How to scan barcode in iPhone camera?

Question

I am trying to test the barcode scanner in iPhone application. I have used the following code

   - (void) imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo: (NSDictionary*) info
{
    //  get the decode results
    id<NSFastEnumeration> results = [info objectForKey: ZBarReaderControllerResults];

    ZBarSymbol *symbol = nil;
    for(symbol in results)
        // just grab the first barcode
        break;

    // showing the result on textview
    self.resultLbl.text = symbol.data;

    self.imgViewScan.image = [info objectForKey: UIImagePickerControllerOriginalImage];

    // dismiss the controller
    [reader dismissViewControllerAnimated:YES completion:nil];
}
- (IBAction)scanBtnTapped:(id)sender {

    NSLog(@"Scanning..");
    self.resultLbl.text = @"Scanning..";
    ZBarReaderViewController *codeReader = [ZBarReaderViewController new];
    codeReader.readerDelegate=self;
    codeReader.supportedOrientationsMask = ZBarOrientationMaskAll;

    ZBarImageScanner *scanner = codeReader.scanner;
    [scanner setSymbology: ZBAR_I25 config: ZBAR_CFG_ENABLE to: 0];

    [self presentViewController:codeReader animated:YES completion:nil];  
   }

This code is not working on simulator.

Answer 1

Download the code of barcode scanner

https://github.com/stephenkeep/barcode_scanner