I have UIViewController and I dragged a UITableView inside and I want to insert some elements to the table and be able to remove them here . When I use this code it works fine for UITableViewController but now when I want to remove a cell I can swap it but the deleting animation (Red sign) doesn't show up
import UIKit
class ViewController: UIViewController , UITableViewDataSource , UITableViewDelegate {
var listArray = ["Danial"]
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.
}
#IBOutlet var table: UITableView!
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return listArray.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell = UITableViewCell()
cell.textLabel?.text = listArray[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){
listArray.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic) }
}
}
The problem with your code is that you are typing:
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if (editingStyle == UITableViewCellEditingStyle.Delete){
listArray.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic) }
}
instead of
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if (editingStyle == UITableViewCellEditingStyle.Delete){
listArray.removeAtIndex(indexPath.row)
self.table.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic) }
}
so just go to everywhere where you wrote
tableView.
and change it to self.table.
(basically what you named your tableview from the IBOutlet)
Related
I have uiviewcontroller with uitableview
and swipe to delete work fine but
when I set uitableview semantic to force right-to-left the swipe to delete not even shown in the tableview
classViewController:UIViewController,UITableViewDelegate,UITableViewDataSource {
var yourArray : [Type] = []
override func viewDidLoad() {
super.viewDidLoad()
tablView.delegate = self
tablView.dataSource = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return yourArray.count
}
func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete{
tableView.beginUpdates()
yourArray.remove(at: indexPath.row)
tableView.endUpdates()
tableView.reloadData()
}
}
}
Please help, I'm at my wit's end. I've followed multiple tutorials, read every thread similar to this I can find, and five hours later, I'm still lost and getting the same error: "type ViewController doesn't conform to UITableViewDataSource."
Code:
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet var proTable: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
proTable.reloadData()
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
return pcMgr.pros.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
let cell: UITableViewCell = UITableViewCell(style: UITableViewCellStyle.subtitle, reuseIdentifier: "Default Pros")
cell.textLabel?.text = pcMgr.pros[indexPath.row].name
return cell
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath){
if (editingStyle == UITableViewCellEditingStyle.delete){
pcMgr.pros.remove(at: indexPath.row)
proTable.reloadData()
}
}
}
}
Replace your code with this , you have used old syntax that to inside viewDidLoad function.
import UIKit
class ViewController : UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet var proTable: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
proTable.reloadData()
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell: UITableViewCell = UITableViewCell(style: UITableViewCellStyle.subtitle, reuseIdentifier: "Default Pros")
cell.textLabel?.text = pcMgr.pros[indexPath.row].name
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return pcMgr.pros.count
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath){
if (editingStyle == UITableViewCellEditingStyle.delete){
pcMgr.pros.remove(at: indexPath.row)
proTable.reloadData()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
The syntax for the required UITableViewDataSource mehods are not correct.
Try this:
#available(iOS 2.0, *)
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
<#code#>
}
#available(iOS 2.0, *)
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
<#code#>
}
Because you have already conformed to the protocol, I would recommend using XCode's auto complete on method declarations. Use escape key to see the method declarations.
The correct syntax for the protocol functions in Swift 3
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell ;
return cell
}
Use these methods outside of viewDidLoad method. These methods should be inside your viewDidLoad.
-Remove the functions from viewDidLoad()
-Mention the array
-Add the function "numberOfSections" to the code
hope this helps!
import UIKit
class ViewController: UIViewController , UITableViewDelegate, UITableViewDataSource{
#IBOutlet var proTable: UITableView!
var pcMgr: Array = [] // Or whatever your array is!
override func viewDidLoad() {
super.viewDidLoad()
proTable.reloadData()
}
func numberOfSections(in tableView: UITableView) -> Int {
1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
return pcMgr.pros.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
let cell: UITableViewCell = UITableViewCell(style: UITableViewCellStyle.subtitle, reuseIdentifier: "Default Pros")
cell.textLabel?.text = pcMgr.pros[indexPath.row].name
return cell
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath){
if (editingStyle == UITableViewCellEditingStyle.delete){
pcMgr.pros.remove(at: indexPath.row)
proTable.reloadData()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
I need to delete a row in a section but it deletes the row in upper section. Please help find problems of my codes. Also, please advise how to delete the section when deleting the row? There is one row in a section.
var sectionTitles = [String]()
var savedURLs = [[String]]()
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return savedURLs.count
}
func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return sectionTitles[section]
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return savedURLs[section].count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("SavingCell")
cell?.textLabel!.text = savedURLs[indexPath.section][indexPath.row]
return cell!
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
savedURLs[indexPath.section].removeAtIndex(indexPath.row)
NSUserDefaults.standardUserDefaults().setObject(savedURLs, forKey: Key_SavedURLs)
savingTableView.reloadData()
}
}
To delete empty sections modify your code to this:
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
savedURLs[indexPath.section].removeAtIndex(indexPath.row)
// now check if a section is empty and, if so, delete it
if savedURLs[indexPath.section].count == 0 {
savedURLs.removeAtIndex(indexPath.section)
}
NSUserDefaults.standardUserDefaults().setObject(savedURLs, forKey: Key_SavedURLs)
savingTableView.reloadData()
}
}
although for this to work your savedURLs should be [[String]]
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
savedURLs.removeAtIndex(indexPath.section)
NSUserDefaults.standardUserDefaults().setObject(savedURLs, forKey: Key_SavedURLs)
savingTableView.reloadData()
}
}
try this.this should work..
I have a piece of code here, which seems to be working just fine apart from one little piece.
import UIKit
class FirstViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet var tblTasks: UITableView!
//Returning to view
override func viewWillAppear(animated: Bool) {
tblTasks.reloadData();
}
//UItableViewDataSource
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
return taskMgr.tasks.count
}
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)
}
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
let cell: UITableViewCell = UITableViewCell(style: UITableViewCellStyle.Subtitle, reuseIdentifier: "test")
cell.textLabel?.text = taskMgr.tasks[indexPath.row].name
cell.detailTextLabel?.text = taskMgr.tasks[indexPath.row].desc
return cell
}
}
I have introduced these lines in order to be able to delete rows in the table view
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)
}
}
and what they do is giving me the possibility to swipe rows from right to left, though the row doesn't get deleted.
What would be the best possible way to introduce a DELETE button in this case?
best regards, Vlad
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
//delete row at selected index
numbers.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
}
Here is a cleaned up version for Swift 3.x:
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
// Delete from your source, then update the tableView
numbers.removeAtIndex(indexPath.row)
tableView.deleteRows(at: [indexPath], with: .automatic)
}
}
Check to make sure that the editingStyle is delete before proceeding
Remove the value from your data source (in this case, numbers)
Finally, pass in the indexPath as an array to be deleted, along with the animation you would like (in this case, automatic)
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
yourArray.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
}
I am trying to delete a table view cell using swipe to delete, but I can't use the line I marked in my code, not sure why. My cells are being made by a Dictionary, with the key for the title and the value for the details.
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell
//Create the cell by the dictionary favDict
for (key, value) in favDict{
cell.textLabel?.text = key
cell.detailTextLabel?.text = value
}
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 {
favDict.removeAtIndex(indexPath!.row)// Line that is giving the error says Int is not convertible for [String: String]
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
}
Resolution:
import UIKit
class ViewController2: UIViewController, UITableViewDelegate {
var dictKeys : [String]?
#IBOutlet var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
dictKeys = Array(favDict.keys)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
dictKeys = Array(favDict.keys)
return rowsInSec
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell
var key = dictKeys?[indexPath.row]
var data = favDict[key!]
cell.textLabel?.text = key
cell.detailTextLabel?.text = data
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
{
var key = dictKeys?[indexPath.row]
favDict.removeValueForKey(key!)
dictKeys?.removeAtIndex(indexPath.row)
rowsInSec--
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
}
}
You can't use;
favDict.removeAtIndex(indexPath!.row)
removeAtIndex is a instance method of NSMutableArray. For removing value from dictionary you can use:
favDict.removeValueForKey("yourkey")
EDIT:
The removing and loading data using Dictionary is little bit hard compared to NSMutableArray. Also you put a loop in the cellForRowAtIndexPath: . It'll load only the last object to every cell.
If you are still looking for Dictionary, you can do it like:
Implement the methods like:
var dictKeys : [Strings]?
override func viewDidLoad()
{
super.viewDidLoad()
dictKeys = Array(favDict.keys)
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell
var key = dictKeys?[indexPath.row]
var data = favDict[key!]
cell.textLabel?.text = key
cell.detailTextLabel?.text = data
return cell
}
func tableView(tableView: UITableView!, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath!)
{
if editingStyle == UITableViewCellEditingStyle.Delete
{
var key = dictKeys?[indexPath.row]
favDict.removeValueForKey(key!)
dictKeys?.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
}