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Swift tableview cell doesn't save the state with different identifier
Custom UITableViewCell changing indexPath While Scrolling?Can I use a single prototype cell in multiple tableViews?UITableViewCell: Dynamic Cell Height by 'Cell Identifier'How to detect tableView cell touched or clicked in swiftTableView not displaying text with JSON data from API callcannot convert value of type [Struct] to type [string] in coercion swiftHow to use a label on a tableview cell only IF an indexPath object is availableNest a UIScrollView in SwiftPutting different custom cell types in a tableviewSwift vertical UICollectionView inside UITableView
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
I am very confused on the reuse of the cells.
I have a table, each cell is a cell with a switch on it. If I toggle a switch I set the background color of that cell to a different color. However every time I scroll these changes don't persist.
I am subclassing UITalbeViewCell to create my own custom cell. Each cell has a different identifier. However when I scroll through the table, whatever changes I made to the cell still doesn't save. I've read similar questions but none of them worked.. Some suggested subclass which I did, some suggested use different identifier which I also did...
Here is the code of my tableview.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let key = Array(dataSource[indexPath.section].keys)[indexPath.row]
let cell = CellWithSwitch.init(style: .subtitle, reuseIdentifier: key)
cell.awakeFromNib()
let val = Array(dataSource[indexPath.section].values)[indexPath.row]
cell.switchView?.addTarget(self, action: #selector(self.switchChanged(_:)), for: .valueChanged)
if let index = key.firstIndex(of: ".")
cell.textLabel?.text = String(key.suffix(from: key.index(index, offsetBy: 1)))
else
cell.textLabel?.text = key;
cell.switchView?.setOn(val, animated: true)
return cell
swift uitableview
asked Mar 25 at 19:48
AnnaAnna
1612 silver badges15 bronze badges
|
show 3 more comments
I am very confused on the reuse of the cells.
I have a table, each cell is a cell with a switch on it. If I toggle a switch I set the background color of that cell to a different color. However every time I scroll these changes don't persist.
I am subclassing UITalbeViewCell to create my own custom cell. Each cell has a different identifier. However when I scroll through the table, whatever changes I made to the cell still doesn't save. I've read similar questions but none of them worked.. Some suggested subclass which I did, some suggested use different identifier which I also did...
Here is the code of my tableview.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let key = Array(dataSource[indexPath.section].keys)[indexPath.row]
let cell = CellWithSwitch.init(style: .subtitle, reuseIdentifier: key)
cell.awakeFromNib()
let val = Array(dataSource[indexPath.section].values)[indexPath.row]
cell.switchView?.addTarget(self, action: #selector(self.switchChanged(_:)), for: .valueChanged)
if let index = key.firstIndex(of: ".")
cell.textLabel?.text = String(key.suffix(from: key.index(index, offsetBy: 1)))
else
cell.textLabel?.text = key;
cell.switchView?.setOn(val, animated: true)
return cell
swift uitableview
asked Mar 25 at 19:48
AnnaAnna
1612 silver badges15 bronze badges
1) Use a subclass 2) Reuse the cell 3) Never callawakeFromNibyourself. 4) You have to save the state of the switch in thedataSource5) Use a callback closure rather than target/action.
– vadian
Mar 25 at 19:59
@vadian subclass of tableviewCell? I am already subclassing it... what is the reuse identifier for if it's still reusing it even with different identifiers?
– Anna
Mar 25 at 20:01
What is the purpose of different identifiers for the same kind of cell?
– vadian
Mar 25 at 20:02
@vadian oh so it's actually for each kind..I thought it meant for each instance.
– Anna
Mar 25 at 20:04
No, it's for each kind. Design the cell in Interface Builder, assign the identifier and usedequeueReusableCell. But the actual issue is that you don't save the state of the switch in the data source and update it incellForRow.
– vadian
Mar 25 at 20:07
|
show 3 more comments
I am very confused on the reuse of the cells.
I have a table, each cell is a cell with a switch on it. If I toggle a switch I set the background color of that cell to a different color. However every time I scroll these changes don't persist.
I am subclassing UITalbeViewCell to create my own custom cell. Each cell has a different identifier. However when I scroll through the table, whatever changes I made to the cell still doesn't save. I've read similar questions but none of them worked.. Some suggested subclass which I did, some suggested use different identifier which I also did...
Here is the code of my tableview.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let key = Array(dataSource[indexPath.section].keys)[indexPath.row]
let cell = CellWithSwitch.init(style: .subtitle, reuseIdentifier: key)
cell.awakeFromNib()
let val = Array(dataSource[indexPath.section].values)[indexPath.row]
cell.switchView?.addTarget(self, action: #selector(self.switchChanged(_:)), for: .valueChanged)
if let index = key.firstIndex(of: ".")
cell.textLabel?.text = String(key.suffix(from: key.index(index, offsetBy: 1)))
else
cell.textLabel?.text = key;
cell.switchView?.setOn(val, animated: true)
return cell
swift uitableview
asked Mar 25 at 19:48
AnnaAnna
1612 silver badges15 bronze badges
I am very confused on the reuse of the cells.
I have a table, each cell is a cell with a switch on it. If I toggle a switch I set the background color of that cell to a different color. However every time I scroll these changes don't persist.
I am subclassing UITalbeViewCell to create my own custom cell. Each cell has a different identifier. However when I scroll through the table, whatever changes I made to the cell still doesn't save. I've read similar questions but none of them worked.. Some suggested subclass which I did, some suggested use different identifier which I also did...
Here is the code of my tableview.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let key = Array(dataSource[indexPath.section].keys)[indexPath.row]
let cell = CellWithSwitch.init(style: .subtitle, reuseIdentifier: key)
cell.awakeFromNib()
let val = Array(dataSource[indexPath.section].values)[indexPath.row]
cell.switchView?.addTarget(self, action: #selector(self.switchChanged(_:)), for: .valueChanged)
if let index = key.firstIndex(of: ".")
cell.textLabel?.text = String(key.suffix(from: key.index(index, offsetBy: 1)))
else
cell.textLabel?.text = key;
cell.switchView?.setOn(val, animated: true)
return cell
swift uitableview
swift uitableview
asked Mar 25 at 19:48
AnnaAnna
1612 silver badges15 bronze badges
asked Mar 25 at 19:48
AnnaAnna
1612 silver badges15 bronze badges
asked Mar 25 at 19:48
AnnaAnna
1612 silver badges15 bronze badges
asked Mar 25 at 19:48
AnnaAnna
1612 silver badges15 bronze badges
asked Mar 25 at 19:48
AnnaAnna
1612 silver badges15 bronze badges
1612 silver badges15 bronze badges
1) Use a subclass 2) Reuse the cell 3) Never callawakeFromNibyourself. 4) You have to save the state of the switch in thedataSource5) Use a callback closure rather than target/action.
– vadian
Mar 25 at 19:59
@vadian subclass of tableviewCell? I am already subclassing it... what is the reuse identifier for if it's still reusing it even with different identifiers?
– Anna
Mar 25 at 20:01
What is the purpose of different identifiers for the same kind of cell?
– vadian
Mar 25 at 20:02
@vadian oh so it's actually for each kind..I thought it meant for each instance.
– Anna
Mar 25 at 20:04
No, it's for each kind. Design the cell in Interface Builder, assign the identifier and usedequeueReusableCell. But the actual issue is that you don't save the state of the switch in the data source and update it incellForRow.
– vadian
Mar 25 at 20:07
|
show 3 more comments
1) Use a subclass 2) Reuse the cell 3) Never callawakeFromNibyourself. 4) You have to save the state of the switch in thedataSource5) Use a callback closure rather than target/action.
– vadian
Mar 25 at 19:59
@vadian subclass of tableviewCell? I am already subclassing it... what is the reuse identifier for if it's still reusing it even with different identifiers?
– Anna
Mar 25 at 20:01
What is the purpose of different identifiers for the same kind of cell?
– vadian
Mar 25 at 20:02
@vadian oh so it's actually for each kind..I thought it meant for each instance.
– Anna
Mar 25 at 20:04
No, it's for each kind. Design the cell in Interface Builder, assign the identifier and usedequeueReusableCell. But the actual issue is that you don't save the state of the switch in the data source and update it incellForRow.
– vadian
Mar 25 at 20:07
1) Use a subclass 2) Reuse the cell 3) Never call
awakeFromNib yourself. 4) You have to save the state of the switch in the dataSource 5) Use a callback closure rather than target/action.– vadian
Mar 25 at 19:59
1) Use a subclass 2) Reuse the cell 3) Never call
awakeFromNib yourself. 4) You have to save the state of the switch in the dataSource 5) Use a callback closure rather than target/action.– vadian
Mar 25 at 19:59
@vadian subclass of tableviewCell? I am already subclassing it... what is the reuse identifier for if it's still reusing it even with different identifiers?
– Anna
Mar 25 at 20:01
@vadian subclass of tableviewCell? I am already subclassing it... what is the reuse identifier for if it's still reusing it even with different identifiers?
– Anna
Mar 25 at 20:01
What is the purpose of different identifiers for the same kind of cell?
– vadian
Mar 25 at 20:02
What is the purpose of different identifiers for the same kind of cell?
– vadian
Mar 25 at 20:02
@vadian oh so it's actually for each kind..I thought it meant for each instance.
– Anna
Mar 25 at 20:04
@vadian oh so it's actually for each kind..I thought it meant for each instance.
– Anna
Mar 25 at 20:04
No, it's for each kind. Design the cell in Interface Builder, assign the identifier and use
dequeueReusableCell. But the actual issue is that you don't save the state of the switch in the data source and update it in cellForRow.– vadian
Mar 25 at 20:07
No, it's for each kind. Design the cell in Interface Builder, assign the identifier and use
dequeueReusableCell. But the actual issue is that you don't save the state of the switch in the data source and update it in cellForRow.– vadian
Mar 25 at 20:07
|
show 3 more comments
1 Answer
1
active
oldest
votes
You can change array value in switchChange action
lets i take array for switch as below:
var arrSwitch = [false,false,false,false,false,false,false,false,false,false]
Below is my cellForRowAt Method
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = tableView.dequeueReusableCell(withIdentifier: "customCell") as! customCell
cell. switchView.setOn(self.arrSwitch[indexPath.row], animated: false)
cell. switchView.tag = indexPath.row
cell. switchView.addTarget(self, action: #selector(self.onSwitchTap(_:)), for: .valueChanged)
return cell
Here is my onSwitchTap Action
@IBAction func onSwitchTap(_ sender: UISwitch)
self.arrSwitch[sender.tag] = !self.arrSwitch[sender.tag]
Now on scroll it will persist last changes you have done.
answered Mar 26 at 7:11
Kaushik MakwanaKaushik Makwana
1,2641 gold badge7 silver badges23 bronze badges
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can change array value in switchChange action
lets i take array for switch as below:
var arrSwitch = [false,false,false,false,false,false,false,false,false,false]
Below is my cellForRowAt Method
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = tableView.dequeueReusableCell(withIdentifier: "customCell") as! customCell
cell. switchView.setOn(self.arrSwitch[indexPath.row], animated: false)
cell. switchView.tag = indexPath.row
cell. switchView.addTarget(self, action: #selector(self.onSwitchTap(_:)), for: .valueChanged)
return cell
Here is my onSwitchTap Action
@IBAction func onSwitchTap(_ sender: UISwitch)
self.arrSwitch[sender.tag] = !self.arrSwitch[sender.tag]
Now on scroll it will persist last changes you have done.
answered Mar 26 at 7:11
Kaushik MakwanaKaushik Makwana
1,2641 gold badge7 silver badges23 bronze badges
add a comment |
You can change array value in switchChange action
lets i take array for switch as below:
var arrSwitch = [false,false,false,false,false,false,false,false,false,false]
Below is my cellForRowAt Method
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = tableView.dequeueReusableCell(withIdentifier: "customCell") as! customCell
cell. switchView.setOn(self.arrSwitch[indexPath.row], animated: false)
cell. switchView.tag = indexPath.row
cell. switchView.addTarget(self, action: #selector(self.onSwitchTap(_:)), for: .valueChanged)
return cell
Here is my onSwitchTap Action
@IBAction func onSwitchTap(_ sender: UISwitch)
self.arrSwitch[sender.tag] = !self.arrSwitch[sender.tag]
Now on scroll it will persist last changes you have done.
answered Mar 26 at 7:11
Kaushik MakwanaKaushik Makwana
1,2641 gold badge7 silver badges23 bronze badges
add a comment |
You can change array value in switchChange action
lets i take array for switch as below:
var arrSwitch = [false,false,false,false,false,false,false,false,false,false]
Below is my cellForRowAt Method
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = tableView.dequeueReusableCell(withIdentifier: "customCell") as! customCell
cell. switchView.setOn(self.arrSwitch[indexPath.row], animated: false)
cell. switchView.tag = indexPath.row
cell. switchView.addTarget(self, action: #selector(self.onSwitchTap(_:)), for: .valueChanged)
return cell
Here is my onSwitchTap Action
@IBAction func onSwitchTap(_ sender: UISwitch)
self.arrSwitch[sender.tag] = !self.arrSwitch[sender.tag]
Now on scroll it will persist last changes you have done.
answered Mar 26 at 7:11
Kaushik MakwanaKaushik Makwana
1,2641 gold badge7 silver badges23 bronze badges
You can change array value in switchChange action
lets i take array for switch as below:
var arrSwitch = [false,false,false,false,false,false,false,false,false,false]
Below is my cellForRowAt Method
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
let cell = tableView.dequeueReusableCell(withIdentifier: "customCell") as! customCell
cell. switchView.setOn(self.arrSwitch[indexPath.row], animated: false)
cell. switchView.tag = indexPath.row
cell. switchView.addTarget(self, action: #selector(self.onSwitchTap(_:)), for: .valueChanged)
return cell
Here is my onSwitchTap Action
@IBAction func onSwitchTap(_ sender: UISwitch)
self.arrSwitch[sender.tag] = !self.arrSwitch[sender.tag]
Now on scroll it will persist last changes you have done.
answered Mar 26 at 7:11
Kaushik MakwanaKaushik Makwana
1,2641 gold badge7 silver badges23 bronze badges
answered Mar 26 at 7:11
Kaushik MakwanaKaushik Makwana
1,2641 gold badge7 silver badges23 bronze badges
answered Mar 26 at 7:11
Kaushik MakwanaKaushik Makwana
1,2641 gold badge7 silver badges23 bronze badges
answered Mar 26 at 7:11
Kaushik MakwanaKaushik Makwana
1,2641 gold badge7 silver badges23 bronze badges
1,2641 gold badge7 silver badges23 bronze badges
add a comment |
add a comment |
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1) Use a subclass 2) Reuse the cell 3) Never call
awakeFromNibyourself. 4) You have to save the state of the switch in thedataSource5) Use a callback closure rather than target/action.– vadian
Mar 25 at 19:59
@vadian subclass of tableviewCell? I am already subclassing it... what is the reuse identifier for if it's still reusing it even with different identifiers?
– Anna
Mar 25 at 20:01
What is the purpose of different identifiers for the same kind of cell?
– vadian
Mar 25 at 20:02
@vadian oh so it's actually for each kind..I thought it meant for each instance.
– Anna
Mar 25 at 20:04
No, it's for each kind. Design the cell in Interface Builder, assign the identifier and use
dequeueReusableCell. But the actual issue is that you don't save the state of the switch in the data source and update it incellForRow.– vadian
Mar 25 at 20:07