Objective-C

Change the Filename of an Attachment

Demonstrates the Chilkat Email.SetAttachmentFilename method, which changes the filename of the attachment at a given zero-based index. This example adds an attachment and renames it, printing the filename before and after.

Background: The attachment filename is what a recipient sees and what most clients suggest when saving the file. Renaming it is handy when the original name is unclear, unsafe, or generic — for example giving a machine-generated tmp12345 a meaningful name like invoice.pdf before sending.

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Objective-C

#import <CkoEmail.h>

BOOL success = NO;

//  Demonstrates the SetAttachmentFilename method, which changes the filename of the
//  attachment at the given zero-based index.

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

[email AddStringAttachment: @"oldname.txt" str: @"Some notes."];
NSLog(@"%@%@",@"Filename before: ",[email GetAttachmentFilename: [NSNumber numberWithInt: 0]]);

//  Change the filename of the first attachment (index 0).
success = [email SetAttachmentFilename: [NSNumber numberWithInt: 0] filename: @"newname.txt"];
if (success == NO) {
    NSLog(@"%@",email.LastErrorText);
    return true;
}

NSLog(@"%@%@",@"Filename after: ",[email GetAttachmentFilename: [NSNumber numberWithInt: 0]]);