How to read download file from path in ios

I have tried to download and read a file (pdf/epub). I have achieved download and save the file in below path.

Download path is - file path

/Users/apple/Library/Application Support/iPhone Simulator/7.1/Applications/B5C69537-DBAA-45DA-BDF3-84D0F038378D/Documents/3471.epub

But I unable to read from the same path. I am using the below coding for reading the file path.

NSString *testpath =[[NSBundle mainBundle] pathForResource:@"3471" ofType:@"epub"];