(Objective-C) Delete Email Individually (One at a time) from an IMAP Mailbox

Downloads email from an IMAP mailbox and deletes emails individually (one by one).

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#import <CkoImap.h>
#import <CkoMessageSet.h>
#import <CkoEmailBundle.h>
#import <CkoEmail.h>

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

CkoImap *imap = [[CkoImap alloc] init];

// Connect to an IMAP server.
// Use TLS
imap.Ssl = YES;
imap.Port = [NSNumber numberWithInt:993];
BOOL success = [imap Connect: @"imap.someMailServer.com"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Login
success = [imap Login: @"myLogin" password: @"myPassword"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Select an IMAP mailbox
success = [imap SelectMailbox: @"Inbox"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

CkoMessageSet *messageSet = 0;
// We can choose to fetch UIDs or sequence numbers.
BOOL fetchUids = YES;
// Get the message IDs of all the emails in the mailbox
messageSet = [imap Search: @"ALL" bUid: fetchUids];
if (imap.LastMethodSuccess == NO) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Fetch the emails into a bundle object:
CkoEmailBundle *bundle = 0;
bundle = [imap FetchBundle: messageSet];
if (imap.LastMethodSuccess == NO) {

    NSLog(@"%@",imap.LastErrorText);
    return;
}

// To mark a complete set of emails for deletion, call SetFlags:
success = [imap SetFlags: messageSet flagName: @"Deleted" value: [NSNumber numberWithInt: 1]];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Messages can also be marked for deletion individually:
// Loop over the bundle and mark each message for deletion.
int i = 0;
int numEmails = [bundle.MessageCount intValue];
while (i < numEmails) {
    CkoEmail *email = [bundle GetEmail: [NSNumber numberWithInt: i]];
    NSLog(@"%@",email.From);
    NSLog(@"%@",email.Subject);

    // To delete this email, set the "Deleted" flag to 1.
    // The email is not actually deleted until Expunge or
    // ExpungeAndClose is called.
    success = [imap SetMailFlag: email flagName: @"Deleted" value: [NSNumber numberWithInt: 1]];
    if (success != YES) {
        NSLog(@"%@",imap.LastErrorText);
        return;
    }

    NSLog(@"%@",@"--");

    i = i + 1;
}

success = [imap ExpungeAndClose];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);

    return;
}

// Disconnect from the IMAP server.
success = [imap Disconnect];