(Objective-C) Quoted-Printable Encode/Decode a String

Objective-C example to quoted-printable encode and decode a string.

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#import <CkoCrypt2.h>
#import <NSString.h>

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

CkoCrypt2 *crypt = [[CkoCrypt2 alloc] init];

// Here's a string in Icelandic using non us-ascii chars:
NSString *s = @"Ég get etið gler án þess að meiða mig.";

crypt.CryptAlgorithm = @"none";
crypt.EncodingMode = @"quoted-printable";

// Quoted-printable encode/decode the iso-8859-1
// representation of the string.  Notice how each
// Icelandic char is represented by 1 byte:
crypt.Charset = @"iso-8859-1";
NSString *qp = [crypt EncryptStringENC: s];
NSLog(@"%@",@"iso-8859-1:");
NSLog(@"%@",qp);
NSString *decoded = [crypt DecryptStringENC: qp];
NSLog(@"%@",decoded);

// Now do the same using utf-8. Notice how each
// Icelandic char is represented by 2 bytes in utf-8:
crypt.Charset = @"utf-8";
NSString *qp = [crypt EncryptStringENC: s];
NSLog(@"%@",@"utf-8:");
NSLog(@"%@",qp);
NSString *decoded = [crypt DecryptStringENC: qp];
NSLog(@"%@",decoded);