ios swift3.0实现二维码扫描、生成、识别示例代码

基于swift3.0

1.扫描二维码

设置扫描会话,图层和输入输出

  //设置捕捉设备
    let device = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)

    do
    {
      //设置设备输入输出
      let input = try AVCaptureDeviceInput(device: device)

      let output = AVCaptureMetadataOutput()
      output.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)

      //设置会话
      let scanSession = AVCaptureSession()
      scanSession.canSetSessionPreset(AVCaptureSessionPresetHigh)

      if scanSession.canAddInput(input)
      {
        scanSession.addInput(input)
      }

      if scanSession.canAddOutput(output)
      {
        scanSession.addOutput(output)
      }

      //设置扫描类型(二维码和条形码)
      output.metadataObjectTypes = [
      AVMetadataObjectTypeQRCode,
      AVMetadataObjectTypeCode39Code,
      AVMetadataObjectTypeCode128Code,
      AVMetadataObjectTypeCode39Mod43Code,
      AVMetadataObjectTypeEAN13Code,
      AVMetadataObjectTypeEAN8Code,
      AVMetadataObjectTypeCode93Code]

      //预览图层
      let scanPreviewLayer = AVCaptureVideoPreviewLayer(session:scanSession)
      scanPreviewLayer?.videoGravity = AVLayerVideoGravityResizeAspectFill
      scanPreviewLayer?.frame = view.layer.bounds

      view.layer.insertSublayer(scanPreviewLayer!, at: 0)

      //自动对焦
      if (device?.isFocusModeSupported(.autoFocus))!
      {
        do { try input.device.lockForConfiguration() } catch{ }
        input.device.focusMode = .autoFocus
        input.device.unlockForConfiguration()
      }

      //设置扫描区域
      NotificationCenter.default.addObserver(forName: NSNotification.Name.AVCaptureInputPortFormatDescriptionDidChange, object: nil, queue: nil, using: {[weak self] (noti) in
          output.rectOfInterest = (scanPreviewLayer?.metadataOutputRectOfInterest(for: self!.scanPane.frame))!
      })

      //保存会话
      self.scanSession = scanSession

    }
    catch
    {
      //摄像头不可用

      Tool.confirm(title: "温馨提示", message: "摄像头不可用", controller: self)

      return
    }

    if !scanSession.isRunning
    {
      scanSession.startRunning()
    }

//扫描捕捉完成
extension ScanCodeViewController : AVCaptureMetadataOutputObjectsDelegate
{

  func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!)
  {

    //停止扫描
    self.scanLine.layer.removeAllAnimations()
    self.scanSession!.stopRunning()

    //播放声音
    Tool.playAlertSound(sound: "noticeMusic.caf")

    //扫完完成
    if metadataObjects.count > 0
    {

      if let resultObj = metadataObjects.first as? AVMetadataMachineReadableCodeObject
      {

        Tool.confirm(title: "扫描结果", message: resultObj.stringValue, controller: self,handler: { (_) in
          //继续扫描
          self.startScan()
        })

      }

    }

  }

}

								 
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