Simple UITableView in Swift - unexpectedly found nil

Question

Pretty simple code:

func numberOfSectionsInTableView(tableView: UITableView?) -> Int {
    return 1
}

func tableView(tableView:UITableView!, numberOfRows         


        

Answer 1

You need to check two things

1. Register cell with nib name in viewDidLoad

---

func viewDidLoad() 
{
    super.viewDidLoad()
    listTableView.register(UINib.init(nibName: "ListProductCell", bundle: nil), forCellReuseIdentifier: "ListProductCell")
 }

2. Create custom cell this way.

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

Answer 2

In Swift 5

First I tried registering my UITableViewCell in viewdidload() using class and identifier which I have mentioned below but it did not work for me.

self.tableView.registerClass(MyCustomTableViewCell.self, forCellReuseIdentifier: "customCell")

Solution

Then I registered my UITableViewCell using Nib name and it worked for me

Register your cell in viewdidload() using Nib name

override func viewDidLoad() 
{
    super.viewDidLoad()
    // Do any additional setup after loading the view.

    //register your table view cell in Viewdidload() using Nib Name       
    tableView.register(UINib.init(nibName: "MyCustomTableViewCell", bundle: nil), forCellReuseIdentifier: "customCell")
}

Answer 3

Possibly that your view in Main.Storyboard lost its IBOutlet reference in ViewController file, just link it again.

Answer 4

Try doing this:

let cell = tableView.dequeueReusableCellWithIdentifier("BookCell", forIndexPath: indexPath) as! BookTableViewCell

and don't forget to set the reuse identifier in your storyboard

Answer 5

I was getting this error because I didn't have the identifier written in the Storyboard of the Custom Cell.

Also make sure it matches you code in:

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
    {

        let cell = tableView.dequeueReusableCellWithIdentifier("CustomTableCell") as CustomTableCell

        ...
    }

Answer 6

Swift 5 In same storyboard two class are there Class A and Class B, Class B contains tableview outlet, when i tried to push Class A to Class B it's crashed and show tableView outlet nil.

In class A i did navigation like below code.

let classBObj = ClassB()
self.navigationController?.pushViewController(classBObj, animated: true)

Then i realised my mistake and used below code and it's work perfectly.

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let classBObj = storyboard.instantiateViewController(withIdentifier: "ClassB") as! ClassB
self.navigationController?.pushViewController(classBObj, animated: true)