UIScrollview scaling and swapping at the same time

Yes. You can do it. On each mainScrollView page, add a subScrollView containing the image. You need to do the following.

• Set maximum ZoomScale for subScrollView

  [subScrollView setMaximumZoomScale:2.0f];   // You can set any value
  

  This value is calculated based on the size of the image displayed in the image.

• In viewForZoomingInScrollView: the subScrollView method returns imageView

  - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
  
      return imageView;
  }   
  

• Enable paging in mainScrollView

  mainScrollView.pagingEnabled = YES;
  

  You need to write additional code to handle the paging in mainScrollView.