class ChecklistViewController has no initialiser?

When I try to run my app it suddenly shows the error of class has no initialisers. Tell me whether their is any code problem or a variable declaration problems.Can anyone tells me the reason behind this error.

import UIKit
class ChecklistViewController: UITableViewController {



var row0item: ChecklistItem
var row1item: ChecklistItem
var row2item: ChecklistItem
var row3item: ChecklistItem
var row4item: ChecklistItem    


override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int

{
    return 5

}




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

{
    let cell = tableView.dequeueReusableCellWithIdentifier("ChecklistItem")

    let label = cell!.viewWithTag(1000) as! UILabel



    if indexPath.row == 0 {

        label.text = row0item.text

    } else if indexPath.row == 1 {

        label.text = row1item.text

    } else if indexPath.row == 2 {

        label.text = row2item.text

    } else if indexPath.row == 3 {

        label.text = row3item.text

    } else if indexPath.row == 4 {

        label.text = row4item.text

    }

    configureCheckmarkForCell(cell!, indexPath: indexPath)

    return cell!
}





override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {


    if let cell = tableView.cellForRowAtIndexPath(indexPath) {


        if indexPath.row == 0 {
            row0item.checked = !row0item.checked

        } else if indexPath.row == 1 {
            row1item.checked = !row1item.checked

        } else if indexPath.row == 2 {
            row2item.checked = !row2item.checked

        } else if indexPath.row == 3 {
            row3item.checked = !row3item.checked
        } else if indexPath.row == 4 {
            row4item.checked = !row4item.checked

        }
        configureCheckmarkForCell(cell, indexPath: indexPath)

    }
    tableView.deselectRowAtIndexPath(indexPath, animated: true)

}








override func viewDidLoad() {
    super.viewDidLoad()

}





override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}






func configureCheckmarkForCell(cell: UITableViewCell, indexPath: NSIndexPath) {

    var isChecked = false

    if indexPath.row == 0 {

    isChecked = row0item.checked
}
    else if indexPath.row == 1 {

    isChecked = row1item.checked
}
    else if indexPath.row == 2 {

    isChecked = row2item.checked
}
    else if indexPath.row == 3 {

    isChecked = row3item.checked
}
    else if indexPath.row == 4 {

    isChecked = row4item.checked }

    if isChecked {

    cell.accessoryType = .Checkmark

} else {

    cell.accessoryType = .None
    }
}

}