(Objective-C) List Files/Directories in Zip by Index

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Demonstrates how to iterate over the files and directories in a zip archive by index.

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#import <CkoZip.h>
#import <CkoZipEntry.h>

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoZip *zip = [[CkoZip alloc] init];

BOOL success = [zip OpenZip: @"qa_data/zips/sample.zip"];
if (success != YES) {
    NSLog(@"%@",zip.LastErrorText);
    return;
}

int numEntries = [zip.NumEntries intValue];
int i = 0;

CkoZipEntry *entry = 0;

while (i < numEntries) {
    entry = [zip GetEntryByIndex: [NSNumber numberWithInt: i]];
    // Note: In the ZIP file format, it is not required for a ZIP file to contain explicit directory entries. 
    // However, explicit directory entries can be included for convenience and compatibility with certain ZIP file processing tools and software.
    // An explicit directory entry in a ZIP file is an entry that specifically represents a directory, rather than a file. 
    // It usually has a directory name with a trailing slash (/) and zero-length content.
    if (entry.IsDirectory) {
        NSLog(@"%d%@%@%@",i,@": ",entry.FileName,@" (directory)");
    }
    else {
        NSLog(@"%d%@%@",i,@": ",entry.FileName);
    }

    i = i + 1;
}

// Sample output:

// 0: aaa/ (directory)
// 1: aaa/pigs.json
// 2: bbb/ (directory)
// 3: bbb/base64Cert.txt
// 4: bbb/sub1/ (directory)
// 5: bbb/sub1/brasil_cert.pem
// 6: bbb/sub2/ (directory)
// 7: bbb/sub2/penguins.gif
// 8: bbb/sub2/starfish.jpg
// 9: hamlet.xml
// 10: hello.pdf

[zip CloseZip];