ios - 扫描完二维码之后该怎么进行相应的操作？

Question

我用的是ios 自带的avfoundation做的扫描二维码，没用zbar或zxing。
现在扫描是成功了，
我想知道成功了之后的操作怎么做？

Answer 1

• 写代理，写回调函数。

  - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection
  {
      for(AVMetadataObject *current in metadataObjects) {
          if ([current isKindOfClass:[AVMetadataMachineReadableCodeObject class]]
      && [current.type isEqualToString:AVMetadataObjectTypeQRCode]) {
      NSString *scannedResult = [(AVMetadataMachineReadableCodeObject *) current stringValue];
  
          if (_completionBlock) {
          _completionBlock(scannedResult);
          }
  
          if (_delegate && [_delegate respondsToSelector:@selector(reader:didScanResult:)]) {
          [_delegate reader:self didScanResult:scannedResult];
          }
  
          break;
          }
      }
  }