(Objective-C) Unzip Text File to String

Demonstrates how to open a .zip and extract the 1st file (assuming it's a text file) to a string variable.

Note: This example requires Chilkat v11.0.0 or greater.

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

BOOL success = NO;

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

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

success = [zip OpenZip: @"qa_data/zips/EC16100.zip"];
if (success == NO) {
    NSLog(@"%@",zip.LastErrorText);
    return;
}

// Get the 1st file in the .zip
CkoZipEntry *entry = [[CkoZipEntry alloc] init];
success = [zip EntryAt: [NSNumber numberWithInt: 0] entry: entry];
if (success == NO) {
    NSLog(@"%@",zip.LastErrorText);
    return;
}

NSString *fileContents = [entry UnzipToString: [NSNumber numberWithInt: 0] srcCharset: @"utf-8"];
NSLog(@"%@",fileContents);