Objective-C

Set the Content-Disposition of an Attachment

Demonstrates the Chilkat Email.SetAttachmentDisposition method, which sets the Content-Disposition value for the attachment at a given zero-based index. The default disposition is attachment. This example changes an attachment's disposition to inline.

Background: The Content-Disposition header hints how a client should present a part: attachment means "offer it as a download," while inline means "display it within the message" (as an email client does with an embedded image). Setting it lets you control that behavior — though clients ultimately decide how to honor the hint.

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Objective-C

#import <CkoEmail.h>

BOOL success = NO;

//  Demonstrates the SetAttachmentDisposition method, which sets the Content-Disposition
//  value for the attachment at the given zero-based index.  The default disposition is
//  "attachment".

CkoEmail *email = [[CkoEmail alloc] init];
email.Subject = @"Set attachment disposition";

[email AddStringAttachment: @"image.txt" str: @"(pretend inline content)"];

//  Set the disposition of the first attachment (index 0) to "inline".
success = [email SetAttachmentDisposition: [NSNumber numberWithInt: 0] disposition: @"inline"];
if (success == NO) {
    NSLog(@"%@",email.LastErrorText);
    return true;
}

//  The attachment's Content-Disposition is now "inline".
NSLog(@"%@",[email GetMime]);