(Objective-C) Transition from MailMan.FetchSingleHeaderByUidl to MailMan.FetchByUidl

Provides instructions for replacing deprecated FetchSingleHeaderByUidl method calls with FetchByUidl.

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

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#import <CkoMailMan.h>
#import <NSString.h>
#import <CkoEmail.h>

CkoMailMan *mailman = [[CkoMailMan alloc] init];

// ...
// ...

int numBodyLines = 5;
NSString *uidl = @"123";

// ------------------------------------------------------------------------
// The FetchSingleHeaderByUidl method is deprecated:

CkoEmail *emailObj = [mailman FetchSingleHeaderByUidl: [NSNumber numberWithInt: numBodyLines] uidl: uidl];
if (mailman.LastMethodSuccess == NO) {
    NSLog(@"%@",mailman.LastErrorText);
    return;
}

// ...
// ...

// ------------------------------------------------------------------------
// Do the equivalent using FetchByUidl.
// 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 = [mailman FetchByUidl: uidl headerOnly: headerOnly numBodyLines: [NSNumber numberWithInt: numBodyLines] email: emailOut];
if (success == NO) {
    NSLog(@"%@",mailman.LastErrorText);
    return;
}