Array of Images display in UIScrollview and Paging successfully but cannot properly zoom-in images in scrollview

Question

I am working on UIScrollview with ImageArray. Scrolling and paging are working but I not able to zoom each image. My code of image Scrollview is below :-

#define I

Answer 1

#define IMAGE_FOR_ZOOM_TAG (1)

Call following custom method

-(void) setupProductImageViewContainerUI
{
    UIWindow *window = [[[UIApplication sharedApplication] delegate] window];

    if(self.dimView)
    {
        for(UIView *subView in self.dimView.subviews)
            [subView removeFromSuperview];
        [self.dimView removeFromSuperview]; self.dimView = nil;
    }

    self.dimView = [[UIView alloc] initWithFrame:window.bounds];
    self.dimView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:.5];
    self.dimView.userInteractionEnabled = YES;
    [window addSubview:self.dimView];

    self.imgContainerView = [[UIView alloc] init];
    self.imgContainerView.frame = CGRectMake(0, 0, window.frame.size.width, window.frame.size.height);
    self.imgContainerView.backgroundColor = [UIColor whiteColor];
    [self.dimView addSubview:self.imgContainerView];

    UIScrollView *mainScrollView = [[UIScrollView alloc] initWithFrame:window.bounds];
    mainScrollView.pagingEnabled = YES;
    mainScrollView.delegate = self;
    mainScrollView.showsHorizontalScrollIndicator = NO;
    mainScrollView.showsVerticalScrollIndicator = NO;
    [self.imgContainerView addSubview:mainScrollView];
    CGRect innerScrollFrame = mainScrollView.bounds;

    IndexOfSlidingPhoto = 0;
    for(int i = 0 ; i < listOfImages.count; i++)
    {
        UIImage *imgProduct = [GeneralClass getImageForSreenFromScreenTable:@"" orCustomTable:@"" OrDefaultImga:[listOfImages objectAtIndex:i]];
        UIImageView *imageForZooming = [[UIImageView alloc] initWithImage:imgProduct];
        imageForZooming.frame = CGRectMake(0, 0, window.frame.size.width, window.frame.size.height);
        imageForZooming.tag = IMAGE_FOR_ZOOM_TAG;
        imageForZooming.contentMode = UIViewContentModeScaleAspectFit;

        UIScrollView *pageScrollView = [[UIScrollView alloc] initWithFrame:innerScrollFrame];
        pageScrollView.minimumZoomScale = 1.0f;
        pageScrollView.maximumZoomScale = 20;
        pageScrollView.zoomScale = 1.0f;
        pageScrollView.contentSize = imageForZooming.bounds.size;
        pageScrollView.delegate = self;
        pageScrollView.showsHorizontalScrollIndicator = NO;
        pageScrollView.showsVerticalScrollIndicator = NO;
        [pageScrollView addSubview:imageForZooming];        
        [mainScrollView addSubview:pageScrollView];

        if (i < listOfImages.count -1)
            innerScrollFrame.origin.x += innerScrollFrame.size.width;

    mainScrollView.contentSize = CGSizeMake(innerScrollFrame.origin.x + innerScrollFrame.size.width, mainScrollView.bounds.size.height);


    [window bringSubviewToFront:self.dimView];
}

#pragma Mark -
#pragma Mark - UIScrollView Delegate Methods

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
    return [scrollView viewWithTag:IMAGE_FOR_ZOOM_TAG];
}