(Objective-C) Unzip Encrypted Text into a String Variable

Demonstrates how to open an encrypted .zip archive and unzip a text file directly into 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];

// Set the password required for decrypting.
zip.DecryptPassword = @"myPassword";

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

// Locate the file within the Zip to be unzipped into a string variable:
CkoZipEntry *entry = [[CkoZipEntry alloc] init];
success = [zip EntryMatching: @"*.csv" entry: entry];
if (success == NO) {
    NSLog(@"%@",zip.LastErrorText);
    return;
}

// lineEndingBehavior:
// 0 = leave unchanged.
// 1 = convert all to bare LF's
// 2 = convert all to CRLF's
int lineEndingBehavior = 0;
NSString *srcCharset = @"utf-8";

NSString *strCsv = [entry UnzipToString: [NSNumber numberWithInt: lineEndingBehavior] srcCharset: srcCharset];
NSLog(@"%@",strCsv);