CODEWITHSUNDEEP
swiftuitableview
Matt
Matt

Reputation: 159

Crash when using TableviewController

I'm trying to use a TableViewController but it makes me crazy because I really don't understand my code crashes in one project but not the other.

The same code (copy-pasted) to different XCode project runs successfully.

Here's my code: 

import UIKit
class ViewController: UITableViewController {
    var listeDeListes = [AnyObject]()
     override func viewDidLoad() {
        super.viewDidLoad()

        self.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Add, target: self, action: #selector(ViewController.addItem))

        if (NSUserdefault.standartDefault.objectForKey("identity") != nil) {
            listeDeListes = NSUserDefaults.standardUserDefaults().arrayForKey("identity")!
        }  
    }

    func addItem() {

        let alertController = UIAlertController(title: "New Resolution", message: "", preferredStyle: UIAlertControllerStyle.Alert)
        let confirmAction = UIAlertAction(title: "Confirm", style: UIAlertActionStyle.Default, handler: ({
            (_) in

            if let field = alertController.textFields![0] as? UITextField {

                self.saveItem(field.text!)
                self.tableView.reloadData()
            }
        }))

        let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil)
        alertController.addTextFieldWithConfigurationHandler ({
            (textField) in

            textField.placeholder = "Type smothing..."

        })

        alertController.addAction(confirmAction)
        alertController.addAction(cancelAction)

        self.presentViewController(alertController, animated: true, completion: nil)
    }

    func saveItem(itemToSave: String) {
        let defaults = NSUserDefaults.standardUserDefaults()
        //defaults.setInteger(identity, forKey: "identity")

        listeDeListes = listeDeListes + [itemToSave]
       defaults.setObject(listeDeListes, forKey: "identity")
        defaults.synchronize()

    }
    override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
        return 50
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return listeDeListes.count
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("Cell")! as UITableViewCell

        let item = listeDeListes[indexPath.row]

        cell.textLabel?.text = item as! String

        return cell
    }

This code works and does't work at the same time. Please help me to find why and how.

In the the "bad" project" I get this error message: image

Upvotes: 0

Views: 129

Answers (2)

meowmeowmeow
meowmeowmeow

Reputation: 762

it's probably because you did not set a Reuse Identifier via Storyboard for your table view's Prototype cells.

Could you also try changing your cell code to

let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! UITableViewCell

Upvotes: 1

Swifty
Swifty

Reputation: 3760

You need to register the cell with the same identifier.

Since you're using storyboard to setup your table, in your storyboard select the cell inside your TableViewController then open the Attributes Inspector (⌥⌘4) and write Cell in front of Identifier.

Upvotes: 1

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