我的CSV创建代码出了什么问题

Question

我正在尝试创建一个CSV文件，该文件是来自iPad的电子邮件（CSV文件也是在iPad上创建的）。

然而，我的代码不起作用，我认为它正在创建CSV文件并找到要发送的文件，但当我单击发送并检索电子邮件时，文件不是通过电子邮件发送的，但电子邮件上没有文件。

有人能帮我吗？

我愿意回答任何问题。

谢谢Alex

- (IBAction)save:(id)sender {
    NSString *resultline=[NSString stringWithFormat:@"%@,%@,%@,%@,%@,%@,%@.%@,%@,%@,%@,%@,%@,%@,%@,%@,%@,%@,togS4.5%@,togS7.0%@,togS9.0%@,togS10.5%@,togS13.5%@,togS15.0%@,togD4.5%@,togD7.0%@,togD9.0%@,togD10.5%@,togD13.5%@,togD15.0%@,togK4.5%@,togK7.0%@,togK9.0%@,togK10.5%@,togK13.5%@,togK15.0%@,togSK4.5%@,togSK7.0%@,togSK9.0%@,togSK10.5%@,togSK13.5%@,togSK15.0%@,togE4.5%@,togE7.0%@,togE9.0%@,togE10.5%@,togE13.5%@,togE15.0%@,togA4.5%@,togA7.0%@,togA9.0%@,togA10.5%@,togA13.5%@,togA15.0%@,MIS%@n",
                          self.custNameLabel4.text,
                          self.dateLabel4.text,
                          self.farbicLabel4.text,
                          self.fibreLabel4.text,
                          self.boundLabel4.text,
                          self.quantityLabel4.text,
                          self.sizeLabel4.text,
                          self.sasshlabel3.text,
                          self.innaLabel3.text,
                          self.packedLabel3.text,
                          self.outerLabel3.text,
                          self.palletLabel3.text,
                          self.weeksLabel2.text,
                          self.devileryLabel2.text,
                          self.customerLabel2.text,
                          self.DateLabel1.text,
                          self.textviewtext.text,
                          self.requested.text,
                          self.Elastic.text,
                          self.t1.text,
                          self.t2.text,
                          self.t3.text,
                          self.t4.text,
                          self.t5.text,
                          self.t6.text,
                          self.t7.text,
                          self.t8.text,
                          self.t9.text,
                          self.t10.text,
                          self.t11.text,
                          self.t12.text,
                          self.t13.text,
                          self.t14.text,
                          self.t15.text,
                          self.t16.text,
                          self.t17.text,
                          self.t18.text,
                          self.t19.text,
                          self.t20.text,
                          self.t21.text,
                          self.t22.text,
                          self.t23.text,
                          self.t24.text,
                          self.t25.text,
                          self.t26.text,
                          self.t27.text,
                          self.t28.text,
                          self.t29.text,
                          self.t30.text,
                          self.A1.text,
                          self.A2.text,
                          self.A3.text,
                          self.A4.text,
                          self.A5.text,
                          self.MIS.text];
    NSString *docPath =[NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES)objectAtIndex:0];
    _textviewtext.text = resultline;
    NSString *topper=[docPath stringByAppendingPathComponent:@"/topper.csv"];
    [resultline writeToFile:topper atomically:YES encoding:NSUTF8StringEncoding error:nil];
    //NSLog(@"docpath saved");
    {MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
        picker.mailComposeDelegate  = self;
        [picker setToRecipients:[NSArray arrayWithObjects:@"email Address", nil]];
        [picker setSubject:self.custNameLabel4.text];
        [picker setMessageBody:@"Message"isHTML:NO];
        [picker addAttachmentData:[NSData dataWithContentsOfFile:@"PathToFile.csv"]
                         mimeType:@"text/csv"
                         fileName:@"/topper.csv"];
        picker.navigationBar.barStyle = UIStatusBarStyleLightContent;
        [self presentViewController:picker animated:YES completion:NULL];
    }
}
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
    [self dismissViewControllerAnimated:YES completion:NULL];
}

Answer 1

我猜您不是在向磁盘写入并传递文件的完整路径以发送电子邮件。

确保您已包含委派MFMailComposeViewControllerDelegate我已经测试了以下代码，它工作良好

-(IBAction)save:(id)sender
{

    NSString *resultline=[NSString stringWithFormat:@"%@,%@,%@,%@,%@,%@,%@.%@,%@,%@,%@,%@,%@,%@,%@,%@,%@,%@,togS4.5%@,togS7.0%@,togS9.0%@,togS10.5%@,togS13.5%@,togS15.0%@,togD4.5%@,togD7.0%@,togD9.0%@,togD10.5%@,togD13.5%@,togD15.0%@,togK4.5%@,togK7.0%@,togK9.0%@,togK10.5%@,togK13.5%@,togK15.0%@,togSK4.5%@,togSK7.0%@,togSK9.0%@,togSK10.5%@,togSK13.5%@,togSK15.0%@,togE4.5%@,togE7.0%@,togE9.0%@,togE10.5%@,togE13.5%@,togE15.0%@,togA4.5%@,togA7.0%@,togA9.0%@,togA10.5%@,togA13.5%@,togA15.0%@,MIS%@n",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a",
                          @"a"];
    NSString *docPath =[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0];
    NSString *topper=[docPath stringByAppendingPathComponent:@"topper.csv"];
    [resultline writeToFile:topper atomically:YES encoding:NSUTF8StringEncoding error:nil];
    //NSLog(@"docpath saved");


    MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate  = self;
        [picker setSubject:@"abc"];
        [picker setMessageBody:@"Message"isHTML:NO];
        [picker addAttachmentData:[NSData dataWithContentsOfFile:topper]
                         mimeType:@"text/csv"
                         fileName:@"topper.csv"];


    picker.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
    picker.modalPresentationStyle = UIModalPresentationFormSheet;

    [self presentViewController:picker animated:YES completion:NULL];

}

-(void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
    // Notifies users about errors associated with the interface
    switch (result)
    {
        case MFMailComposeResultCancelled:
            NSLog(@"Result: canceled");
            break;
        case MFMailComposeResultSaved:
            NSLog(@"Result: saved");
            break;
        case MFMailComposeResultSent:
            NSLog(@"Result: sent");
            break;
        case MFMailComposeResultFailed:
            NSLog(@"Result: failed");
            break;
        default:
            NSLog(@"Result: not sent");
            break;
    }
    [self dismissViewControllerAnimated:YES completion:nil];
}