无法将CSV文件附加到iPhone邮件应用程序

Question

下面的代码完美地通过邮件应用程序发送文本（.txt）附件（textfile.csv需要随处使用textfile.txt进行修改）。但是，当我尝试附加csv文件时，它根本不起作用（邮件应用程序打开时显示textfile.csv的图标，但是当邮件到达时，它没有附件（数据不显示在邮件正文内）。区别，如果我改变，MIME类型为“text/plain的。”我疑惑......我在做什么错了？任何想法吗？

- (NSString *)getPath { 
    NSString *paths = [NSSearchPathForDirectoriesInDomains 
    (NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; 
    return [paths stringByAppendingPathComponent:@"textfile.csv"]; 
} 

//Saves file to Documents folder 
//Method writes a string to a text file 
-(void) writeToTextFile{ 
//get the documents directory: 
NSArray *paths = NSSearchPathForDirectoriesInDomains 
(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 


//make a file name to write the data to using the documents directory: 
NSString *fileName = [NSString stringWithFormat:@"textfile.csv", 
documentsDirectory]; 
//create content 
NSString *content = @"One,Two,Three,Four,Five"; 

//save content to the documents directory 
[content writeToFile:fileName 
    atomically:NO 
    encoding:NSStringEncodingConversionAllowLossy 


error:nil]; 
} 

// Displays an email composition interface inside the application. Populates all the Mail fields. 
-(void)displayComposerSheet 
{ 
MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init]; 
picker.mailComposeDelegate = self; 
[picker setSubject:@"Subject"]; 

// Set up recipients 
NSArray *toRecipients = [NSArray arrayWithObject:@"email@domain.com"]; 

[picker setToRecipients:toRecipients]; 
// Fill out the email body text 
NSString *emailBody = (@"Data is attached as a .CSV file"); 

[picker setMessageBody:emailBody isHTML:NO]; 

NSString *SavedDataPath = [self getPath]; 
NSString *path = SavedDataPath; 

NSData *myData = [NSData dataWithContentsOfFile:path]; 
    [picker addAttachmentData:myData mimeType:@"text/csv" fileName:@"textfile.csv"]; 

[self presentModalViewController:picker animated:YES]; 
    [picker release]; 
} 

Answer 1

NSString *str_mail = @"one,two,three"; 
NSData *myData = [str_mail dataUsingEncoding:NSUTF8StringEncoding]; 

MFMailComposeViewController *mailController = [[MFMailComposeViewController alloc] init]; 
mailController.mailComposeDelegate = self; 
[mailController addAttachmentData:myData mimeType:@"text/csv" fileName:@"myfile"]; 
[mailController setMessageBody:@"body" isHTML:NO]; 
[self presentModalViewController:mailController animated:YES]; 

Answer 2

尽量保持MIMETYPE为@“哑剧”。

Answer 3

[mail addAttachmentData:[[[self eventController] csvDataForEvent:[self event]] dataUsingEncoding:NSUTF8StringEncoding] mimeType:@"text/csv" fileName:[NSString stringWithFormat:@"Product.csv"]];