Edit Button Difficulties using Swift - swift

Question

I'm new to the coding world. I'm trying to incorporate an edit button. I got the button to show up while the user swipes to the right but I'm having trouble getting the edit button to work. When pressed, it should bring up the table were the user first input the data but with the information already placed in the fields.
For example: user fills in the artist, album and release date, the edit button should take them back to where they first put in the information but with the info already in place.
Here's the code I used for the edit button:
override func tableView(_ tableView: UITableView,
leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration?
{
let modifyAction = UIContextualAction(style: .normal, title: "Update", handler: { (ac:UIContextualAction, view:UIView, success:(Bool) -> Void) in
print("Update action ...")
success(true)
})
modifyAction.title = "Edit"
modifyAction.backgroundColor = .blue
return UISwipeActionsConfiguration(actions: [modifyAction])
}
And here's the code for adding the content:
#IBOutlet var artisttextfield: UITextField!
#IBOutlet var albumtextfield: UITextField!
#IBOutlet var releasedatePicker: UIDatePicker!
override func viewDidLoad() {
super.viewDidLoad()
releasedatePicker.minimumDate = Date()
// Do any additional setup after loading the view, typically from a nib.
}
#IBAction func saveTapped( _ sender: UIBarButtonItem) {
let artist = artisttextfield.text ?? ""
let album = albumtextfield.text ?? ""
let releasedate = releasedatePicker.date
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let context = appDelegate.persistentContainer.viewContext
let newRelease = Release_Date(context: context)
newRelease.artist = artist
newRelease.album = album
newRelease.release_date = releasedate as NSDate?
newRelease.release_dateId = UUID().uuidString
if let uniqueId = newRelease.release_dateId {
print("The freshreleaseId is \(uniqueId)")
}
do {
try context.save()
let message = "\(artist)'s new album \(album) releases Today!"
let content = UNMutableNotificationContent()
content.body = message
content.sound = UNNotificationSound.default()
var dateComponents = Calendar.current.dateComponents([.month, .day],
from: releasedate)
dateComponents.hour = 09
dateComponents.minute = 00
let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents,
repeats: true)
if let identifier = newRelease.release_dateId {
let request = UNNotificationRequest(identifier: identifier,
content: content, trigger: trigger)
let center = UNUserNotificationCenter.current()
center.add(request, withCompletionHandler: nil)
}
} catch let error {
print("Could not save because of \(error).")
}
dismiss(animated: true, completion: nil)
print("Added a Release Date!")
print("Artist: \(newRelease.artist)")
print("Album: \(newRelease.album)")
print("Release Date: \(newRelease.release_date)")
}
#IBAction func cancelTapped(_ sender: UIBarButtonItem) {
dismiss(animated: true, completion: nil)
}
Here's viewWillAppear
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let context = appDelegate.persistentContainer.viewContext
let fetchRequest = Release_Date.fetchRequest() as NSFetchRequest<Release_Date>
let sortDescriptor1 = NSSortDescriptor(key: "album", ascending: true)
let sortDescriptor2 = NSSortDescriptor(key: "artist", ascending: true)
fetchRequest.sortDescriptors = [sortDescriptor1, sortDescriptor2]
do {
freshreleases = try context.fetch(fetchRequest)
} catch let error {
print("Could not fetch because of error: \(error).")
}
tableView.reloadData()
}