Custom UITableViewCell register class in Swift

Question

In my application, I fill the table on the basis of the array. The table uses custom UITableViewCell. Everything works fine, table is filled. Then I add Search Display Controller to my UITableViewController, no write code to handle the search, simply add the controller. When you run the application, the table is still filled.But if I try to click on the search bar, I get the error: `Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'unable to dequeue a cell with identifier CitiesListCell - must register a nib or a class for the identifier or connect a prototype cell in a storyboard'` I try to add to my viewDidLoad function in UITableViewController line: `self.tableView.registerClass(MyCell.classForCoder(), forCellReuseIdentifier: kCellIdentifier)` Launch the application and immediately get the error: `fatal error: unexpectedly found nil while unwrapping an Optional value` In line `cell.cellMyCity.text = cellText` What am I doing wrong? This is my Cu…

Accepted Answer

As error suggest you are getting your `cell` or `UITestField` `nil` and `Swift` doesn't support method call on nil object that's why you are getting crash. you can prevent crash by checking the object is nil or not as bellow

```
if var label = cell.cellMyCity{
    label.text = cellText
}
```

EDIT

I think I got what is the problem here...

You have drag-n-drop `UISearchBar` in your `storyboard`, So by defaults all data source and delegate set to your Controller say, `ViewController`(class in which you override UITableView DataSource methods) and in that `ViewController` you register MyCell class as your customize class. So your tableView displays perfect but when you type something to UISearchBar, same DataSource methods (`ViewController`) called and there as well, you registers MyCell for `searchResultsTableView` (`UISearchDisplayController` tableView thats display search result), but that doesn't know about MyCell and that's why `cell.cellMyCity` is coming as nil in case of search, that means `searchResultsTableView` expect the default `UITableViewCell` and you are not setting anything for default cell like -

```
cell.textLabel.text = countryList[indexPath.row]
```

this whole scenario you can observe by changing you DataSource methods as bellow

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

var cell = tableView.dequeueReusableCellWithIdentifier(kCellIdentifier) as MyCell!
    if cell == nil {
        //tableView.registerNib(UINib(nibName: "UICustomTableViewCell", bundle: nil), forCellReuseIdentifier: "UICustomTableViewCell")
        tableView.registerClass(MyCell.classForCoder(), forCellReuseIdentifier: kCellIdentifier)

cell = MyCell(style: UITableViewCellStyle.Default, reuseIdentifier: kCellIdentifier)
    }
    if var label = cell.cellMyCity{
        label.text = countryList[indexPath.row]
    }
    else{
        cell.textLabel.text = countryList[indexPath.row]
    }
    return cell
}
```

As far as Solution is concern, there could be two possible solution..

A). Don't use `searchResultsTableView` (provided by `UISearchDisplayController`) and display your search results in the same `tableView` that you have in your `ViewController`. For that what you can do is - listen to the `UISearchBar` delegates when user type some thing in `UISearchBar` get your result datasource (May be in different array) by Predicates and Display results in the same `UITableView`.

B). Customize UISearchDisplayController and use your custom cell (i.e MyCell) in `searchResultsTableView`

Custom UITableViewCell register class in Swift

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