delete a row in table view in swift

Question

I am trying to delete a row in table view. I have implemented the required methods but when i am swiping the row horizontally no delete button is coming. I have searched and I have found the same solution everywhere but it is not working in my case. I don't know where i am making mistake. Can anyone help me please?

func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool 
{
    return true
}

func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) 
{
     if editingStyle == .Delete 
     {
        dataHandler.deletePeripheral(indexPath.row)
        tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
     }
}

Answer 1

I struggled with this as well but finally found out a solution - I am running XCode 8.3.2. A lot of the answers I read were for older versions of XCode / Swift and many were for Objective-C.

The solution I found was to use the 'editActionsForRowAt' tool for UITableViews. Note: Everything else I read kept pointing me towards the 'commit editingStyle' tool for UITableView, but I could never get it to work. Using editActionsForRowAt worked perfectly for me.

NOTE: 'postData' is the name of the Array that I added data to.

func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {

    let deleteAction = UITableViewRowAction(style: .default, title: "Delete", handler: { (action, IndexPath) in
        // Remove item from the array
        postData.remove(at: IndexPath.row)

        // Delete the row from the table view
        tableView.deleteRows(at: [IndexPath as IndexPath], with: .fade)
        })
        // set DeleteAction Button to RED (this line is optional - it simply allows you to change the color of the Delete button - remove it if you wish)
        deleteAction.backgroundColor = UIColor.red

    return [deleteAction]
}

I also have some code to add an 'EDIT button' alongside the Delete button:

func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {

    let editAction = UITableViewRowAction(style: .default, title: "Edit", handler: { (action, IndexPath) in
        //print("Edit tapped")
        })
        // Set EditAction button to blue (this line is not mandatory - it just sets the color of the Edit box to blue)
        editAction.backgroundColor = UIColor.blue

    let deleteAction = UITableViewRowAction(style: .default, title: "Delete", handler: { (action, IndexPath) in
        //print("Delete tapped")
        // Remove item from the array
        postData.remove(at: IndexPath.row)

        // Delete the row from the table view
        tableView.deleteRows(at: [IndexPath as IndexPath], with: .fade)
        })
        // set DeleteAction Button to RED (this line isn't mandatory - it just sets the color of the Delete box)
        deleteAction.backgroundColor = UIColor.green

    return [editAction, deleteAction]
}

EDIT: fixed format so code showed up in the grey box :)

Answer 2

If below coding is helpful for you,i will be happy

func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool 
{
    return true
}

func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) 
{
     if editingStyle == .Delete 
     {
        yourArray.removeAtIndex(indexPath.row) 
        self.tableView.reloadData()   
     }
}

SWIFT 3.0

func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool
{
    return true
}

func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath)
{
   if editingStyle == .delete
   {
      yourArray.remove(at: indexPath.row)
      tblDltRow.reloadData()
   }
}

You have to refresh the table.