- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {

        self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0,0, 320, 300)];

        self.mainView=[[UIView alloc] initWithFrame:CGRectMake(0,0,      self.scrollView.frame.size.width, self.scrollView.frame.size.height)];

        self.mainView.backgroundColor = [[UIColor alloc] initWithPatternImage:mapBackgroundPattern]; // Assigned some custom color

        scrollView.delegate=self;

        CGRect scrollViewFrame = self.scrollView.frame;
        CGFloat scaleWidth = scrollViewFrame.size.width / self.scrollView.contentSize.width;
        CGFloat scaleHeight = scrollViewFrame.size.height / self.scrollView.contentSize.height;
        CGFloat minScale = MIN(scaleWidth, scaleHeight);
          self.scrollView.zoomScale = minScale;
        //self.scrollView.minimumZoomScale = 0.1f;
        self.scrollView.maximumZoomScale = 10.0f;
        self.scrollView.contentSize = mainView.frame.size;

        UITapGestureRecognizer *doubleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(scrollViewDoubleTapped:)];
        doubleTapRecognizer.numberOfTapsRequired = 2;
        doubleTapRecognizer.numberOfTouchesRequired = 1;
        [self.scrollView addGestureRecognizer:doubleTapRecognizer];

        [self.scrollView addSubview:self.mainView];
        [self addSubview:self.scrollView];
        [self addSubview:imgView11];
    }
    return self;
}


- (void)centerScrollViewContents {
    CGSize boundsSize = self.scrollView.bounds.size;
    CGRect contentsFrame = self.mainView.frame;

    if (contentsFrame.size.width < boundsSize.width) {
        contentsFrame.origin.x = (boundsSize.width - contentsFrame.size.width) / 2.0f;
    } else {
        contentsFrame.origin.x = 0.0f;
    }

    if (contentsFrame.size.height < boundsSize.height) {
        contentsFrame.origin.y = (boundsSize.height - contentsFrame.size.height) / 2.0f;
    } else {
        contentsFrame.origin.y = 0.0f;
    }
    self.mainView.frame = contentsFrame;
}

- (void)scrollViewDoubleTapped:(UITapGestureRecognizer*)recognizer {
    // Get the location within the image view where we tapped
    CGPoint pointInView = [recognizer locationInView:self.mainView];

    // Get a zoom scale that's zoomed in slightly, capped at the maximum zoom scale specified by the scroll view
    CGFloat newZoomScale = self.scrollView.zoomScale * 1.5f;
    newZoomScale = MIN(newZoomScale, self.scrollView.maximumZoomScale);

    // Figure out the rect we want to zoom to, then zoom to it
    CGSize scrollViewSize = self.scrollView.bounds.size;

    CGFloat w = scrollViewSize.width / newZoomScale;
    CGFloat h = scrollViewSize.height / newZoomScale;
    CGFloat x = pointInView.x - (w / 2.0f);
    CGFloat y = pointInView.y - (h / 2.0f);

    CGRect rectToZoomTo = CGRectMake(x, y, w, h);

    NSLog(@"FloatValues = %f %f %f %f", x, y, w, h);

    [self.scrollView zoomToRect:rectToZoomTo animated:YES];
}
- (UIView*)viewForZoomingInScrollView:(UIScrollView *)scrollView {
    // Return the view that we want to zoom
    return self.mainView;
}

- (void)scrollViewDidZoom:(UIScrollView *)scrollView {
    // The scroll view has zoomed, so we need to re-center the contents
    [self centerScrollViewContents];
}