將CSV文件附加到電子郵件中的問題目標 - C

Question

我使用以下IBAction將包含一些簡單收據數據的CSV文件附加到電子郵件中，但是，當電子郵件編輯器視圖打開時，灰色out文件出現在正文部分，當我實際發送郵件時，郵件根本沒有附件發送。

繼承人我的代碼：

- (IBAction)actionEmailComposer { 
    NSLog(@"Receipts Count: %d", [receipts count]); 
    //Create CSV File 
    NSMutableString *csvString = [[NSMutableString alloc] init]; 
    [csvString appendString:@"Date,Business,Category,Paid By,Note, Number,Currency, Amount"]; 

    for (int i = 0; i < [receipts count]; i++){ 

     [csvString appendString: [[receipts objectAtIndex:i] receiptDate]]; 
     [csvString appendString: [[receipts objectAtIndex:i] business]]; 
     [csvString appendString: [[receipts objectAtIndex:i] category]]; 
     [csvString appendString: [[receipts objectAtIndex:i] paidBy]]; 
     [csvString appendString: [[receipts objectAtIndex:i] note]]; 
     [csvString appendString: [[receipts objectAtIndex:i] number]]; 
     [csvString appendString: [[receipts objectAtIndex:i] currency]]; 
     [csvString appendString: [[receipts objectAtIndex:i] amount]]; 

    } 

    [csvString writeToFile:@"test.csv" atomically:YES encoding:NSUTF8StringEncoding error:NULL]; 

    if ([MFMailComposeViewController canSendMail]) { 

     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; 
//  NSString *recipient = [defaults objectForKey:@"reportsEmail"]; 
     NSString *recipient = @"testemail@live.com"; 
     NSArray *recipients = [NSArray arrayWithObjects:recipient, nil]; 

     MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init]; 
     mailViewController.mailComposeDelegate = self; 
     [mailViewController setSubject:@"CSV Export"]; 
     [mailViewController setToRecipients:recipients]; 
     [mailViewController setMessageBody:@"" isHTML:NO]; 
     mailViewController.navigationBar.tintColor = [UIColor blackColor]; 
     NSData *myData = [NSData dataWithContentsOfFile:@"test.csv"]; 

     [mailViewController addAttachmentData:myData 
            mimeType:@"text/csv" 
            fileName:@"test"]; 

     [self presentModalViewController:mailViewController animated:YES]; 

    } 
    //Display alert to the user 
    else { 
     UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Can't Send Mail" 
                  message:@"Device is unable to send email in its current state." 
                  delegate:nil 
                cancelButtonTitle:@"OK" 
                otherButtonTitles:nil]; 

     [alertView show]; 
    } 

} 

csvString輸出：

日期，業務，類別，支付的，請注意，編號，幣種，金額 「2012年7月17日」， 「壽」，」類別1「，」支票「，」午餐「，」726269「，」GBP「，」100.00「

因此，現有的數據，它似乎沒有正確附加，任何人都可以解釋這裏發生了什麼？

感謝，

傑克

Answer 1

試試這個代碼

  arr_email=[[NSMutableArray alloc] initWithArray:[objDatabase lookupAllForSQL:@"select * from password"]]; 


    NSString *mystr=@""; 
    NSString *str_type; 
    NSString *str_name; 
    NSString *str_user; 
    NSString *str_pwd; 
    NSString *str_url; 
    NSString *str_descr; 
    NSString *csvstr; 

    csvstr=[NSString stringWithFormat:@"Account Type,Account Name,UserName/Card No,Password/Pin No, URL/Other Info,Description"]; 

    for (int i=0; i<[arr_email count]; i++) { 
     NSMutableDictionary *dict = [arr_email objectAtIndex:i]; 

     str_type=[NSString stringWithFormat:@"%@",[dict objectForKey:@"AccountType"]]; 
     str_name=[NSString stringWithFormat:@"%@",[dict objectForKey:@"AccountName"]]; 
     str_user=[NSString stringWithFormat:@"%@",[dict objectForKey:@"UserName"]]; 
     str_pwd=[NSString stringWithFormat:@"%@",[dict objectForKey:@"Password"]]; 
     str_url=[NSString stringWithFormat:@"%@",[dict objectForKey:@"Url"]]; 
     str_descr=[NSString stringWithFormat:@"%@",[dict objectForKey:@"Description"]]; 

     mystr=[NSString stringWithFormat:@"%@ \n %@,%@,%@,%@,%@,%@",mystr,str_type,str_name,str_user,str_pwd,str_url,str_descr]; 

    } 
    csvstr=[NSString stringWithFormat:@"%@ \n %@",csvstr,mystr]; 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *docDir = [paths objectAtIndex:0]; 

    NSString *filename = [docDir stringByAppendingPathComponent:[NSString stringWithFormat:@"My Private Closet.csv"]]; 
    NSError *error = NULL; 
    BOOL written = [csvstr writeToFile:filename atomically:YES encoding:NSUTF8StringEncoding error:&error]; 
    if (!written) 
    NSLog(@"write failed, error=%@", error); 

Answer 2

這是違反直覺的，但是當你附加的文件的文件名不包括擴展名。因此，所謂的 「test.csv」 文件名：

[mailViewController addAttachmentData:myData 
          mimeType:@"text/csv" 
          fileName:@"test"];