(Objective-C) Unzip Selected Files from a Zip Archive

Demonstrates how to iterate over the files contained within a .zip and unzip specific files.

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

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

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

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

NSString *unzipDir = @"/temp/unzipDir";

int n;

// Get the number of files and directories in the .zip
n = [zip.NumEntries intValue];
NSLog(@"%d",n);

CkoZipEntry *entry = 0;

int i;
for (i = 0; i <= n - 1; i++) {

    entry = [zip GetEntryByIndex: [NSNumber numberWithInt: i]];
    if (entry.IsDirectory == NO) {
        // (the filename may include a path)
        NSLog(@"%@",entry.FileName);

        // Your application may choose to unzip this entry
        // based on the filename.
        // If the entry should be unzipped, then call Extract(unzipDir)
        success = [entry Extract: unzipDir];
        if (success != YES) {
            NSLog(@"%@",entry.LastErrorText);
            return;
        }

    }

}