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 Custom UITableViewCell class:

import UIKit

class MyCell: UITableViewCell {

@IBOutlet var cellMyImage: UIImageView
@IBOutlet var cellMyCity: UILabel
@IBOutlet var cellMyCountry: UILabel
@IBOutlet var cellMyTemp: UILabel

init(style: UITableViewCellStyle, reuseIdentifier: String!) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)
}

override func awakeFromNib() {
    super.awakeFromNib()
}

override func setSelected(selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)

}
}

This is code for cell:

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

    var cell = tableView.dequeueReusableCellWithIdentifier(kCellIdentifier, forIndexPath: indexPath) as MyCell!

    if cell == nil {
        cell = MyCell(style: UITableViewCellStyle.Default, reuseIdentifier: kCellIdentifier)
    }

    let cellText: String? = dataWeatherSelectedCity[indexPath.row].name as  String
    println("Строка: \(cellText)")
    cell.cellMyCity.text = cellText

    let cellSubtitle: String? = dataWeatherSelectedCity[indexPath.row].country as String
    cell.cellMyCountry.text = cellSubtitle

    cell.cellMyImage.image = UIImage(named: "Blank52")

    var currentCityWeatherURL = "http://api.wunderground.com/api/\(self.myAPI.kWundergroundApiKey)/conditions/lang:RU/q/zmw:\(self.dataWeatherSelectedCity[indexPath.row].zmv).json"

    var fullObservation:NSDictionary = self.myAPI.jsonParsingWeather(currentCityWeatherURL)
    var currentObservation:NSDictionary = fullObservation.valueForKey("current_observation") as NSDictionary

    var currentWeather = self.myAPI.parsingOneCityCurrentCondition(currentObservation)       
    cell.cellMyImage.image = currentWeather.image
    cell.cellMyTemp.text = currentWeather.temp
    return cell
}

Property in TableViewCell:

Table without self.tableView.registerClass(MyCell.classForCoder(), forCellReuseIdentifier: kCellIdentifier) or self.tableView.registerClass(MyCell.self, forCellReuseIdentifier: kCellIdentifier):

Answer 1

what I did for making that working is something like this:

class MainViewController: UIViewController {

    // ...

    @IBOutlet var tableView: UITableView

    override func viewDidLoad() {
        super.viewDidLoad()

        self.tableView.registerNib(UINib(nibName: "UICustomTableViewCell", bundle: nil), forCellReuseIdentifier: "UICustomTableViewCell")

        // ...
    }

    // ...

}

NOTE: If I use the –registerClass(_: forCellReuseIdentifier:) method, the xib file won't be loaded, therefore the actual custom interface will not appear unless you add the content programatically to the cell. if you'd like to load the interface from a nib file, you need to register the cell with its nib.

---

conforming the essential protocols:

extension MainViewController: UITableViewDataSource {
    
    func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int {
        return 3
    }
    
    func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell! {
        let cell: UICustomTableViewCell = tableView.dequeueReusableCellWithIdentifier(UICustomTableViewCell.reuseIdentifier) as UICustomTableViewCell
        println(cell)
        return cell;
    }
    
}

//

extension MainViewController: UITableViewDelegate {
    
    func tableView(tableView: UITableView!, heightForRowAtIndexPath indexPath: NSIndexPath!) -> CGFloat {
        return 44.0
    }
    
}

---

and the custom cell class was a very generic one with a meaningful name as UICustomTableViewCell:

class UICustomTableViewCell: UITableViewCell {

    class var reuseIdentifier: String {
        get {
            return "UICustomTableViewCell"
        }
    }
    
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    override func setSelected(selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }
    
}

---

with a quite random interface:

and these settings of custom class and reuse identifier:

---

and the final result on my screen is as I expected with 3 rows:

NOTE: for further customisation of the custom cells you may need extend the code above.

UPDATE

with UISearchBar, the final result would be like this: