I am building an app in swift which has takes user details like Name, age, gender, picture, About me. I am saving all the data in core data and and displaying it in tableView. It also has a swipe to delete feature. What I want to do is add Swipe to edit feature which takes you to EnterDetail screen and replace the old data. But I don't know how to do it. Suggest me a way to do it. I don't know how to replace data at a specific row of the tableView. I tried using setValues() but it's not working.
ItemTableViewCell
import UIKit
class ItemTableViewCell: UITableViewCell {
@IBOutlet weak var name: UILabel!
@IBOutlet weak var age: UILabel!
@IBOutlet weak var gender: UILabel!
@IBOutlet weak var photoView: UIImageView!
@IBOutlet weak var aboutMe: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
photoView.layer.cornerRadius = photoView.frame.height/2 // For round imageView
photoView.layer.masksToBounds = true
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
FirstViewController
import UIKit
import CoreData
class FirstViewController: UIViewController {
@IBOutlet weak var dataTableView: UITableView!
var data: NSManagedObject? = nil
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
var itemArrayFVC = [Items]()
var flag = 0
lazy var searchBar: UISearchBar = UISearchBar()
var filteredData = [Items]()
var filtered = false
let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "Items")
var editRowIndexPath: IndexPath = []
var editClicked = false
override func viewDidLoad() {
super.viewDidLoad()
navigationItem.titleView = searchBar
searchBar.delegate = self
searchBar.placeholder = "Search"
let tap = UITapGestureRecognizer(target: self, action: #selector(UIInputViewController.dismissKeyboard))
view.addGestureRecognizer(tap)
}
override func viewWillAppear(_ animated: Bool) {
loadItems()
//dataTableView.reloadData()
}
override func viewWillDisappear(_ animated: Bool) {
if editClicked == true {
print("view will disappear")
}
}
@objc func dismissKeyboard() {
//Causes the view (or one of its embedded text fields) to resign the first responder status.
view.endEditing(true)
}
//MARK: - TableView methods
extension FirstViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if !filteredData.isEmpty {
return filteredData.count
}
return filtered ? 0 : itemArrayFVC.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: Constants.cellIdentifier, for: indexPath) as! ItemTableViewCell
let item = itemArrayFVC[indexPath.row]
if !filteredData.isEmpty {
let filterItem = filteredData[indexPath.row]
cell.name.text = filterItem.fName! + " " + filterItem.lName!
cell.age.text = filterItem.dateofbirth
cell.gender.text = filterItem.gender
cell.photoView.image = UIImage(data: filterItem.image!)
cell.aboutMe.text = filterItem.aboutMe ?? "About me"
}
else {
cell.name.text = item.fName! + " " + item.lName!
cell.age.text = item.dateofbirth
cell.gender.text = item.gender
cell.photoView.image = UIImage(data: item.image!)
cell.aboutMe.text = item.aboutMe ?? "About me"
}
return cell
}
// For swipe to delete gesture for deleting from database and tableView
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
context.delete(itemArrayFVC[indexPath.row])
itemArrayFVC.remove(at: indexPath.row)
saveItems()
tableView.reloadData()
}
}
func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
editClicked = true
let editAction = UIContextualAction(style: .normal, title: "Edit") { (action, sourceView, completionHandler) in
self.performSegue(withIdentifier: "toEditScreen", sender: indexPath)
self.editRowIndexPath = indexPath
completionHandler(true)
print(self.editRowIndexPath)
}
editAction.backgroundColor = UIColor.lightGray
let configuration = UISwipeActionsConfiguration(actions: [editAction])
return configuration
}
func loadItems(with request: NSFetchRequest<Items> = Items.fetchRequest()) {
do {
itemArrayFVC = try context.fetch(request)
} catch {
print("Error fetching data from context \(error)")
}
dataTableView.reloadData()
}
func saveItems() {
do {
try context.save()
} catch {
print("Error saving context \(error)")
}
}
}
extension FirstViewController: UISearchBarDelegate {
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
do {
let results = try context.fetch(fetchRequest)
filteredData = results as! [Items]
} catch let error as NSError {
print("Could not fetch \(error)")
}
if let text = searchBar.text {
filterText(text)
}
if searchBar.text?.count == 0 {
loadItems()
DispatchQueue.main.async {
searchBar.resignFirstResponder()
}
}
}
func filterText(_ query: String) {
filteredData.removeAll()
for string in itemArrayFVC {
if (string.fName!).lowercased().starts(with: query.lowercased()) || (string.lName!).lowercased().starts(with: query.lowercased()){
filteredData.append(string)
}
}
dataTableView.reloadData()
filtered = true
}
}
EnterDetailViewController
import UIKit
import CoreData
class EnterDetailsViewController: UIViewController, UINavigationControllerDelegate,
UIImagePickerControllerDelegate {
@IBOutlet weak var fName: UITextField!
@IBOutlet weak var lName: UITextField!
@IBOutlet weak var dobPicker: UITextField!
@IBOutlet var genderButtons: [UIButton]!
@IBOutlet weak var aboutMe: UITextView!
@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var labelLastName: UILabel!
@IBOutlet weak var labelDob: UILabel!
@IBOutlet weak var labelGender: UILabel!
@IBOutlet weak var labelMale: UILabel!
@IBOutlet weak var labelFemale: UILabel!
@IBOutlet weak var labelAboutMe: UILabel!
@IBOutlet weak var btnSelectImage: UIButton!
@IBOutlet weak var btnSave: UIButton!
var itemArray = [Items]()
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
let datePicker = UIDatePicker()
var gender: String = ""
var age:[Int] = []
override func viewDidLoad() {
super.viewDidLoad()
imageView.layer.cornerRadius = imageView.frame.height/2 // For round imageView
imageView.layer.masksToBounds = true
print(FileManager.default.urls(for: .documentDirectory, in: .userDomainMask))
showDatePicker()
self.fName.delegate = self
self.lName.delegate = self
self.dobPicker.delegate = self
labelLastName.isHidden = true
lName.isHidden = true
labelDob.isHidden = true
dobPicker.isHidden = true
labelGender.isHidden = true
genderButtons[0].isHidden = true
labelMale.isHidden = true
genderButtons[1].isHidden = true
labelFemale.isHidden = true
labelAboutMe.isHidden = true
aboutMe.isHidden = true
imageView.isHidden = true
btnSelectImage.isHidden = true
btnSave.isHidden = true
let tap = UITapGestureRecognizer(target: self, action: #selector(UIInputViewController.dismissKeyboard))
view.addGestureRecognizer(tap)
//loadItems()
}
@objc func dismissKeyboard() {
view.endEditing(true)
}
//MARK: - getGender
@IBAction func selectGender(_ sender: UIButton) {
for button in genderButtons {
button.isSelected = false
}
sender.isSelected = true
gender = sender.currentTitle!
print(gender)
}
//MARK: - Image
@IBAction func selectImage(_ sender: UIButton) {
let imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
present(imagePickerController, animated: true, completion: nil)
let actionSheet = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
actionSheet.addAction(UIAlertAction(title: "Camera", style: .default, handler: { (alert:UIAlertAction!) -> Void in
self.showCamera()
}))
actionSheet.addAction(UIAlertAction(title: "Album", style: UIAlertAction.Style.default, handler: { (alert:UIAlertAction!) -> Void in
self.showAlbum()
}))
actionSheet.addAction(UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel, handler: nil))
self.present(actionSheet, animated: true, completion: nil)
}
//To select and display image
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
imageView.image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage
self.dismiss(animated: true, completion: nil) // to dismiss the navigator when the image has been selected.
}
//MARK: - Date
func showDatePicker(){
//Formate Date
datePicker.datePickerMode = .date
//ToolBar
let toolbar = UIToolbar();
toolbar.sizeToFit()
let doneButton = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(donedatePicker));
let spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.flexibleSpace, target: nil, action: nil)
let cancelButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(cancelDatePicker));
toolbar.setItems([doneButton,spaceButton,cancelButton], animated: false)
dobPicker.inputAccessoryView = toolbar
dobPicker.inputView = datePicker
}
@objc func donedatePicker(){
let formatter = DateFormatter()
formatter.dateFormat = "yyyy/MM/dd"
dobPicker.text = formatter.string(from: datePicker.date)
self.view.endEditing(true)
age = getAgeFromDOB(date: dobPicker.text!)
if age[0] < 16 {
showAlert("Age should be above 16")
dobPicker.text = ""
} else {
labelGender.isHidden = false
genderButtons[0].isHidden = false
labelMale.isHidden = false
genderButtons[1].isHidden = false
labelFemale.isHidden = false
labelAboutMe.isHidden = false
aboutMe.isHidden = false
imageView.isHidden = false
btnSelectImage.isHidden = false
btnSave.isHidden = false
}
print(age)
}
@objc func cancelDatePicker(){
self.view.endEditing(true)
}
func getAgeFromDOB(date: String) -> Array<Int> {
let dateFormater = DateFormatter()
dateFormater.dateFormat = "yyyy/MM/dd"
let dateOfBirth = dateFormater.date(from: date)
let calender = Calendar.current
let dateComponent = calender.dateComponents([.year, .month, .day], from:
dateOfBirth!, to: Date())
return [dateComponent.year!, dateComponent.month!, dateComponent.day!]
}
//MARK: - Save button
@IBOutlet weak var save: UIButton!
@IBAction func saveClicked(_ sender: UIButton) {
//let text = fName.text ?? ""
if (fName.text?.isEmpty)! {
showAlert("Enter first name")
}
else if (lName.text?.isEmpty)! {
showAlert("Enter last name")
}
else if (dobPicker.text?.isEmpty)! {
showAlert("Enter D.O.B")
}
else if gender.isEmpty {
showAlert("Choose gender")
}
else {
//save.isEnabled = !text.isEmpty
let newItem = Items(context: context)
newItem.fName = fName.text!
newItem.lName = lName.text!
newItem.dateofbirth = dobPicker.text!
newItem.gender = gender
newItem.image = (imageView.image?.pngData())!
newItem.aboutMe = aboutMe.text!
newItem.age = age
saveItems()
self.navigationController?.popViewController(animated: true)
}
}
//MARK: - Save items function
func saveItems() {
do {
try context.save()
} catch {
print("Error saving context \(error)")
}
}
//MARK: - Alert function
func showAlert(_ titleMessage: String) {
let alert = UIAlertController(title: titleMessage, message: "", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: { action in
print("Tapped OK")
}))
present(alert, animated: true)
}
//MARK: - Camera function
func showCamera() {
if !UIImagePickerController.isSourceTypeAvailable(.camera) {
let alertController = UIAlertController(title: nil, message: "Device has no camera.", preferredStyle: .alert)
let okAction = UIAlertAction(title: "OK", style: .default, handler: { (alert: UIAlertAction!) in
})
alertController.addAction(okAction)
self.present(alertController, animated: true, completion: nil)
} else {
let picker = UIImagePickerController()
picker.sourceType = .camera
//for camera front
// picker.cameraDevice = .front
picker.delegate = self
picker.allowsEditing = false
present(picker, animated: true)
}
}
//MARK: - Album function
func showAlbum() {
let imageController = UIImagePickerController()
imageController.delegate = self
imageController.sourceType = UIImagePickerController.SourceType.photoLibrary
self.present(imageController, animated: true, completion: nil)
print("Select image")
}
}
extension EnterDetailsViewController: UITextFieldDelegate {
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
performAction(textField.tag)
return true
}
func performAction(_ tag: Int) {
switch tag {
case 0:
labelLastName.isHidden = false
lName.isHidden = false
//lName.becomeFirstResponder()
case 1:
labelDob.isHidden = false
dobPicker.isHidden = false
//dobPicker.becomeFirstResponder()
// all other cases of Unhiding labels and text fields is written inside donedatePicker() function
default: break
}
}
}
