trying to search the index in the pdf file in iphone

Question

in my ipad application i am trying to search the index in the pdf file which is loaded. so i use the following code to do that..

CGPDFDictionaryRef pdfDocDictionary = CGPDFDocumentGetCatalog(pdf);
CGPDFDocumentApplyFunction(pdfDocDictionary, ListDictionaryObjects, NULL);
static void ListDictionaryObjects (const char *key, CGPDFObjectRef object, void *info) {
 NSLog("key: %s", key);
 CGPDFObjectType type = CGPDFObjectGetType(object);
 switch (type) { 
    case kCGPDFObjectTypeDictionary: {
        CGPDFDirectoryRef objectDictionary;
        if (CGPDFObjectGetValue(object, kCGPDFObjectTypeDictionary, &objectDictionary)) {
        CGPDFDocumentApplyFunction(objectDictionary, ListDictionaryObjects, NULL);
        }
    }
    case kCGPDFObjectTypeInteger: {
        CGPDFInteger objectInteger;
        if (CGPDFObjectGetValue(object, kCGPDFObjectTypeInteger, &objectInteger)) {
            NSLog("pdf integer value: %ld", (long int)objectInteger); 
        }
    }
 }    

}

here the error coming is that CGPDFDocumentApplyfunction refrenced from 
[pdfParse pasepdf] in parsepdf.o ....
symbol(s) not found..
collect2: (ld) return 1 exit status..