Objective-C

Get an Attachment as a Text String

Demonstrates the Chilkat Email.GetAttachmentString method, which returns the Nth attachment's data as text. The first argument is the zero-based attachment index and the second is the charset used to interpret the attachment bytes. This example reads a text attachment as utf-8.

Background: Attachments are stored as bytes, so turning one back into a string requires knowing its charset — the rule for mapping bytes to characters. Supplying the correct charset (often utf-8) yields readable text; the wrong one produces garbled characters. This method is meant for text attachments such as .txt, .csv, or .xml; binary attachments should be handled as raw data instead.

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Objective-C

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

//  Demonstrates the GetAttachmentString method, which returns the Nth attachment's data as
//  text.  The first argument is the zero-based attachment index and the second is the charset used to interpret
//  the attachment bytes.

CkoEmail *email = [[CkoEmail alloc] init];
email.Subject = @"Attachment as text";

[email AddStringAttachment: @"notes.txt" str: @"These are the notes stored in the attachment."];

//  Get the first attachment (index 0) as text, interpreting the bytes as utf-8.
NSString *content = [email GetAttachmentString: [NSNumber numberWithInt: 0] charset: @"utf-8"];
NSLog(@"%@%@",@"Attachment 0 text: ",content);