I am trying to pass tableview cell data on editing did end to a button. I have been using tags but I keep getting an error nil found. I think this is do to the amount of rows I have (over 500). Anyone know the best way to do this?
The Code below is what I use (tags). It only crashes (returns nil) when I have multiple tableviewcell rows and have to scroll off the page.
func numberOfSections(in tableView: UITableView) -> Int { return 1 }
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return inventoryArray.count }
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let code : String = (inventoryArray[indexPath.row] as AnyObject).value(forKey: "code") as! String
let name : String = (inventoryArray[indexPath.row] as AnyObject).value(forKey: "name") as! String
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! InventoryCell
cell.unitField.tag = indexPath.row
cell.unitField.addTarget(self, action: #selector(Inventory.submit(_:)), for: UIControl.Event.editingDidEnd)
return cell as InventoryCell
}
...
#IBAction func submit(_ sender: UIButton) {
let tag = sender.tag
let cell = tableView.cellForRow(at: IndexPath.init(row: tag, section: 0)) as! InventoryCell
var unitCount = Int(cell.unitField.text!)!
cell.count.text = String (unitCount)
}
Related
I am working on a location-based reminder app. I show all reminders that user created on a table view. I have also UISwitch on every cell. I want that UISwitch disables/enables reminders individually, not all notifications. I couldn't figure it out.
extension MainViewController: UITableViewDataSource{
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 100
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.items?.count ?? 0
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
//let cell = tableView.dequeueReusableCell(withIdentifier: "itemCell", for: indexPath)
let cell = tableView.dequeueReusableCell(withIdentifier: "itemCell", for: indexPath) as! itemTableViewCell
let item = self.items![indexPath.row]
cell.itemTitle?.text = item.itemName
cell.itemSubTitle?.text = item.itemDescription
//switch
let swicthView = UISwitch(frame: .zero)
swicthView.onTintColor = UIColor (named: "DingerBlue")
swicthView.setOn(true, animated: true)
swicthView.tag = indexPath.row
swicthView.addTarget(self, action: #selector(self.SwitchBtn(_:)), for: .valueChanged)
cell.accessoryView = swicthView
let itemToRemove = self.items![indexPath.row]
let notifToRemove: String = itemToRemove.notifID!
return cell
}
#objc func switchDidChanged(_ sender: UISwitch){
print("Switch value is \(sender.isOn)")
if(sender.isOn){
print("on")
UIApplication.shared.registerForRemoteNotifications()
}
else{
print("Off")
UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: [notifToRemove])
}
}
}
I believe your code is not working because cells are reused and actions on specific cells should be handled from the cell class rather than from ViewController. Move this code into the UITableViewCell code.
let swicthView = UISwitch(frame: .zero)
swicthView.onTintColor = UIColor (named: "DingerBlue")
swicthView.setOn(true, animated: true)
swicthView.tag = switchViewTag!
swicthView.addTarget(self, action: #selector(self.SwitchBtn(_:)), for: .valueChanged)
#objc func switchDidChanged(_ sender: UISwitch){
print("Switch value is \(sender.isOn)")
if(sender.isOn){
print("on")
UIApplication.shared.registerForRemoteNotifications()
}
else{
print("Off")
UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: [notifToRemove])
}
}
and add a new property in the UITableViewCell
weak var switchViewTag: Int?
Modify your cellForRowAt delegate method to
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
//let cell = tableView.dequeueReusableCell(withIdentifier: "itemCell", for: indexPath)
let cell = tableView.dequeueReusableCell(withIdentifier: "itemCell", for: indexPath) as! itemTableViewCell
let item = self.items![indexPath.row]
cell.itemTitle?.text = item.itemName
cell.itemSubTitle?.text = item.itemDescription
cell.switchViewTag = indexPath.row
return cell
}
I have an array which i show as dequeueReusableCell, I'd like to show an appropriate image next to the cell. My images are the same name like items in array located in Assets.
How do I show an appropriate image in dequeueReusable cell?
My code:
import UIKit
class Nicosia: UIViewController, UITableViewDelegate, UITableViewDataSource {
let nicosiaPlaces = ["Famagusta Gate", "Laiki Geitonia", "Ledra Street","Omeriye Hamam","Cyprus Museum","Venetian Walls","The House of Hatjigeorgakis Kornessios","Byzantine Art Museum","Archbishop's Palace","Liberty Monument","The Faneromeni Church","Nicosia International Conference Center"]
var identities = ["Famagusta Gate", "Laiki Geitonia", "Ledra Street","Omeriye Hamam","Cyprus Museum","Venetian Walls","The House of Hatjigeorgakis Kornessios","Byzantine Art Museum","Archbishop's Palace","Liberty Monument","The Faneromeni Church","Nicosia International Conference Center"]
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return nicosiaPlaces.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell")
let city = nicosiaPlaces [indexPath.row]
cell?.textLabel?.text = city
//cell.imageCellNicosia?.image = UIImage(named: city)
return cell!
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let vcName = identities[indexPath.row]
let viewController = storyboard?.instantiateViewController(withIdentifier: vcName)
self.navigationController?.pushViewController(viewController!, animated: true)
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
}
If you have a custom table cell class cast this
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as! MyCellClass
cell.imageCellNicosia?.image = UIImage(named: city)
if not use build in imageView property of UITableViewCell
cell.imageView?.image = UIImage(named: city)
I have a Food Items separated by sections and I want to be able to press on the food item and go to a food item detail page. My problem is that I am not able to pass the information to the detail because I am not getting the index of the item in the section.
FoodItem is from coredata.
var allFoodItems = [[FoodItem]]()
var foodItemTypes = [
FoodItemType.Appetizer.rawValue,
FoodItemType.SoupSalad.rawValue,
FoodItemType.Main.rawValue]
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let foodItem = FoodItem()
guard let section = foodItemTypes.index(of: foodItem.type!) else { return }
let row = allFoodItems[section].count
let selectedIndexPath = IndexPath(row: row, section: section)
let foodItemDetailController = FoodItemDetailController()
foodItemDetailController.foodItem = selectedIndexPath
navigationController?.pushViewController(foodItemDetailController, animated: true)
}
You only need to send indexPath directly
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let foodItemDetailController = FoodItemDetailController()
foodItemDetailController.foodItem = indexPath // if IndexPath is the type
navigationController?.pushViewController(foodItemDetailController, animated: true)
}
//
Or send the item clicked
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let all = allFoodItems[indexPath.section]
let item = all[indexPath.row]
let foodItemDetailController = FoodItemDetailController()
foodItemDetailController.foodItem = item // if foodItem is the type
navigationController?.pushViewController(foodItemDetailController, animated: true)
}
I have two custom reusable table view cells in my table view. The first cell, I would like it to be present at all times. The second cell and beyond, are returning a count that is being passed from mysql database.
// return the amount of cell numbers
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return posts.count
}
// cell config
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath.row < 1 {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! InfoCell
//set the data here
return cell
} else {
let Postcell = tableView.dequeueReusableCell(withIdentifier: "PostCell", for: indexPath) as! PostCell
let post = posts[indexPath.row]
let image = images[indexPath.row]
let username = post["user_username"] as? String
let text = post["post_text"] as? String
// assigning shortcuts to ui obj
Postcell.usernameLbl.text = username
Postcell.textLbl.text = text
Postcell.pictureImg.image = image
return Postcell
}
} // end of function
My first cell is there and so are the post.count, but for some reason the posts.count is missing one post and I believe this is because of the first cell. Can anybody help me with this? thanks in advance.
You need to adjust the value returned from numberOfRowsInSection to account for the extra row. And you would need to adjust the index used to access values from your posts array to deal with the extra row.
But a much better solution is to use two sections. The first section should be your extra row and the second section would be your posts.
func numberOfSections(in tableView: UITableView) -> Int {
return 2
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if section == 0 {
return 1
} else {
return posts.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath.section == 0 {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! InfoCell
//set the data here
return cell
} else {
let Postcell = tableView.dequeueReusableCell(withIdentifier: "PostCell", for: indexPath) as! PostCell
let post = posts[indexPath.row]
let image = images[indexPath.row]
let username = post["user_username"] as? String
let text = post["post_text"] as? String
// assigning shortcuts to ui obj
Postcell.usernameLbl.text = username
Postcell.textLbl.text = text
Postcell.pictureImg.image = image
return Postcell
}
}
below code supposed to call usernames from an array and user able to tap on the desired username. call to that array is a success and I can see the usernames but won't able to tap into it. and it don't even print "didSelectRowAt". appreciate your help. thanks.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCell(withIdentifier: "cellIdentifier", for: indexPath) as! MentionUserCell
cell.username!.text = autoComplete[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return autoComplete.count
}
func numberOfSections(in tableView: UITableView) -> Int
{
return 1
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
{
let selectedCell: MentionUserCell = tableView.cellForRow(at: indexPath)! as! MentionUserCell
let selectedWord: String = selectedCell.username!.text! + " "
print("didSelectRowAt")
var string: NSString = NSString(string: self.commentTextView.text!)
string = string.replacingCharacters(in: otoCadang.sharedInstance.foundRange, with: selectedWord) as NSString
// change text field value
commentTextView.text = string as? String
// change cursor position
let positionOriginal = commentTextView.beginningOfDocument
if let cursorLocation: UITextPosition = self.commentTextView.position(from: positionOriginal, offset: otoCadang.sharedInstance.foundRange.location + selectedWord.characters.count)
{
self.commentTextView.selectedTextRange = self.commentTextView.textRange(from: cursorLocation, to: cursorLocation)
}
// remove suggestion
self.autoComplete.removeAll()
self.tableView.reloadData()
tableView.isHidden = true
}
Check List
tableview delegate is set properly
tableview selection mode == No Selection, then change to single selection
function name is correct func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
are you using any tap gesture on this view? remove it.
If you are editing UITextView will can't call to `didselectRowAt. Try to get the Your MentionUserCell, IndexPath in UITextView's methods and handle there. Example:
func textViewDidChange(_ textView: UITextView) {
var parentView = textView as UIView
while !(parentView is UITableViewCell) {
parentView = parentView.superview!
}
if let cell: MentionUserCell = parentView as? MentionUserCell {
if let indexPath = self.tableView.indexPath(for: cell) {
let yourIndexPath = indexPath
}
}
//your code
}
Hope it will help you.
When are using two or more cells the didSelectRow method is not working Well. You can use a button in cell.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cellIdentifierName", for: indexPath) as! MentionUserCell
cell.username!.text = autoComplete[indexPath.row]
let button = cell.viewWithTag(101) as! UIButton
button.cellclick.addTarget(self, action: #selector(functionName(sender:)), for: .touchDown)
return cell
}
Now you get the indexPath:-
func functionName(sender:UIButton) {
let buttonPosition:CGPoint = sender.convert(CGPoint.zero, to:self.tableview)
let indexPath = self.tableview.indexPathForRow(at: buttonPosition)
print(indexPath.row)
}