Email does not attach file - objective-c

Question

I'm using the below code to send a csv via email. The email is send and I received in my Inbox, but I'm not receiving the csv file attached, any idea about what is wrong?
-(void)generateCSV
{
NSFileManager *filemgr = [NSFileManager defaultManager];
NSArray *dirPaths;
NSString *docsDir;
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
if ([filemgr fileExistsAtPath:[NSString stringWithFormat:#"%#/test.csv", docsDir] ] == NO)
{
[filemgr createFileAtPath:[NSString stringWithFormat:#"%#/test.csv", docsDir] contents:[#"" dataUsingEncoding: NSUnicodeStringEncoding] attributes: nil];
}
surveyarray = [db retrieveSurvey];
CHCSVWriter * csvWriter = [[CHCSVWriter alloc] initWithCSVFile:[NSString stringWithFormat:#"%#/test.csv", docsDir] atomic:NO];
NSString *str = [NSString stringWithFormat: #"No, CreatedDate, Question1, Question2, Question3, Comment\n"];
[csvWriter writeField:str];
for(int i = 0; i < surveyarray.count; i++)
{
survey = [surveyarray objectAtIndex:i];
NSString *str = [NSString stringWithFormat: #"%d, %#, %#, %#, %#, %#\n", i, survey.createddate, survey.question1, survey.question2, survey.question3, survey.comment];
[csvWriter writeField:str];
}
NSMutableString *subject = [[NSMutableString alloc] init];
NSMutableString *emailBody = [[NSMutableString alloc] init];
[subject appendString:#""];
MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];
mailer.mailComposeDelegate = self;
[mailer setSubject:subject];
NSArray *toRecipients = [NSArray arrayWithObjects:#"", nil];
[mailer setToRecipients:toRecipients];
NSData *myData = [NSData dataWithContentsOfFile:[NSString stringWithFormat:#"%#/test.csv", docsDir]];
NSLog(#"%#", myData);
[mailer addAttachmentData:myData mimeType:#"text/csv" fileName:#"test.csv"];
[mailer setMessageBody:emailBody isHTML:NO];
mailer.modalPresentationStyle = UIModalPresentationPageSheet;
[self presentModalViewController:mailer animated:YES];
[mailer release];
[subject release];
[emailBody release];
[csvWriter release];
}
I am generating csv file then send email as attachment.
I open the email in my mailbox, it does not content any attachment.

Answer 1

According to what I see there, I'd say that you forgot to add .csv at the end of your filename :)

Answer 2

According to the NSData class reference, the path given with dataWithContentsOfFile: should be the absolute path. So you should use
[NSString stringWithFormat:#"%#/test.csv", docsDir]
instead of just #"test.csv"
I bet currently your myData is nil or empty.
By the way, I would create an NSString object with the fully qualified path/filename only once and re-use that rather than creating it 3 or 4 times.

Answer 3

This code works for me every time!
http://developer.apple.com/library/ios/#samplecode/MailComposer/Introduction/Intro.html#//apple_ref/doc/uid/DTS40008865

Answer 4

try replacing above line this
[mailer addAttachmentData:myData mimeType:#"text/csv" fileName:#"test.csv"];

Answer 5

finally I solved the problem. The email did attached attachment just the file is empty. This is because the for loop initial with -1 and i change to int i = 0, it works fine now