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POIs there any PDF parser written in objective-c or c?
 

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  1. POIs there any PDF parser written in objective-c or c?
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    <p>I'm writing a pdf reader iPhone application.</p> <p>I know how to show pdf file in view using CGPDF** classes in iOS.</p> <p>What I want to do now is to search text in pdf file, and highlight the searched text. So, I need a library which can detect what text is in what position. Besides, I want the library able to handle unicode and Chinese characters.</p> <p>I've searched for a few days but still cannot find anything suitable.</p> <p>I've tried xpdf, but it is written in c++. I don't know how to use c++ code in iPhone app.</p> <p>I've also tried <a href="http://www.codeproject.com/KB/cpp/ExtractPDFText.aspx" rel="nofollow">http://www.codeproject.com/KB/cpp/ExtractPDFText.aspx</a> but it does not handle Chinese characters.</p> <p>I've tried to code by myself, but the encoding in PDF is really complicated.</p> <p>For example, I don't know what to refer to when I want to decode the text by the following font:</p> <pre><code>8 0 obj &lt;&lt; /Type /Font /Subtype /Type0 /Encoding /Identity-H /BaseFont /RNXJTV+PMingLiU /DescendantFonts [ 157 0 R ] &gt;&gt; endobj 157 0 obj &lt;&lt; /Type /Font /Subtype /CIDFontType2 /BaseFont /RNXJTV+PMingLiU /CIDSystemInfo &lt;&lt; /Registry (Adobe) /Ordering (CNS1) /Supplement 0 &gt;&gt; /FontDescriptor 158 0 R /W 161 0 R /DW 1000 /CIDToGIDMap 162 0 R &gt;&gt; endobj 158 0 obj &lt;&lt; /Type /FontDescriptor /Ascent 801 /CapHeight 711 /Descent -199 /Flags 32 /FontBBox [0 -199 999 801] /FontName /RNXJTV+PMingLiU /ItalicAngle 0 /StemV 0 /Leading 199 /MaxWidth 1000 /XHeight 533 /FontFile2 159 0 R &gt;&gt; endobj </code></pre>
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    1. COC++ in iPhone app: Objective-C++.. try using the `.mm` extension and go from there... here is a link to get you started: http://iphonedevelopertips.com/cpp/c-on-iphone-part-1.html
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    2. COThanks a lot! I make some changes and finally make the C++ library works. Chinese characters decode correctly! Now I'm trying hard to understand where to get the position information.
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    3. COHey! I want also to search text in pdf file, and highlight the searched text. Which way you choosed at least. Is it working?
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