on 14 Mar, 2017 08:59 PM
I might be VERY late to the party, but since this might be useful for someone else:
For some reason, it fails to load pdfs from the documents path in more recent iOS versions.
Here's what i've done instead:
// fileData is a NSData you extract from the documents path. Your PDF.
NSData *fileData = [NSData dataWithContentsOfFile:yourDocumentPath];
struct CGDataProvider *data = CGDataProviderCreateWithCFData((CFDataRef) fileData);
// Now InitWithDataProvider instead
MFDocumentManager *documentManager = [[MFDocumentManager alloc] initWithDataProvider:data];
Worked for me as of today, in Xcode 8.2.1, iOS 9.1.