Question

所以我有一段时间遇到这个问题而且无法让它运转起来！我一直在构建一个调查应用程序，用户只需输入信息并将其保存到csv文件中。我现在处于需要将应用程序中的csv文件附加到电子邮件地址的阶段......

我刚在新的i-phone上测试了这个，收到电子邮件时没有附件？它在邮件应用程序和模拟器中，但是当在电子邮件帐户上收到邮件时附件已经消失了？谁能帮忙？我的代码如下：

- (IBAction)send:(id)sender {

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *savedFilePath = [documentsDirectory stringByAppendingPathComponent:@"result‌s.csv"];
    NSData *csvData = [NSData dataWithContentsOfFile:savedFilePath];

    MFMailComposeViewController *mailcomposer = [[MFMailComposeViewController alloc] init];
    [mailcomposer addAttachmentData:csvData mimeType:@"text/csv" fileName:@"results.csv"];
    [mailcomposer setToRecipients:@[@"gpsflighttrial@gcap.eu"]];
    [mailcomposer setSubject:self.subject.text];
    [mailcomposer setMessageBody:self.message.text isHTML:NO];
}

Answer 1

将您的mimeType更改为@＆＃34; application / csv＆＃34;它会起作用。

Answer 2

未附加csv的原因可以是以下的以太：

1）filename或filepath为wrong，因为csv的结果nsdata将为nil。

2）filename方法中的addAttachmentData mimeType: fileName:应该only name而不是file format的类型。

方法的变化如下：

-(IBAction)send:(id)sender {

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];

    // Determine the file name and extension
    NSString *strFileName = @"results.csv";
    NSArray *filepart = [strFileName componentsSeparatedByString:@"."];
    NSString *filename = [filepart objectAtIndex:0];

    //get file path
    NSString *savedFilePath = [documentsDirectory stringByAppendingPathComponent:strFileName];

    //Now check if file exits
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if ([fileManager fileExistsAtPath:savedFilePath]){ 
       NSData *csvData = [NSData dataWithContentsOfFile:savedFilePath];

       if(csvData)
       {
          MFMailComposeViewController *mailcomposer = [[MFMailComposeViewController alloc] init];
          [mailcomposer addAttachmentData:csvData mimeType:@"text/csv" fileName:filename];
          [mailcomposer setToRecipients:@[@"gpsflighttrial@gcap.eu"]];
          [mailcomposer setSubject:self.subject.text];
          [mailcomposer setMessageBody:self.message.text isHTML:NO];
       }
       else
          NSLog(@"error csv data not created");
    }
    else
       NSLog(@"error file doesnot exists");

}

Answer 3

所以经过许多不眠之夜和许多尝试不同的方式后，我终于找到了与朋友合作的方式（见下面的代码）

 NSString *docsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
    NSData *attachment = [NSData dataWithContentsOfFile:[docsDirectory stringByAppendingPathComponent:@"results.csv"]];

    MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];
    mailer.mailComposeDelegate = self;
    [mailer setToRecipients:@[@"gpsflighttrial@gcap.eu"]];
    [mailer setSubject:self.subject.text];
    [mailer setMessageBody:self.message.text isHTML:NO];
    [mailer addAttachmentData:attachment mimeType:@"application/csv" fileName:@"results.csv"];
    [self presentModalViewController:mailer animated:YES];

以防万一将来有这个问题。

CSV没有附加到应用电子邮件中？

3 个答案: