Scan line indicator for ZBar overlays

gistfile1.m

- (UIView *) loadCameraOverlayView
{
    NSString *nibName = @"CameraOverlayView";
    NSArray *loadedObjects = [[NSBundle mainBundle] loadNibNamed:nibName owner:nil options:nil];
    UIView *overlayView = [loadedObjects lastObject];
    overlayView.backgroundColor = [UIColor clearColor];

    UIImageView *imageView = (UIImageView*)[overlayView viewWithTag:2];

    UIImage *image = [UIImage imageNamed:"red_neon_line_320x10.png"];
    imageView.image = image;

    [UIView animateWithDuration:1.5
                          delay:0.0
                        options:(UIViewAnimationOptionRepeat |
                                 UIViewAnimationOptionAutoreverse |
                                 UIViewAnimationOptionAllowUserInteraction)
                     animations:^{
                         imageView.center = CGPointMake(imageView.center.x, imageView.center.y + 280);
                     }
                     completion:^(BOOL finished){
                     }
    ];

    //...
}