When you want to handle deleting, you have to do three things: first, check that it's a delete that's happening and not an insert (this is down to how you use the UI); second, delete the item from the data source you used to build the table; and third, call deleteRows(at:) on your table view.
So, to remove a cell from a table view you first remove it from your data source, then you call deleteRows(at:) on your table view, providing it with an array of index paths that should be zapped. You can create index paths yourself, you just need a section and row number.
When a user slides horizontally across a row the editing style of the Tabel View Cell is set to delete. When the delete button is pressed, the item is deleted in the array and also the row is deleted in the Table View. Build and run the project and swipe-to-delete a row from the Table View.
Add these two functions:
func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
return true
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if (editingStyle == UITableViewCellEditingStyle.Delete) {
// handle delete (by removing the data from your array and updating the tableview)
}
}
Swift 3.0:
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if (editingStyle == UITableViewCellEditingStyle.delete) {
// handle delete (by removing the data from your array and updating the tableview)
}
}
Swift 4.2
func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if (editingStyle == .delete) {
// handle delete (by removing the data from your array and updating the tableview)
}
}
You can try this:
func tableView(tableView: UITableView!, canEditRowAtIndexPath indexPath: NSIndexPath!) -> Bool {
return true
}
func tableView(tableView: UITableView!, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath!) {
if (editingStyle == UITableViewCellEditingStyle.Delete) {
NamesTable.beginUpdates()
Names.removeAtIndex(indexPath!.row)
NamesTable.deleteRowsAtIndexPaths([indexPath], withRowAnimation: nil)
NamesTable.endUpdates()
}
}
If you're supporting iOS11+ please see the discussion:
Use the performBatchUpdates(_:completion:) method instead of this one whenever possible.
Another way that allows you to change the text of "Delete" and add more buttons when sliding a cell is to use editActionsForRowAtIndexPath
.
func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
return true
}
func tableView(tableView: (UITableView!), commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: (NSIndexPath!)) {
}
func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [AnyObject]? {
var deleteAction = UITableViewRowAction(style: .Default, title: "Delete") {action in
//handle delete
}
var editAction = UITableViewRowAction(style: .Normal, title: "Edit") {action in
//handle edit
}
return [deleteAction, editAction]
}
canEditRowAtIndexPath
and commitEditingStyle
are still required, but you can leave commitEditingStyle
empty since deletion is handled in editActionsForRowAtIndexPath
.
It's new feature in iOS11 and Swift 4.
Reference link :
Trailing Swipe :
@available(iOS 11.0, *)
override func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
let delete = UIContextualAction(style: .destructive, title: "Delete") { (action, sourceView, completionHandler) in
print("index path of delete: \(indexPath)")
completionHandler(true)
}
let rename = UIContextualAction(style: .normal, title: "Edit") { (action, sourceView, completionHandler) in
print("index path of edit: \(indexPath)")
completionHandler(true)
}
let swipeActionConfig = UISwipeActionsConfiguration(actions: [rename, delete])
swipeActionConfig.performsFirstActionWithFullSwipe = false
return swipeActionConfig
}
import UIKit
class ViewController: UIViewController ,UITableViewDelegate,UITableViewDataSource
{
var items: String[] = ["We", "Heart", "Swift","omnamay shivay","om namay bhagwate vasudeva nama"]
var cell : UITableViewCell
}
@IBOutlet var tableview:UITableView
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int {
return self.items.count;
}
func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell! {
var cell = tableView.dequeueReusableCellWithIdentifier("CELL") as? UITableViewCell
if !cell {
cell = UITableViewCell(style: UITableViewCellStyle.Value1, reuseIdentifier: "CELL")}
cell!.textLabel.text = self.items[indexPath.row]
return cell
}
func tableView(tableView: UITableView!, canEditRowAtIndexPath indexPath: NSIndexPath!) -> Bool {
return true
}
func tableView(tableView: UITableView!, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath!) {
if (editingStyle == UITableViewCellEditingStyle.Delete) {
// handle delete (by removing the data from your array and updating the tableview)
if let tv=tableView
{
items.removeAtIndex(indexPath!.row)
tv.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
}
}
}
}
use it :
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
langData.removeAtIndex(indexPath.row) //langData is array from i delete values
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
}
hope it helps you
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