I have an alert in which I have used table view to show some data.
User can select any item from the table view data.
Now when I'm trying to select any item in didSelectRow method it isn't selecting an item. I have used breakpoints also but it isn't catching the breakpoints also.
I have given its delegates and datasources everything is fine but i'm confused why it isn't working?
My code is this:
extension YourOrdersViewController : UITableViewDelegate, UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return PreOrderService.instance.PreOrderModelInstance.count
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("Hello")
print(PreOrderService.instance.PreOrderModelInstance[indexPath.row].perorder_time)
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
if tableView == orderTableView{
print("Dishes")
}
else{
orderTableView.cellForRow(at: indexPath)?.accessoryType = .none
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = orderTableView.dequeueReusableCell(withIdentifier: "orderCell", for: indexPath) as!
PreOrderTableViewCell
cell.titleLbl.text = PreOrderService.instance.PreOrderModelInstance[indexPath.row].perorder_time
print(cell.titleLbl.text!)
cell.selectionStyle = .none
cell.selectionStyle = UITableViewCellSelectionStyle.none
cell.accessoryType = cell.isSelected ? .checkmark : .none
return cell
}
}
View Controller looks like this,
enter image description here
Check or you have set this value:
If No Selection is set instead of Single Selection, the func tableView (_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) method will not be executed.
Does it have any gesture recognizer on your UIViewControlller. If it does and the gesture recognizer is above your table views on responder chain, it will take any single touch and leave nothing for your table views.
Whole problem in your code I think is:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
self.tableView.cellForRow(at: indexPath)?.accessoryType = .checkmark
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
self.tableView.cellForRow(at: indexPath)?.accessoryType = .none
}
In Main.storyboard select your table view and in Attribute inspector change selection to single selection
Make sure that the delegate and datasource are set.
If you're creating the views via storyboard, make sure that you set the iboutlets for delegate/datasource.
Both of these lines mean the same thing: so remove the second one.
cell.selectionStyle = .none
cell.selectionStyle = UITableViewCellSelectionStyle.none
Related
I've implemented checkmarks (when row is selected) with the following code in cellForRowAt:
// Add a checkmark to row when selected
if selectedIngredients.contains(indexPath.row) {
cell.accessoryType = .checkmark
} else {
cell.accessoryType = .none
}
However, when I select a row, that index.row from each section gets the checkmark:
This seems like it could be because I'm only specifying the indexPath.row, but not the section. How can I code this so that only the selected row within the section I selected gets the checkmark?
use data store for save checkmarks like this:
var selectedIngredients: Set<IndexPath> = [] // use set for unique save
then didSelect callBack:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
if self.selectedIngredients.contains(indexPath) {
self.selectedIngredients.remove(indexPath)
} else {
self.selectedIngredients.insert(indexPath)
}
self.tableView.reloadData()
}
after reload in CellForRow:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if selectedIngredients.contains(indexPath) {
cell.accessoryType = .checkmark
} else {
cell.accessoryType = .none
}
}
If you want it to have only one Row contain checkmark:
var selectedIngredients: IndexPath? = nil
and didSelect CallBack:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
self.selectedIngredients = indexPath
}
and finally:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if selectedIngredients == indexPath {
cell.accessoryType = .checkmark
} else {
cell.accessoryType = .none
}
}
you should add checkmarks in didSelect and remove them in didDeselect methods;
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
// update cell here
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
// update cell here
}
also, have a look at this answer; https://stackoverflow.com/a/34962963/13754736
I created Xib file for my uitableviewcell in the attributed inspector i choose SelectionStyle default, but it didn't help me. So and i added accessory type .detailDisclosureButton.
So when i tapped on a cell , My cell doesn't highlighted gray color, only disclosurebutton does
Maybe you can try this one,
extension CWScoreBoardViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
}
}
or you can try this,
extension CWScoreBoardViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CWUsersTableViewCell", for: indexPath) as! CWUsersTableViewCell
cell.selectionStyle = .none
return cell
}
}
My scenario, I am trying to create UITableview single cell checkmark selection and Multiple cell check mark selection. Here, I am trying by below code for single selection check mark but Its reusability not working. Also, I don't know how to do multiple cell selection by clicking cell section.
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
self.tableView.deselectRow(at: indexPath, animated: true)
tableView.cellForRow(at: indexPath)?.accessoryType = .checkmark
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
tableView.cellForRow(at: indexPath)?.accessoryType = .none
}
For reusability, you need a variable to save the selected cell index(or array for cells) and then set the appropriate accessoryType when displaying the cell.
For single selection, remember to clear the previous selection.
A sample pattern for single selection:
var selectedRow = 0
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
selectedRow = indexPath.row
for cell in tableView.visibleCells { //Why not using didDeselectRowAt? Because the default selected row(like row 0)'s checkmark will NOT be removed when clicking another row at very beginning.
cell.accessoryType = .none
}
tableView.cellForRow(at: indexPath)?.accessoryType = .checkmark
}
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
cell.accessoryType = indexPath.row == selectedRow ? .checkmark : .none
}
A pattern for multiple selections (Updated for multi-sections):
var selectedIndexPaths = Set<IndexPath>()
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if selectedIndexPaths.contains(indexPath) { //deselect
selectedIndexPaths.remove(indexPath)
tableView.cellForRow(at: indexPath)?.accessoryType = .none
}
else{
selectedIndexPaths.insert(indexPath) //select
tableView.cellForRow(at: indexPath)?.accessoryType = .checkmark
}
}
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
cell.accessoryType = selectedIndexPaths.contains(indexPath) ? .checkmark : .none
}
Model
class Item {
var name:String!
var isSelected = false
}
then inside cellForRowAt
cell.accessoryType = items[indexPath.row].isSelected ? .checkmark : .none
inside didSelectRowAt
items[indexPath.row].isSelected.toggle()
tableView.reloadRows(at:[indexPath],with:.none)
Set isSingleSelection to false for multiple selections and to true for single selection
var isCellSelected = [Bool]()
var isSingleSelection = false
override func viewDidLoad() {
super.viewDidLoad()
for _ in arrayFillingYourTableview { isCellSelected.append(false) }
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = branchTbView.dequeueReusableCell(withIdentifier: "cell")!
cell.accessoryType = isCellSelected[indexPath.row] ? .checkmark : .none
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if isSingleSelection {
for i in 0..<isBranchSelected.count {
isCellSelected[i] = false
}
}
isCellSelected[indexPath.row] = ! isCellSelected[indexPath.row]
tableView.reloadData()
}
}
I have a tableview implemented. The list shows fine, but I want to detect when the row selection has been changed. I am trying to do a certain action when the row selection is changed, for example, print("row selection has changed ")
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return tableArray.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "exploreCell", for: indexPath)
cell.textLabel?.text = tableArray[indexPath.row]
return cell
}
I hope the question is clear.
You can observer selection state from this 2 delegate methods. So when you select any cell it will call didSelectRowAt delegate method and if you tap on selected cell again it will call didDeselectRowAt
Make sure to set tableView selection property to multiple selection incase if you want user to select multiple cell
tableView.allowsMultipleSelection = true
Swift Delegate methods.
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
//Your code here
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
//Your code here
}
I want implement checkMark in tableView cell but when I select cell then Automatically two checkMark show in cell.
func numberOfSections(in tableView: UITableView) -> Int {
return 2
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if indexPath.section == 0{
tableView.cellForRow(at: indexPath)?.accessoryType = .checkmark
}
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
if indexPath.section == 0{
tableView.cellForRow(at: indexPath)?.accessoryType = .none
//tableView.allowsMultipleSelection = false
}
}
this is my code