add an item to UITableView on button click in iOS Swift

Question

I am new to iOS development and I am working with this tutorial , to create a simple TO-DO list app

I have a view controller to which I have added a UITableView & a UIBarButtonItem. I want to add an item (a title) to the UITableView on the UIBarButtonItem click. I had written the code but I am not sure whats wrong

class contactsMenu: UIViewController, UITableViewDataSource , UITableViewDelegate {

    @IBOutlet weak var tableView: UITableView!

    var toDoItems = [todoItem]()
    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.dataSource = self
        tableView.delegate = self
        tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")
        if toDoItems.count > 0 {
            return
        }
    }

    override func viewDidAppear(animated: Bool) {
        tableView.reloadData()
    }



    @IBAction func addAGroupBtnclicked(sender: UIBarButtonItem) {
       toDoItems.append(todoItem(text: "ok"))
    }

    @IBAction func backBtn(sender: UIBarButtonItem) {
        self.dismissViewControllerAnimated(true, completion: nil)
    }

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

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

    func tableView(tableView: UITableView,
        cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
            let cell = tableView.dequeueReusableCellWithIdentifier("cell",
                forIndexPath: indexPath) as UITableViewCell
            let item = toDoItems[indexPath.row]
            cell.textLabel?.text = item.text
            return cell
    }
}

and my todoItem.swift file :

class todoItem : NSObject{

    var text: String

    // A Boolean value that determines the completed state of this item.
    var completed: Bool

    // Returns a ToDoItem initialized with the given text and default completed value.
    init(text: String) {
        self.text = text
        self.completed = false
    }
}

Abdullah · Accepted Answer · 2015-04-12 07:15:17Z

1

Assuming addAGroupBtnclicked() is the click handler for your button to add a new task.

@IBAction func addAGroupBtnclicked(sender: UIBarButtonItem) {
    toDoItems.append(todoItem(text: "ok"))
    tableView.reloadData()
}

After changing the data source you need to reload data in order to reflect changes on to UI. For more efficient reloading and reloading part of UITableView check other 'reload' methods of UITableView.

answered Apr 12, 2015 at 7:15

Abdullah

7,2436 gold badges28 silver badges42 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

add an item to UITableView on button click in iOS Swift

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related