Customization of scanning page in zbar application - iphone

Question

I am working on an application that scans the QR codes.When the scan button is clicked,it goes to the generic full page camera view.But i need to customize that page so that a logo must be shown at the bottom and a button at the top.the scanning area should be in between these two.How can i implement the?anyone have answer?the code i am using is given below
- (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;
[scanner setSymbology: ZBAR_I25
config: ZBAR_CFG_ENABLE
to: 0];
// present and release the controller
[self presentModalViewController: reader
animated: YES];
[reader release];
}

Answer 1

You can set property cameraOverlayView of ZBarReaderViewController. Some docs is here.
ZBarReaderViewController* reader = [[ZBarReaderViewController alloc] init];
reader.cameraOverlayView = yourCustomView;
To change tabBar you can add your subview.
You can access it using this:
UIView* subView1 = [reader.view.subviews objectAtIndex:2];
UIView* tabBar = [subView1.subviews objectAtIndex:0];
Now you can customize tabBar in the way you like.