How to get audio and video link from the pdf?

I have implemented odf reader application for iphone.Now i want to get list of audio url and video url from the pd开发者_StackOverflow中文版f.I dont know how it possible.Please help me for this query.

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All right then, with your CGPDFDocumentRef pointing to a valid PDF Document you could iterate over all available Pages of the Document using the CGPDFDocumentGetNumberOfPages and the CGPDFDocumentGetPage functions. The result of the CGPDFDocumentGetPage function is a CGPDFPageRef reference. Within the CGPDFPage API and the CGPDFDocument API you'll find the CGPDFPageGetDictionary function which returns you a CGPDFDictionaryRef reference. It depends on how your PDF is build but in one of those Dictionarys are the informations stored you need. You can call CGPDFDictionaryApplyFunction function on the Dictionary, passing a function pointer to callback with this signature:

void ApplierFunction (const char *key,  CGPDFObjectRef object, void *info);

The callback is called for every key/value pair of the specific dictionary. You should find what you are looking for within one of the CGPDFObjectRef references.

Also take a look at the Documentation of CGPDFDocument, CGPDFPage and CGPDFDictionary.