iPhone: Downloading zip and extracting in main bundle subdirectory at runtime

Question

I want to extend my iPhone app that the app downloads a zip file into a sub directory then extracts it and then load images which were inside the zip.

Any ideas how to unzip in run-time and the access the images? Would be really happy for some idea.

Greetings,

Main bundle is read-only. You can't extract a file to it, however you could use a local directory like the documents directory. — Juan Catalan, May 26 '15 at 21:33

score 20 · Answer 1 · answered Mar 22 '11 at 01:00

20

I've used ZipArchive with success in the past.

It's pretty ligthweight and simple to use, supports password protection, multiple files inside a ZIP, as well as compress & decompress.

The basic usage is:

NSString *filepath = [[NSBundle mainBundle] pathForResource:@"ZipFileName" ofType:@"zip"];
ZipArchive *zipArchive = [[ZipArchive alloc] init];
[zipArchive UnzipOpenFile:filepath Password:@"xxxxxx"];
[zipArchive UnzipFileTo:{pathToDirectory} overWrite:YES];
[zipArchive UnzipCloseFile];
[zipArchive release];

answered Mar 22 '11 at 01:00

Rog

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how to check if the file is password protected or not, does it support that – AMH Sep 13 '11 at 11:12
1

This is based on obj C++, can I get Obj C version so that I don't have to use OBJ C++ compiler? – Satyam Mar 26 '12 at 12:25
@Rog can I use ZipArchive for ios 6 – vignesh kumar Oct 12 '12 at 12:23
I couldn't get my app to build with this, I am adding libz.1.2.5.dylib but it's not running, which frameworks are you importing ? – Daniel Oct 16 '12 at 15:14

score 9 · Answer 2 · answered Mar 22 '11 at 00:59

9

You cannot extract into your bundle. Use [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] to get the path to a directory you can write to.

You can use the code from http://code.google.com/p/ziparchive/ to extract files from the zip archive.

answered Mar 22 '11 at 00:59

Anomie

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can I use Ziparchive for ios 6 – vignesh kumar Oct 12 '12 at 12:22

score 3 · Answer 3 · edited Sep 02 '13 at 12:38

3

If you add ZipArchive to your project, remember to also add the framework. The correct framework is libz.dylib. Latest version (Xcode 4.2) is 1.2.5.

(Add framework to the section with libraries in the build phases tab of your target.)

edited Sep 02 '13 at 12:38

Rahul Patel

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answered Mar 06 '12 at 08:31

Bjinse

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score 2 · Answer 4 · answered Sep 02 '13 at 12:06

I suggest you to use ssziparchive bcoz it support both ARC and Non ARC project.

Add SSZipArchive.h, SSZipArchive.m, and minizip to your project.
Add latest version of the libz(right now its libz1.2.5) library to your target.

You don't need to do anything regarding ARC. SSZipArchive will detect if you're not using ARC and add the required memory management code.

And code will be like this:

    NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

    // Unzipping

    //If your zip is in document directory than use this code
    NSString *zipPath = [documentsDirectory stringByAppendingPathComponent:@"mediadata.zip"];
    //else if zip file is in bundle than use this code
    NSString *zipPath = [[NSBundle mainBundle] pathForResource:@"mediadata" ofType:@"zip"];

    NSString *destinationPath = [documentsDirectory stringByAppendingPathComponent:@"MediaData"];


    if( [SSZipArchive unzipFileAtPath:zipPath toDestination:destinationPath] != NO ) {
        //unzip data success
        //do something
        NSLog(@"Dilip Success");
    }else{
        NSLog(@"Dilip Error");
    }

If ".zip" file in server, how to use SSZipArchive library. Please let us know — Josh Kethepalli, Feb 19 '15 at 13:00
@JoshKethepalli in this case you have to download ZIP file first in the local and than extract it, Without original ZIP file in local storage there is no way you can extract it. — Dilip Manek, Feb 20 '15 at 05:47
When i m extracting the file it shows ".dat" format. How to extract the file same like as normal folder — Josh Kethepalli, Feb 20 '15 at 10:12
@JoshKethepalli Can you check you zip, that its not corrupted after download. — Dilip Manek, Feb 20 '15 at 13:40

iPhone: Downloading zip and extracting in main bundle subdirectory at runtime

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