ios - FastPDFkit Custom class issue -

i using fastpdfkit - third party ios library rendering pdfs , performing custom operations such save, favorite, email etc. on it. since long, using 32-bit version.

now, want upgrade 64-bit. tried integrate new fastpdfkit framework. made small poc controller suggested library. worked fine below:

   -(ibaction)actionopenplaindocument:(id)sender{     /** set document name */     nsstring *documentname = @"manual"; // manual indicates catalog name      /** temporary directory save thumbnails */     nsarray *paths = nssearchpathfordirectoriesindomains(nscachesdirectory, nsuserdomainmask, yes);      /** set thumbnails path */     nsstring *thumbnailspath = [[paths objectatindex:0] stringbyappendingpathcomponent:[nsstring stringwithformat:@"%@",documentname]];      /** document app bundle */     nsurl *documenturl = [nsurl fileurlwithpath:[[nsbundle mainbundle]pathforresource:documentname oftype:@"pdf"]];      /** instancing documentmanager */     mfdocumentmanager *documentmanager = [[mfdocumentmanager alloc]initwithfileurl:documenturl];      /** instancing readerviewcontroller */     readerviewcontroller *pdfviewcontroller = [[readerviewcontroller alloc]initwithdocumentmanager:documentmanager];      /** set resources folder on manager */     documentmanager.resourcefolder = thumbnailspath;      /** set document id thumbnail generation */     pdfviewcontroller.documentid = documentname;      /** present pdf on screen in modal view */     [self presentviewcontroller:pdfviewcontroller animated:yes completion:nil];      /** release pdf controller*/    // [pdfviewcontroller release]; } 

this code works fine default components. here, readerviewcontrolleris controller suggested fastpdfkit open pdf.

in fastpdfkit header files, checked readerviewcontroller derived mfdocumentviewcontroller. this:

@interface readerviewcontroller : mfdocumentviewcontroller <mfdocumentviewcontrollerdelegate 

note: both readerviewcontroller & mfdocumentviewcontroller of fastpdfkit framework , have .h files of them.

now, created custom class iphonepdfviewcontroller.

and tried similar operations it

@interface iphonepdfviewcontroller : mfdocumentviewcontroller <mfdocumentviewcontrollerdelegate 

and in implentation:

iphonepdfviewcontroller *viewcontroller =  [[iphonepdfviewcontroller alloc] initwithdocumentmanager:documentmanager];              viewcontroller.documentname = @"manual";//i took pdf other way.              documentmanager.resourcefolder = thumbnailspath;             viewcontroller.documentid = documentname;              [self.navigationcontroller pushviewcontroller:viewcontroller animated:yes]; 

but crashing saying:

*** terminating app due uncaught exception 'nsinvalidargumentexception', reason: '*** -[__nsplaceholderdictionary initwithobjects:forkeys:count:]: attempt insert nil object objects[0]' *** first throw call stack: (     0   corefoundation                      0x030b9746 __exceptionpreprocess + 182     1   libobjc.a.dylib                     0x04428a97 objc_exception_throw + 44     2   corefoundation                      0x02fafc93 -[__nsplaceholderdictionary initwithobjects:forkeys:count:] + 451     3   corefoundation                      0x02fc3b7b +[nsdictionary dictionarywithobjects:forkeys:count:] + 75     4   catalogapp                    0x00249e4b priorityforoffset + 41190     5   catalogapp                    0x00247f34 priorityforoffset + 33231     6   catalogapp                    0x000d93e8 -[iphonepdfviewcontroller viewdidload] + 72     7   uikit                               0x00eeada4 -[uiviewcontroller loadviewifrequired] + 771     8   uikit                               0x00f227bd -[uinavigationcontroller _layoutviewcontroller:] + 42     9   uikit                               0x00f22d2c -[uinavigationcontroller _updatescrollviewfromviewcontroller:toviewcontroller:] + 235     10  uikit                               0x00f22e30 -[uinavigationcontroller _starttransition:fromviewcontroller:toviewcontroller:] + 90     11  uikit                               0x00f23dd5 -[uinavigationcontroller _startdeferredtransitionifneeded:] + 669     12  uikit                               0x00f24a51 -[uinavigationcontroller __viewwilllayoutsubviews] + 57     13  uikit                               0x0109e750 -[uilayoutcontainerview layoutsubviews] + 213     14  uikit                               0x00e1957a -[uiview(calayerdelegate) layoutsublayersoflayer:] + 668     15  libobjc.a.dylib                     0x0443e771 -[nsobject performselector:withobject:] + 70     16  quartzcore                          0x021bfe47 -[calayer layoutsublayers] + 144     17  quartzcore                          0x021b3925 _zn2ca5layer16layout_if_neededepns_11transactione + 403     18  quartzcore                          0x021b377a _zn2ca5layer28layout_and_display_if_neededepns_11transactione + 26     19  quartzcore                          0x0210fc52 _zn2ca7context18commit_transactionepns_11transactione + 284     20  quartzcore                          0x021110e5 _zn2ca11transaction6commitev + 487     21  quartzcore                          0x021117fc _zn2ca11transaction17observer_callbackep19__cfrunloopobservermpv + 92     22  corefoundation                      0x02fda86e __cfrunloop_is_calling_out_to_an_observer_callback_function__ + 30     23  corefoundation                      0x02fda7b0 __cfrunloopdoobservers + 400     24  corefoundation                      0x02fd01ea __cfrunlooprun + 1226     25  corefoundation                      0x02fcfa5b cfrunlooprunspecific + 443     26  corefoundation                      0x02fcf88b cfrunloopruninmode + 123     27  graphicsservices                    0x055262c9 gseventrunmodal + 192     28  graphicsservices                    0x05526106 gseventrun + 104     29  uikit                               0x00d86106 uiapplicationmain + 1526     30  catalogapp                    0x0007e36a main + 138     31  libdyld.dylib                       0x05b61ac9 start + 1     32  ???                                 0x00000001 0x0 + 1 ) libc++abi.dylib: terminating uncaught exception of type nsexception