Question

我正在使用以下代码通过电子邮件发送csv。电子邮件是发送的，我在收件箱中收到了，但我没有收到附件中的csv文件，对错误有任何疑问？

-(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];
}

我正在生成csv个文件，然后以附件形式发送电子邮件。

我在邮箱中打开电子邮件，它不包含任何附件。

Answer 1

根据我看到的there，我会说您忘记在文件名末尾添加.csv：）

Answer 2

根据NSData类引用，dataWithContentsOfFile：给出的路径应该是绝对路径。所以你应该使用

[NSString stringWithFormat:@"%@/test.csv", docsDir]

而不只是@"test.csv"

我打赌你的myData是零或空的。

顺便说一下，我只用一次完全限定的路径/文件名创建一个NSString对象并重新使用它而不是创建它3到4次。

Answer 3

这段代码每次都适合我！

http://developer.apple.com/library/ios/#samplecode/MailComposer/Introduction/Intro.html#//apple_ref/doc/uid/DTS40008865

Answer 4

尝试替换上面这行

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

Answer 5

最后我解决了这个问题。电子邮件附加附件只是文件是空的。这是因为for循环初始化为-1而i变为int i = 0，它现在正常工作

电子邮件不附加文件

5 个答案: