How to retrieve data from VCard using swift - xcode

Question

I'm working on QR code scanning. Using the following swift code, the data in the QR code is getting printed in the console.
import UIKit
import AVFoundation
class ViewController: UIViewController, AVCaptureMetadataOutputObjectsDelegate
{
let session = AVCaptureSession()
#IBOutlet weak var square: UIImageView!
var video = AVCaptureVideoPreviewLayer()
override func viewDidLoad()
{
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!) {
if metadataObjects != nil && metadataObjects.count != 0
{
if let object = metadataObjects[0] as? AVMetadataMachineReadableCodeObject
{
if object.type == AVMetadataObjectTypeQRCode
{
print(object.stringValue)
let alert = UIAlertController(title: "QR Code", message: object.stringValue, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Okey", style: .default, handler: nil))
/* alert.addAction(UIAlertAction(title: "Copy", style: .default, handler: { (nil) in
UIPasteboard.general.string = object.stringValue
}))
*/
present(alert, animated: true, completion: nil)
if metadataObjects.count > 0
{
print("-------------------------------------------------")
self.session.stopRunning()
}
}
}
}
}
#IBAction func startButton(_ sender: Any)
{
// Creating session
// let session = AVCaptureSession()
// Define capture device
let captureDevice = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)
do {
let input = try AVCaptureDeviceInput(device: captureDevice)
session.addInput(input)
} catch {
print("Error")
}
let output = AVCaptureMetadataOutput()
session.addOutput(output)
output.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
output.metadataObjectTypes = [AVMetadataObjectTypeQRCode]
video = AVCaptureVideoPreviewLayer(session: session)
video.frame = view.layer.bounds
view.layer.addSublayer(video)
self.view.bringSubview(toFront: square)
session.startRunning()
}
override func didReceiveMemoryWarning()
{
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
OUTPUT:
BEGIN:VCARD
VERSION:2.1
FN:John Peter
N:Peter;John
TITLE:Admin
TEL;CELL:[phone]
TEL;WORK;VOICE:[phone]
EMAIL;WORK;INTERNET:John#ommail.in
URL:www.facebook.com
ADR;WORK:;;423 ofce sales Center;Newark;DE;3243;USA
ORG:xxx Private limited
END:VCARD
Now what I want is, how to retrieve the data in the VCard format specifically, like getting first name, last name, email id, mobile number, etc. A similar question to this is asked before, but it was in objective-c. I don't know how to do this swift 3. Thanks in advance.

Answer 1

Here's a sample code from Playground I used. It's not the best, but You'll get the idea:
import UIKit
import Contacts
var str = "BEGIN:VCARD \n" +
"VERSION:2.1 \n" +
"FN:John Peter \n" +
"N:Peter;John \n" +
"TITLE:Admin \n" +
"TEL;CELL:[phone] \n" +
"TEL;WORK;VOICE:[phone] \n" +
"EMAIL;WORK;INTERNET:John#ommail.in \n" +
"URL:www.facebook.com \n" +
"ADR;WORK:;;423 ofce sales Center;Newark;DE;3243;USA \n" +
"ORG:xxx Private limited \n" +
"END:VCARD"
if let data = str.data(using: .utf8) {
let contacts = try CNContactVCardSerialization.contacts(with: data)
let contact = contacts.first
print("\(String(describing: contact?.familyName))")
}
The output from CNContactVCardSerialization.contacts(with: data) is an array of CNContact (reference).

Answer 2

Here you can check Updated answer for swift 4 of Mateusz Szlosek
var str = "BEGIN:VCARD \n" +
"VERSION:2.1 \n" +
"FN:John Peter \n" +
"N:Peter;John \n" +
"TITLE:Admin \n" +
"TEL;CELL:[phone] \n" +
"TEL;WORK;VOICE:[phone] \n" +
"EMAIL;WORK;INTERNET:John#ommail.in \n" +
"URL:www.facebook.com \n" +
"ADR;WORK:;;423 ofce sales Center;Newark;DE;3243;USA \n" +
"ORG:xxx Private limited \n" +
"END:VCARD"
func fectchContact(){
if let data = str.data(using: .utf8) {
do{
let contacts = try CNContactVCardSerialization.contacts(with: data)
let contact = contacts.first
print("\(String(describing: contact?.familyName))")
}
catch{
// Error Handling
print(error.localizedDescription)
}
}
}