Q:

reload table view when Contact Added swift

i used ContactUI FrameWork to fetch ,  Edit , create new Conatacts . there is a table view in VC1 to show contacts , there is another View Controller for edit or create new contacts. the problem it is table view in VC1 Doesnt Update When edit or create Contacts in VC 2 . 
Model : 
class ContactStruct : NSObject {
    let identifier : String
    let thumbnailImageData : UIImage?
    let givenName : String
    let familyName : String
    let phoneNumbers : String
    let emailAddresses : String

    init(identi:String,img:UIImage?,name:String,family:String,phone:String,email:String) {
        self.identifier = identi
        self.thumbnailImageData = img
        self.givenName = name
        self.familyName = family
        self.phoneNumbers = phone
        self.emailAddresses = email
    }
    class func generateModelArray() -> [ContactStruct]{
         let contactStore = CNContactStore()
         var contactsData = [ContactStruct]()

         let key = [CNContactGivenNameKey,CNContactFamilyNameKey,CNContactImageDataKey,CNContactThumbnailImageDataKey,CNContactPhoneNumbersKey,CNContactEmailAddressesKey,CNLabelPhoneNumberMobile] as [CNKeyDescriptor]
         let request = CNContactFetchRequest(keysToFetch: key)
         try? contactStore.enumerateContacts(with: request, usingBlock: { (contact, stoppingPointer) in
             let givenName = contact.givenName
             let familyName = contact.familyName
             let emailAddress = contact.emailAddresses.first?.value ?? ""
             let phoneNumber = contact.phoneNumbers.first?.value.stringValue ?? ""
             let identifier = contact.identifier
            var image : UIImage?
             if contact.thumbnailImageData != nil{
                 image = UIImage(data: contact.thumbnailImageData!)!
             }
             contactsData.append(ContactStruct(identi: identifier, img: image, name: givenName, family: familyName, phone: phoneNumber, email: emailAddress as String))
         })
         return contactsData
     }
}

i reload table view in VC1 in many ways but it doesnt work . when i 
  run again the app table view show the change fine .

method for reload table view in VC1 : 
delegate in VC2 : 
    protocol InsertContactViewControllerDelegate {
        func applyingFor_reloadTableView()
    }

class InsertContactViewController: UIViewController {

var delegate : InsertContactViewControllerDelegate?

    override func viewDidLoad() {
        super.viewDidLoad()
}
   @IBAction func btnUpdate_DidTouch(_ sender: Any) {
        if let delegate = self.delegate {
            delegate.applyingFor_reloadTableView()
        }
        modifyContact(contactIdentifier: stridentifier)
        self.navigationController?.popViewController(animated: true)
    }

in vc1 : 
 class NewContactViewController:UIViewController, 

BackGroundViewControllerDelegate {
   @IBOutlet weak var tblMain: UITableView!

       func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
          let story = UIStoryboard(name: "Main", bundle: nil)
          let vc = story.instantiateViewController(withIdentifier: "InsertContactViewController") as! InsertContactViewController
         vc.delegate = self
          self.navigationController?.pushViewController(vc, animated: true)
       }

      func applyingFor_reloadTableView() {
             self.tblMain.reloadData()
       }

    }

modify Contact Method , i pass Contact Identifier to VC2 for update It  : 
   func modifyContact(contactIdentifier:String) {
        let key = [CNContactGivenNameKey,CNContactFamilyNameKey,CNContactImageDataKey,CNContactThumbnailImageDataKey,CNContactEmailAddressesKey,CNContactPhoneNumbersKey] as [CNKeyDescriptor]
        let contact = try?  contactStore.unifiedContact(withIdentifier: contactIdentifier, keysToFetch: key)

        let mutableContact = contact?.mutableCopy() as! CNMutableContact
        let indexpath0 = IndexPath(row: 0, section: 0)
        let cell = tblInsert.cellForRow(at: indexpath0) as! InsertTableCell0
        let name = cell.txtFirstName.text
        let family = cell.txtLastName.text
        mutableContact.givenName = name!
        mutableContact.familyName = family!
        let indexpath1 = IndexPath(row: 0, section: 1)
        let cell1 = tblInsert.cellForRow(at: indexpath1) as! InsertTableCell1
        let phone : String = cell1.txtPhoneNumber.text!
        mutableContact.phoneNumbers = [CNLabeledValue(label: CNLabelPhoneNumberMobile, value:CNPhoneNumber(stringValue: phone))]
        let indexpath2 = IndexPath(row: 0, section: 2)
        let cell2 = tblInsert.cellForRow(at: indexpath2) as! InsertTableCell2
        let email : String = cell2.txtEmail.text!
        mutableContact.emailAddresses = [CNLabeledValue(label: CNLabelHome, value: email as NSString)]
        let saveRequest = CNSaveRequest()
        saveRequest.update(mutableContact)
        try! contactStore.execute(saveRequest)
    }

A:

you are reloading the VC1 tableView before updating the contact. 
First update the contact and the reload the tableView 
Code : 
 @IBAction func btnUpdate_DidTouch(_ sender: Any) {

        modifyContact(contactIdentifier: stridentifier)
        if let delegate = self.delegate {
            delegate.applyingFor_reloadTableView()
        }
        self.navigationController?.popViewController(animated: true)
    }

 func applyingFor_reloadTableView() {
       tableViewDataSource = ContactStruct.generateModelArray() // used your dataSource variable instead of tableViewDataSource.
       self.tblMain.reloadData()
 }

