Swift3.0仿支付宝二维码扫描效果

本文实例为大家分享了Swift3.0二维码扫描的具体代码，供大家参考，具体内容如下

关键代码

import AVFoundation
//获取摄像设备
let device = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)
do {
  //创建输入,输出流
  let input = try AVCaptureDeviceInput.init(device: device)
  let output = AVCaptureMetadataOutput()
  output.rectOfInterest = CGRect(x: 0.1, y: 0, width: 0.9, height: 1)
  //设置代理,并且在主线程刷新
  output.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
  //初始化链接对象 / 高质量采集率
  session.canSetSessionPreset(AVCaptureSessionPresetHigh)
  session.addInput(input)
  session.addOutput(output)

  //先添加输入输出流,后设置支持的扫码所支持的格式,不然报错如下:Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[AVCaptureMetadataOutput setMetadataObjectTypes:] Unsupported type found - use -availableMetadataObjectTypes'
  //http://stackoverflow.com/questions/31063846/avcapturemetadataoutput-setmetadataobjecttypes-unsupported-type-found
  //设置扫码支持的编码格式
  output.metadataObjectTypes = [AVMetadataObjectTypeQRCode,AVMetadataObjectTypeEAN13Code,AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeCode128Code]

  let layer = AVCaptureVideoPreviewLayer(session: session)
  layer?.videoGravity = AVLayerVideoGravityResizeAspectFill
  layer?.frame = view.layer.bounds
  view.layer.insertSublayer(layer!, at: 0)
  //开始捕捉
  session.startRunning()

} catch let error as NSError {
  print("errorInfo\(error.domain)")
}

/// 实现代理方法
extension ScanCodeController:AVCaptureMetadataOutputObjectsDelegate {
  func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!) {

    if metadataObjects.count > 0 {
      session.stopRunning()
      let object = metadataObjects[0]
      let string: String = (object as AnyObject).stringValue
      if let url = URL(string: string) {
      if UIApplication.shared.canOpenURL(url) {
        //去打开地址链接
        _ = self.navigationController?.popViewController(animated: true)
        UIApplication.shared.open(url)

      } else {
        //获取非链接结果
        let alertViewController = UIAlertController(title: "扫描结果", message: (object as AnyObject).stringValue, preferredStyle: .alert)
        let actionCancel = UIAlertAction(title: "退出", style: .cancel, handler: { (action) in
          _ = self.navigationController?.popViewController(animated: true)
        })
        let actinSure = UIAlertAction(title: "再次扫描", style: .default, handler: { (action) in
          self.session.startRunning()
        })
        alertViewController.addAction(actionCancel)
        alertViewController.addAction(actinSure)
        self.present(alertViewController, animated: true, completion: nil)
      }
      }
    }
  }
}

DEMO效果：

下载地址：DEMO

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

# Swift3.0支付宝二维码扫描 # Swift3.0二维码扫描 # Swift3.0支付二维码扫描 # iOS实现二维码的扫描功能 # IOS生成与读取二维码名片 # IOS笔记061之二维码的生成和扫描 # ios原生二维码扫描 # iOS和Android用同一个二维码实现跳转下载链接的方法 # 如何在iphon IOS设备上使用二维码 # 扫描二维码控件的封装iOS实现 # iOS 条码及二维码扫描（从相册中读取条形码/二维码）及扫码过程中遇到的坑 # iOS 二维码生成及扫码详解及实例代码 # iOS中生成指定大小、指定颜色的二维码和条形码方法详解 # 下载地址 # 高质量 # 报错 # 大家分享 # 具体内容 # 大家多多 # exception # uncaught # due # NSInvalidArgumentException # Unsupported # setMetadataObjectTypes # reason # app # AVCaptureSessionPresetHigh # canSetSessionPreset # session # addInput # Terminating # text

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Swift3.0仿支付宝二维码扫描效果

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