如何使用 swift 从 VCard 检索数据

Question

我正在研究二维码扫描。使用以下 swift 代码，QR 码中的数据将打印在控制台中。

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.
    }
}

输出：

BEGIN:VCARD
VERSION:2.1
FN:John Peter
N:Peter;John
TITLE:Admin
TEL;CELL:+91 431 524 2345
TEL;WORK;VOICE:+91 436 542 8374
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

现在我要的是，具体如何获取VCard格式的数据，比如获取名字，姓氏，email id，手机号码等。之前也问过类似的问题，不过是在 objective-c。我不知道该怎么做 swift 3. 在此先感谢。

Answer 1

这是我使用的 Playground 中的示例代码。这不是最好的，但你会明白的：

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:+91 431 524 2345 \n" +
"TEL;WORK;VOICE:+91 436 542 8374 \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))")
}

CNContactVCardSerialization.contacts(with: data) 的输出是 CNContact (reference) 的数组。

Answer 2

在这里您可以查看 swift 4 of Mateusz Szlosek

的更新答案

 var str = "BEGIN:VCARD \n" +
  "VERSION:2.1 \n" +
  "FN:John Peter \n" +
  "N:Peter;John \n" +
  "TITLE:Admin \n" +
  "TEL;CELL:+91 431 524 2345 \n" +
  "TEL;WORK;VOICE:+91 436 542 8374 \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)
    }
  }
}

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