title: How to use front camera for barcode scanning in ipod
body: <p>I am using back camera to read bar code data...and it is scanning perfectly.Now I want to use front camera for this...How can I do this? Where should I make change?I have used ZBar bar code reader</p>
  
  <p>my code is:</p>
  
  <pre><code>   - (IBAction) scanButtonTapped
            {
           // ADD: present a barcode reader that scans from the camera feed
              ZBarReaderViewController *reader = [ZBarReaderViewController new];
              reader.readerDelegate = self;
               reader.supportedOrientationsMask = ZBarOrientationMaskAll;
  
                ZBarImageScanner *scanner = reader.scanner;
             // TODO: (optional) additional reader configuration here
  
            // EXAMPLE: disable rarely used I2/5 to improve performance
                 [scanner setSymbology: ZBAR_I25
                 config: ZBAR_CFG_ENABLE
                     to: 0];
  
            // present and release the controller
                 [self presentModalViewController: reader
                           animated: YES];
                 [reader release];
      }
  
          - (void) imagePickerController: (UIImagePickerController*) reader
             didFinishPickingMediaWithInfo: (NSDictionary*) info
              { 
                // ADD: get the decode results
                   id&lt;NSFastEnumeration&gt; results =
                     [info objectForKey: ZBarReaderControllerResults];
                     ZBarSymbol *symbol = nil;
                     for(symbol in results)
                         // EXAMPLE: just grab the first barcode
                            break;
  
                         // EXAMPLE: do something useful with the barcode data
                            resultText.text = symbol.data;
                            bid.text=symbol.data;
  
                         // EXAMPLE: do something useful with the barcode image
                            resultImage.image =
                            [info objectForKey: UIImagePickerControllerOriginalImage];
  
                         // ADD: dismiss the controller (NB dismiss from the *reader*!)
                            [reader dismissModalViewControllerAnimated: YES];
                       }
  </code></pre>