Swift 3 Custom TableViewCell Error - swift

Question

I am having trouble communicating with the "TableView". How can I solve the problem?
Error Image
Code Image
var arrayOfData = [cellData]()
var fullname1 : String!
var code1 : String!
var name1 : String!
var buy1 : Double!
var sell1 : Double!
var change_rate1 : Double!
var update_date1 : Double!
var arrayFullName : [String] = ["asdas","asds","asds","sadas","asdasd","asdas"]
#IBOutlet weak var tblDoviz: UITableView!
#IBOutlet weak var openBarButton: UIBarButtonItem!
override func viewDidLoad() {
super.viewDidLoad()
arrayOfData = [cellData(fullName: "Amerikan Doları", name: "", code: "USD", updateDate: 2, changeRate: 2, buy: 3.44, sell: 3.47)]
openBarButton.target = self.revealViewController()
openBarButton.action = Selector("revealToggle:")
tblDoviz.delegate = self
tblDoviz.dataSource = self
self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
/* Doviz Sitesinden Bilgiler Çekiliyor */
let url = NSURL(string: "http://www.doviz.com/api/v1/currencies/all/latest")
let task = URLSession.shared.dataTask(with: url as! URL){(data,response,error) ->Void in
if error != nil
{
}
else
{
if let urlContent = data
{
do
{
let jsonResult = try JSONSerialization.jsonObject(with: urlContent, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
if let currencyRate = jsonResult as? NSArray
{
for i in 0..<currencyRate.count
{
if let name = (currencyRate[i] as? NSDictionary)?["name"] as? String
{
self.name1 = name
}
if let fullname = (currencyRate[i] as? NSDictionary)?["full_name"] as? String
{
self.fullname1 = fullname
}
if let change_rate = (currencyRate[i] as? NSDictionary)?["change_rate"] as? Double
{
self.change_rate1 = change_rate
}
if let code = (currencyRate[i] as? NSDictionary)?["code"] as? String
{
self.code1 = code
}
if let update_date = (currencyRate[i] as? NSDictionary)?["update_date"] as? Double
{
self.update_date1 = update_date
}
if let buying = (currencyRate[i] as? NSDictionary)?["buying"] as? Double
{
self.buy1 = buying
}
if let selling = (currencyRate[i] as? NSDictionary)?["selling"] as? Double
{
self.sell1 = selling
}
//Array'a Yükleme Yapılıyor
//cellData.init(fullName: self.fullname1, name: self.name1, code: self.code1, updateDate: self.update_date1, changeRate: self.change_rate1, buy: self.buy1, sell: self.sell1)
//self.arrayOfData = [cellData(fullName: self.fullname1, name: self.name1, code : self.code1, updateDate: self.update_date1, changeRate: self.change_rate1, buy: self.buy1, sell: self.sell1)]
//print(self.arrayOfData)
//print(cellData())
}
print(self.arrayFullName.count)
}
}
catch
{
}
}
}
}
task.resume()
//--------------------------------------------------
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 2
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cellDoviz",for:indexPath) as! DovizCell1
Error-------------------------------------
cell.lblText.text = arrayFullName[indexPath.row]
Error -----------------------------------
return cell as DovizCell1
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 94
}
}

Answer 1

Try adding this to your code
let cell:DovizCell? = tableView.dequeueReusableCell(withIdentifier: "cellDoviz",for:indexPath) as! DovizCell
if cell == nil {
cell = NSBundle.mainBundle().loadNibNamed("DovizCell").first as! DovizCell
}
Your DovizCell might have been nil which is why the code crashed