无法将 CSV 文件附加到 iPhone 邮件应用程序答案

【问题标题】：Can't attach CSV file to iPhone Mail application无法将 CSV 文件附加到 iPhone 邮件应用程序
【发布时间】：2013-10-27 05:45:47
【问题描述】：

下面的代码非常适合通过邮件应用程序发送文本 (.txt) 附件（textfile.csv 需要在任何地方使用 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（邮件应用程序打开并显示 textfile.csv 的图标，但是当邮件到达时它没有附件（数据也不显示在邮件正文中）。没有如果我将 mime 类型更改为“text/plain”会有所不同。我很困惑......我做错了什么？请有什么想法吗？

    - (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];
}

【问题讨论】：

标签： iphone iphone-sdk-3.0

【解决方案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];

【讨论】：

【解决方案2】：

尝试将 MIMETYPE 保持为 @"mime"。 .

【讨论】：

【解决方案3】：

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

【讨论】：