(Objective-C) Transition from Imap.FetchSingleHeader to Imap.FetchEmail

Provides instructions for replacing deprecated FetchSingleHeader method calls with FetchEmail.

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

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

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

// ...
// ...

// ------------------------------------------------------------------------
// The FetchSingleHeader method is deprecated:

CkoEmail *emailObj = [imap FetchSingleHeader: 1 bUid: NO];
if (imap.LastMethodSuccess == NO) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// ...
// ...

// ------------------------------------------------------------------------
// Do the equivalent using FetchEmail.
// Your application creates a new, empty Email object which is passed 
// in the last argument and filled upon success.

BOOL headerOnly = YES;

CkoEmail *emailOut = [[CkoEmail alloc] init];
BOOL success = [imap FetchEmail: headerOnly msgId: 1 bUid: NO email: emailOut];
if (success == NO) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}