zbar freeze while trying open the camera view

Question

I'm using zbar sdk to scan barcodes. The problem is sometimes it freezes while trying to open the camera view. It can takes 1-4 minutes. It is too long and annoying, but sometimes it opens quickly. How can I solve this issue? Thanks.

-(void)barcodeRead
{
    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 presentViewController: reader
                       animated: YES completion:nil];

}

- (void) imagePickerController: (UIImagePickerController*) reader
 didFinishPickingMediaWithInfo: (NSDictionary*) info
{
    // ADD: get the decode results
    id<NSFastEnumeration> results =
    [info objectForKey: ZBarReaderControllerResults];
    ZBarSymbol *symbol = nil;
    for(symbol in results)
        break;
    // EXAMPLE: do something useful with the barcode image
    if(whichbtn==1){pushed=1;
        resultText1.text=symbol.data;
        resultImage1.image= [info objectForKey: UIImagePickerControllerOriginalImage];
    }else{if(whichbtn==2){pushed=1;
        resultText2.text=symbol.data;
        resultImage2.image= [info objectForKey: UIImagePickerControllerOriginalImage];
    }
    }
    // ADD: dismiss the controller (NB dismiss from the *reader*!)
    [reader dismissViewControllerAnimated: YES completion:nil];


}

Answer 1

- (void)viewDidLoad
{
    [super viewDidLoad];

    reader = [ZBarReaderViewController new];
}

//put this line in viewDidLoad method.