如何使用swift从VCard检索数据

Question

我正在进行QR码扫描。使用以下swift代码，QR代码中的数据将被打印到控制台中。

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. 
    } 
} 

OUTPUT：

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，如何具体检索vCard格式的数据，喜欢把自己的名字，姓氏，电子邮件ID，手机号码等。以前有人问过类似的问题，但它是在Objective-C中。我不知道如何做到这一点3.预先感谢。

Answer 1

下面是我使用的Playground的示例代码。这不是最好的，但你会得到的想法：

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))") 
} 

从CNContactVCardSerialization.contacts(with: data)输出是CNContact（reference）阵列。

Answer 2

在这里，您可以检查更新的答案Mateusz Szlosek雨燕4

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) 
    } 
    } 
}