When the app load the epub file first time and the app load the chapter 5（or other chapters） at the first time, sometimes it get the wrong pagesInCurrentSpineCount(this is wrong : totalWidtht == webView.bounds.size.width, pagesInCurrentSpineCount == 1), the pagesInCurrentSpineCount is wrong.
When the app load the epub file first time and the app load the chapter 5（or other chapters） at the first time, sometimes it get the wrong pagesInCurrentSpineCount(this is wrong : totalWidtht == webView.bounds.size.width, pagesInCurrentSpineCount == 1), the pagesInCurrentSpineCount is wrong.