let email = user!["email"] as? String
   pflegerId = (user!["id"] as? String)!

    usernameLbl.text = username
    fullnameLbl.text = fullname
    emailLbl.text = email

    loadData(username : username)



}

func loadData(username : String) {


    let url = URL(string: "http:..")


    var request = URLRequest(url: url!)
    request.httpMethod = "POST"
    let body = "Id=\(pflegerId)"

    request.httpBody = body.data(using: .utf8)

    URLSession.shared.dataTask(with: request) { data, response, error in

        if error == nil {

            DispatchQueue.main.async(execute: {

                do{
                    let json = try JSONSerialization.jsonObject(with: data!, options: []) as? NSDictionary
                    print(json)


                    guard let parseJSON = json else {
                        print("")
                        return
                    }

                    guard let posts = parseJSON["posts"] as? [AnyObject] else{
                        print("error while parseJSON")
                        return
                    }


                    self.tableData = posts

                    DispatchQueue.main.async {
                        self.tableView.reloadData()
                    }


                }catch {
                    //print("Caught an error: \(error)")
                    DispatchQueue.main.async(execute: {
                        let message = ""
                        appDelegate.infoView(message: message, color: colorSmoothRed)
                    })
                }
            })


        }else {
            //print("error: \(error)")
            DispatchQueue.main.async(execute: {
                let message = error!.localizedDescription
                appDelegate.infoView(message: message, color: colorSmoothRed)
            })

        }
        }.resume()

}





@IBAction func logout_click(_ sender: Any) {
    //alle Daten löschen
    UserDefaults.standard.removeObject(forKey: "parseJSON")
    UserDefaults.standard.synchronize()

    //jetzt wieder zur Login Ansicht wechseln.
    let loginvc = self.storyboard?.instantiateViewController(withIdentifier: "LoginVC") as! LoginVC
    self.present(loginvc, animated: true, completion: nil)


}


//TABLEVIEW

func numberOfSections(in tableView: UITableView) -> Int {

    return 1
}

//Total number of Rows in Table
func tableView (_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

    print(tableData.count)
    return tableData.count


}





func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath as IndexPath) as! todaysPatientsListCell

    // Configure the cell...
    let tableData = self.tableData[indexPath.row]
    cell.patientNameLbl?.text = tableData["name"] as? String
    cell.addressLbl?.text = tableData["address"] as? String
    cell.timeLbl?.text = tableData["timing"] as? String

    return cell

}





func coolSwiped(_ swipe : UISwipeGestureRecognizer) {

    if swipe.direction == .right {
        DispatchQueue.main.async {
            appDelegate.swipeToTomorrow()
            self.tableView.reloadData()
        }
    }
    else if swipe.direction == .left {
        DispatchQueue.main.async {
            appDelegate.swipeToYesterday()
            self.tableView.reloadData()

        }
    }

}

}

Answer 1

I think you should specify rowheight for row.

ex.- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 60.0;
}

Mostly that resolved your problem.Let me know if not resolve.

Thanks Nirav Zalavadia

Answer 2

I have two questions for you:

1. Can you hard code the aray and check it? This would eliminate the server issue.
2. todaysPatientsListCell is this assigned to your custom cell in Storyboard?

Let me know if they helped.

Answer 3

When you reload data after fetching the data, you need to do that in the main thread. So replace this line:

self.tableView.reloadData()

With the following:

DispatchQueue.main.async {
    self.tableView.reloadData()
}