how can I use a variable from another function swift? - ios

Question

I have a variable by the name of email in the contact picker function. I am trying to use that variable in the IBAction function for the MFMailComposeViewController. I want to apply it to toRecipient. How would I go about using a variable from another function?
import UIKit
import Contacts
import ContactsUI
import MessageUI
class ViewController: UIViewController, CNContactPickerDelegate, MFMailComposeViewControllerDelegate, UITextFieldDelegate {
//Message Setup
#IBOutlet weak var nameTextField: UITextField!
#IBOutlet weak var companyTextField: UITextField!
#IBOutlet weak var lblDetails: UILabel!
#IBAction func btnSelectEmployee(_ sender: Any) {
let entityType = CNEntityType.contacts
let authStatus = CNContactStore.authorizationStatus(for: entityType)
if authStatus == CNAuthorizationStatus.notDetermined {
let contactStore = CNContactStore.init()
contactStore.requestAccess(for: entityType, completionHandler: { (success, nil) in
if success {
self.openContacts()
}
else {
print("Not Authorized")
}
})
}
else if authStatus == CNAuthorizationStatus.authorized {
self.openContacts()
}
}
func openContacts() {
let contactPicker = CNContactPickerViewController.init()
contactPicker.delegate = self
self.present(contactPicker, animated: true, completion: nil)
}
func contactPickerDidCancel(_ picker: CNContactPickerViewController) {
picker.dismiss(animated: true) {
}
}
func contactPicker(_ picker: CNContactPickerViewController, didSelect contact: CNContact) {
//When user select any contact
let fullName = "\(contact.givenName) \(contact.familyName)"
var email = "Not Available"
if !contact.emailAddresses.isEmpty {
let emailString = (((contact.emailAddresses[0] as AnyObject).value(forKey: "labelValuePair") as AnyObject).value(forKey: "value"))
email = emailString! as! String
self.lblDetails.text = "\(fullName)\n \(email)"
}
}
//Mail View
#IBAction func sendAction(_ sender: Any) {
let mailVC = MFMailComposeViewController()
mailVC.mailComposeDelegate = self
mailVC.setSubject("Hello. You have a visitor in the lobby.")
let mailContent = "\(nameTextField.text!) from \(companyTextField.text!) is here to see you."
mailVC.setMessageBody(mailContent, isHTML: false)
let toRecipient = "somebody5555555#gmail.com"
mailVC.setToRecipients([toRecipient])
self.present(mailVC, animated: true) {
self.nameTextField.text = ""
self.companyTextField.text = ""
}
}
func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {
controller.dismiss(animated: true, completion: nil)
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
nameTextField.resignFirstResponder()
companyTextField.resignFirstResponder()
return true
}
}

Answer 1

Define the var outside the function
var email = "Not Available"
func contactPicker(_ picker: CNContactPickerViewController, didSelect contact: CNContact) {
//When user select any contact
let fullName = "\(contact.givenName) \(contact.familyName)"
if !contact.emailAddresses.isEmpty {
let emailString = (((contact.emailAddresses[0] as AnyObject).value(forKey: "labelValuePair") as AnyObject).value(forKey: "value"))
email = emailString! as! String
self.lblDetails.text = "\(fullName)\n \(email)"
}
}
Now you can use the variable inside your class wherever you want.
To get more basics, read documentation Apple Documentation