Read Epub3 in ios app

Question

I am learning on epub reader app. I have tried and parsed the epub 2. I found that it has a opf file which refer to toc.ncx file which is actually a xml file and I can parse it to get the content and html files. Than I can display it in UIWebView.

I tried with same approach to parse the epub 3 file. I got the .opf file and parse it but the problem is there is no .ncx file. It has toc.xhtml file. It is the index file what I needed but in xhtml format. I am not sure if all files have same format or not. If all epub3 has same format than I can created a custom HTML parser according to my requirement.

Is there any efficient epub3 reader sample available for ios? I found one here but it contains errors and there is nothing mentioned for configuring it.

Any help please.

Answer 1

I know of two iOS EPUB3 readers these are iBooks and Gitden reader.

EPUB3 must contain a navigation file based on HTML5 See: http://www.heliconbooks.com/article/epub3navdoc

You can simply display this file as standard HTML file, however notice that this file must contain semantic tags like There may be more then one section in each TOC file. This file is pointed to by the OPF file, in the manifest section there should be one and only one item with property="nav"