附件不包括'；t显示在通过iPhone发送的邮件中

我已经通过iPhone应用程序发送了附件

但是，当我看到邮件时，我可以看到upin，它显示有附件

但是当我打开邮件时，我找不到任何附件

这背后的问题是什么

-(IBAction)btnPressedExport:(id)sender{

    NSArray *x=[[NSArray alloc] initWithArray:[DatabaseAccess getAllTransactionsForUserID:[BudgetTrackerAppDelegate getUserID] profileID:[BudgetTrackerAppDelegate getProfileID]]];
    int i=-1,j=[x count];
    NSDictionary *tmp;
    NSMutableString *stringToWrite=[[NSMutableString alloc] init];
    for(;i<j;i++){
        if(i==-1){
            [stringToWrite appendString:@"TransactionID,TransactionDate,ProfileName,ProfileType,GroupName,GroupType,CategoryName,TransactionAmt\n"];
        } else {
            tmp=[x objectAtIndex:i];
            [stringToWrite appendFormat:@"%@,%@,%@,%@,%@,%@,%@,%@\n",
             [tmp valueForKey:@"TraID"],[tmp valueForKey:@"TraDate"],[tmp valueForKey:@"ProfileName"],[tmp valueForKey:@"ProfileType"],[tmp valueForKey:@"GroupName"],[tmp valueForKey:@"GroupType"],[tmp valueForKey:@"CatName"],[tmp valueForKey:@"TraAmt"]];
        }
    }
    [stringToWrite writeToFile:[self pathOfCSVForExport] atomically:YES encoding:NSStringEncodingConversionAllowLossy error:nil];
//  [stringToWrite writeToFile:[self pathOfCSVForExport] atomically:YES];


    picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate=self;
//  picker.delegate=self;

    [picker setSubject:@"Hello from Sugar!"];


     //Set up recipients
    NSArray *toRecipients = [NSArray arrayWithObject:@"sugar.srk@pqr.com"]; 
//  NSArray *ccRecipients = [NSArray arrayWithObjects:@"xyz.dalal@pqr.com", @"kandarp.dave@phptalent.com", nil]; 
//  NSArray *bccRecipients = [NSArray arrayWithObject:@"fourth@example.com"]; 

    [picker setToRecipients:toRecipients];
    [picker setCcRecipients:ccRecipients];  
//  [picker setBccRecipients:bccRecipients];

    // Attach an image to the email
    NSString *path = [[NSBundle mainBundle] pathForResource:@"myExport" ofType:@"csv"];
    NSData *myData = [NSData dataWithContentsOfFile:path];

    NSString *fileNameToSend=@"BudgetTracker.csv";//[NSString stringWithFormat:@"%@.csv",[x valueForKey:@"ProfileName"]];

    [picker addAttachmentData:myData mimeType:@"text/plain" fileName:fileNameToSend];
    // text/html/
    // Fill out the email body text
    NSString *emailBody = [NSString stringWithFormat:@"%@",@"Hello! This is export test."];
    [picker setMessageBody:emailBody isHTML:NO];

    [self presentModalViewController:picker animated:YES];

}

-(void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error{
//  NSLog(@"here2");
    switch (result)
    {
        case MFMailComposeResultCancelled: break;
        case MFMailComposeResultSaved: break;
        case MFMailComposeResultSent: break;
        case MFMailComposeResultFailed: break;
        default: break;
    }
//  self.navigationController.navigationBarHidden=NO;
//  [self becomeFirstResponder];
    [self dismissModalViewControllerAnimated:YES];
}

-（iAction）btnPressedExport:（id）发送方{
NSArray*x=[[NSArray alloc]initWithArray:[DatabaseAccess getAllTransactionsForUserID:[BudgetTrackpDelegate getUserID]配置文件ID:[BudgetTrackpDelegate getProfileID]]；
int i=-1，j=[x计数]；
国家统计局*tmp；
NSMutableString*stringToWrite=[[NSMutableString alloc]init]；
对于（；i这看起来是错误的，除非只是为了测试：

// Attach an image to the email
NSString *path = [[NSBundle mainBundle] pathForResource:@"myExport" ofType:@"csv"];
NSData *myData = [NSData dataWithContentsOfFile:path];

您使用的路径是指向应用程序包中的文件，该文件是只读的，因此它不能是您刚才创建的CSV文件

如果你想写一个临时文件并通过电子邮件发送，你需要把它写到像你的文档目录这样的地方，即像

NSArray *sysPaths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES );
NSString *docDirectory = [sysPaths objectAtIndex:0];
NSString *filePath = [NSString stringWithFormat:@"%@/myexport.csv", docDirectory];

它是受支持的附件类型吗？是的！我见过许多应用程序使用此扩展。你能显示你用来发送的代码吗？如果你给自己发送一封电子邮件，其中包含来自mail的相同附件，它会显示吗？好的。让我编辑这个问题。