Question

I want to UnZip Zip File in my application for iPad.
For make this i found in different topic (in stackoverflow ^^) the package minizip.
But my problem is how UnZip multi archive like .zip.001, .zip.002, etc…?

If you need more information ask me.

Thanks in advance for your consideration.

Answer 1

EDIT: if the file naming is .zip.001 then it’s not actually a multi-file zip archive. The file is simply split into several files and the only thing you have to do is put them together. A multi-file zip archive would be named .z01 .z02 .zip

If you already have a working code to read a zip archive, extending it with the ability to read a multiple-file archive should be simple, please refer to:

http://www.pkware.com/documents/casestudies/APPNOTE.TXT

8.2.1 File splitting is a newer derivation of spanning.
Splitting follows the same segmentation process as
spanning, however, it does not require writing each
segment to a unique removable medium and instead supports
placing all pieces onto local or non-removable locations
such as file systems, local drives, folders, etc.

8.3.3 Split ZIP files are typically written to the same location
and are subject to name collisions if the spanned name
format is used since each segment will reside on the same
drive. To avoid name collisions, split archives are named
as follows.

Segment 1 = filename.z01
Segment n-1 = filename.z(n-1)
Segment n = filename.zip

8.3.4 The .ZIP extension is used on the last segment to support
quickly reading the central directory. The segment number
n should be a decimal value.