blocking phone number in call kit - ios

Question

I'm trying to using CallKit to add a feature to my app to add some phone numbers to blacklist!
the code below is my whole view!!
class BlacklistViewController: UIViewController ,UITableViewDataSource, UITableViewDelegate {
var phoneNumbersArrCoreData = [BlockedPhoneNumbers]()
var listPhoneNumbers:[CXCallDirectoryPhoneNumber] = []
#IBOutlet weak var TableView: UITableView!
#IBOutlet weak var BtnAddO: UIButton!
#IBOutlet weak var EntPhonenumber: UITextField!
#IBAction func BtnAddA(_ sender: Any) {
if !(EntPhonenumber.text?.isEmpty)!
{
let blackedPhonenumbers_CoreData = BlockedPhoneNumbers(context: PersistanceService.context)
blackedPhonenumbers_CoreData.phoneNumber = Int64.init(EntPhonenumber.text!)!
PersistanceService.saveContext()
getCoreData()
TableView.reloadData()
}
}
var coreData = [BlockedPhoneNumbers]()
func getCoreData()
{
listPhoneNumbers.removeAll()
let fetchRequest : NSFetchRequest<BlockedPhoneNumbers> = BlockedPhoneNumbers.fetchRequest()
do
{
let FetchedResultFromDB = try PersistanceService.context.fetch(fetchRequest)
coreData = FetchedResultFromDB
print("============\n===========\n")
if coreData.count > 0
{
for i in 0..<coreData.count
{
listPhoneNumbers.append(coreData[i].phoneNumber)
}
}
print("============\n===========\n")
}
catch{
print("gettin blocked number from db got error")
}
}
override func viewDidLoad() {
BtnAddO.layer.cornerRadius = 5
BtnAddO.layer.borderColor = UIColor.white.cgColor
BtnAddO.layer.borderWidth = 0.8
EntPhonenumber.attributedPlaceholder = NSAttributedString(string: "Enter a phone number to block",attributes: [NSAttributedString.Key.foregroundColor: UIColor.lightText])
getCoreData()
super.viewDidLoad()
view.backgroundColor = UIColor.init(red: 25/255, green: 28/255, blue: 46/255, alpha: 1)
TableView.delegate = self
TableView.dataSource = self
}
func beginRequest(with context: CXCallDirectoryExtensionContext) {
getCoreData()
let blockedPhoneNumbers: [CXCallDirectoryPhoneNumber] = listPhoneNumbers
for phoneNumber in blockedPhoneNumbers.sorted(by: <) {
context.addBlockingEntry(withNextSequentialPhoneNumber: phoneNumber)
}
context.completeRequest()
}
//MARK: - TableView
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return listPhoneNumbers.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "BlackListCell") as? BlackListTableViewCell
cell?.ContactImg.layer.masksToBounds = true
cell?.mainView.layer.cornerRadius = 10
cell?.mainView.backgroundColor = UIColor(red: 42/255, green: 48/255, blue: 66/255, alpha: 1)
cell?.ContactImg.layer.cornerRadius = 5
cell?.ContactImg.image = UIImage(named: "Blocked")
cell?.unBlock.imageView?.image = nil
cell?.unBlock.setTitle("UNBLOCK", for: UIControl.State.normal)
cell?.unBlock.layer.cornerRadius = (cell?.unBlock.frame.size.height)!/2
cell?.SetUnblockBtn {
I get the error here,below
let context:NSManagedObjectContext = PersistanceService.context
context.delete(self.phoneNumbersArrCoreData[indexPath.row] as NSManagedObject)
self.phoneNumbersArrCoreData.remove(at: indexPath.row)
print("data deleted!!!")
}
cell?.phoneNumber.text = String(listPhoneNumbers[indexPath.row])
return cell!
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 85
}
}
to explain the code, I save each number that user will enter in a core data(entityName: BlockedPhoneNumbers). I'm not sure even if this is the right way to save numbers that they need to be blocked or not!!
when the user presses the button I save the number and it works fine( but I'm not sure if this is the right way or not!!).
and in getCoreData I get the core data and show them in a table view. which shows that core data works fine! but when user wanna unblock the contact and presses the button in CELL of the table view, I get an error and app crash and it says:
Thread 1: Fatal error: Index out of range
my problems are:
why do I get this error?
2.as I can not find any tutorial for callKit I believe that I'm doing this job wrong.
could anyone help me with this?

Answer 1

You have too many arrays:
listPhoneNumbers which contains your integer numbers
coreData which contains your Core Data items
phoneNumbersArrCoreData which could contain your Core Data items, but you don't add anything to it.
As a result, phoneNumbersArrCoreData is empty. When you try and remove an object from the empty array you get an array bounds exception.
You should eliminate two of the three arrays.
class BlacklistViewController: UIViewController ,UITableViewDataSource, UITableViewDelegate {
var blockedNumbers = [BlockedPhoneNumbers]()
#IBOutlet weak var TableView: UITableView!
#IBOutlet weak var BtnAddO: UIButton!
#IBOutlet weak var EntPhonenumber: UITextField!
#IBAction func BtnAddA(_ sender: Any) {
if !(EntPhonenumber.text?.isEmpty)!
{
let blackedPhonenumbers_CoreData = BlockedPhoneNumbers(context: PersistanceService.context)
blackedPhonenumbers_CoreData.phoneNumber = Int64.init(EntPhonenumber.text!)!
PersistanceService.saveContext()
getCoreData()
TableView.reloadData()
}
}
func getCoreData()
{
let fetchRequest : NSFetchRequest<BlockedPhoneNumbers> = BlockedPhoneNumbers.fetchRequest()
do
{
let FetchedResultFromDB = try PersistanceService.context.fetch(fetchRequest)
blockedNumbers = FetchedResultFromDB
print("============\n===========\n")
}
catch{
print("gettin blocked number from db got error")
}
}
override func viewDidLoad() {
BtnAddO.layer.cornerRadius = 5
BtnAddO.layer.borderColor = UIColor.white.cgColor
BtnAddO.layer.borderWidth = 0.8
EntPhonenumber.attributedPlaceholder = NSAttributedString(string: "Enter a phone number to block",attributes: [NSAttributedString.Key.foregroundColor: UIColor.lightText])
getCoreData()
super.viewDidLoad()
view.backgroundColor = UIColor.init(red: 25/255, green: 28/255, blue: 46/255, alpha: 1)
TableView.delegate = self
TableView.dataSource = self
}
//MARK: - TableView
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return blockedNumbers.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "BlackListCell") as? BlackListTableViewCell
cell?.ContactImg.layer.masksToBounds = true
cell?.mainView.layer.cornerRadius = 10
cell?.mainView.backgroundColor = UIColor(red: 42/255, green: 48/255, blue: 66/255, alpha: 1)
cell?.ContactImg.layer.cornerRadius = 5
cell?.ContactImg.image = UIImage(named: "Blocked")
cell?.unBlock.imageView?.image = nil
cell?.unBlock.setTitle("UNBLOCK", for: UIControl.State.normal)
cell?.unBlock.layer.cornerRadius = (cell?.unBlock.frame.size.height)!/2
cell?.SetUnblockBtn {
let context:NSManagedObjectContext = PersistanceService.context
context.delete(self.blockedNumbers[indexPath.row] as NSManagedObject)
self.phoneNumbersArrCoreData.remove(at: indexPath.row)
print("data deleted!!!")
}
cell?.phoneNumber.text = blockedNumbers[indexPath.row].phoneNumber
return cell!
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 85
}
}
The code to actually load data into the Call Kit block list needs to go into a CallKit extension in your app. You will need to use an application group to share the Core Data store with the extension.