ZBarReader Scans Only UPC_A format in iOS 6

Question

I am developing BarCode reader app in iOS 6,

I am using ZBar sdk, i developed app using this Tutorial.. when i scans any barcode it scans only product of UPC format, but it doesn't scans the product of any other format like EAN_13 or Code_128 etc..

Here is my code snippet,

- (IBAction) scanButtonTapped
{

    ZBarReaderViewController *reader = [ZBarReaderViewController new];
    reader.readerDelegate = self;
    reader.supportedOrientationsMask = ZBarOrientationMaskAll;

    ZBarImageScanner *scanner = reader.scanner;

    [scanner setSymbology: ZBAR_I25
                   config: ZBAR_CFG_ENABLE
                       to: 0];

    [self presentViewController:reader animated:YES completion:nil];

}

- (void) imagePickerController: (UIImagePickerController*) reader
 didFinishPickingMediaWithInfo: (NSDictionary*) info
{
    id<NSFastEnumeration> results =
    [info objectForKey: ZBarReaderControllerResults];
    ZBarSymbol *symbol = nil;
    for(symbol in results)
        break;

    NSLog(@"symbol.data=%@",symbol.data);

    [reader dismissViewControllerAnimated:YES completion:nil];

}

How to scan product of all type ? any idea ?

Answer 1

From the Zbar FAQs

The ZBar decoder enables only EAN-13 by default

and

The UPC-A symbology is the subset of EAN-13 that starts with a leading 0... You can choose to receive the 12-digit results instead by explicitly enabling UPC-A.

It sounds like EAN 13 is enabled. To enable Code 128, put the following snippet after you disable Interleaved 2 of 5 (I25)

[scanner setSymbology: ZBAR_CODE128
     config: ZBAR_CFG_ENABLE
     to: 1];

If you want strict control over what is enabled and disabled, disable all symbologies and selectively enable the ones you want

// Disable all symbologies
[scanner setSymbology: 0
     config: ZBAR_CFG_ENABLE
     to: 0];
// Enable EAN 13
[scanner setSymbology: ZBAR_EAN13
     config: ZBAR_CFG_ENABLE
     to: 1];
// Enable UPC-A
[scanner setSymbology: ZBAR_UPCA
     config: ZBAR_CFG_ENABLE
     to: 1];
// Enable Code 128
[scanner setSymbology: ZBAR_CODE128
     config: ZBAR_CFG_ENABLE
     to: 1]