Iphone 将CSV文件附加到电子邮件目标的问题-C

我正在使用以下iAction将包含一些简单回执数据的CSV文件附加到电子邮件中，但是，当电子邮件编写器视图打开时，正文部分会显示一个灰色文件，并且当我实际发送消息时，该消息发送时根本没有附件

这是我的密码：

    - (IBAction)actionEmailComposer {
    NSLog(@"Receipts Count: %d", [receipts count]);
    //Create CSV File
    NSMutableString *csvString = [[NSMutableString alloc] init];
    [csvString appendString:@"Date,Business,Category,Paid By,Note, Number,Currency, Amount"];

    for (int i = 0; i < [receipts count]; i++){

        [csvString appendString: [[receipts objectAtIndex:i] receiptDate]];
        [csvString appendString: [[receipts objectAtIndex:i] business]];
        [csvString appendString: [[receipts objectAtIndex:i] category]];
        [csvString appendString: [[receipts objectAtIndex:i] paidBy]];
        [csvString appendString: [[receipts objectAtIndex:i] note]];
        [csvString appendString: [[receipts objectAtIndex:i] number]];
        [csvString appendString: [[receipts objectAtIndex:i] currency]];
        [csvString appendString: [[receipts objectAtIndex:i] amount]];

    }

    [csvString writeToFile:@"test.csv" atomically:YES encoding:NSUTF8StringEncoding error:NULL];

    if ([MFMailComposeViewController canSendMail]) {

        NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
//        NSString *recipient = [defaults objectForKey:@"reportsEmail"];
        NSString *recipient = @"testemail@live.com";
        NSArray *recipients = [NSArray arrayWithObjects:recipient, nil];

        MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];
        mailViewController.mailComposeDelegate = self;
        [mailViewController setSubject:@"CSV Export"];
        [mailViewController setToRecipients:recipients];
        [mailViewController setMessageBody:@"" isHTML:NO];
        mailViewController.navigationBar.tintColor = [UIColor blackColor];
        NSData *myData = [NSData dataWithContentsOfFile:@"test.csv"];

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

        [self presentModalViewController:mailViewController animated:YES];

    }
    //Display alert to the user
    else {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Can't Send Mail"
                                                            message:@"Device is unable to send email in its current state." 
                                                           delegate:nil
                                                  cancelButtonTitle:@"OK" 
                                                  otherButtonTitles:nil];

        [alertView show];
    }

}

-（iAction）actionEmailComposer{
NSLog（@“收据计数：%d”，[收据计数]）；
//创建CSV文件
NSMutableString*csvString=[[NSMutableString alloc]init]；
[csvString appendString:@“日期、业务、类别、付款人、票据、编号、货币、金额”]；
对于（int i=0；i<[收据计数]；i++）{
[csvString appendString:[[receipts objectAtIndex:i]receiptDate]]；
[csvString appendString:[[receipts objectAtIndex:i]business]]；
[csvString appendString:[[receipts objectAtIndex:i]类别]]；
[csvString appendString:[[receipts objectAtIndex:i]paidBy]]；
[csvString appendString:[[receipts objectAtIndex:i]note]]；
[csvString appendString:[[receipts objectAtIndex:i]number]]；
[csvString appendString:[[receipts objectAtIndex:i]currency]]；
[csvString appendString:[[receipts objectAtIndex:i]金额]]；
}
[csvString writeToFile:@“test.csv”原子：是编码：NSUTF8StringEncoding错误：NULL]；
如果（[MFMailComposeViewController canSendMail]）{
NSUserDefaults*默认值=[NSUserDefaults standardUserDefaults]；
//NSString*recipient=[defaults objectForKey:@“reportsEmail”]；
NSString*收件人=@“testemail@live.com";
NSArray*recipients=[NSArray arrayWithObjects:recipient，nil]；
MFMailComposeViewController*mailViewController=[[MFMailComposeViewController alloc]init]；
mailViewController.mailComposeDelegate=self；
[mailViewController设置主题：@“CSV导出”]；
[mailViewController设置收件人：收件人]；
[mailViewController setMessageBody:@“isHTML:否]；
mailViewController.navigationBar.tintColor=[UIColor blackColor]；
NSData*myData=[NSData dataWithContentsOfFile:@“test.csv”]；
[mailViewController addAttachmentData:myData
mimeType:@“text/csv”
文件名：@“测试”]；
[self-presentModalViewController:mailViewController动画：是]；
}
//向用户显示警报
否则{
UIAlertView*alertView=[[UIAlertView alloc]initWithTitle:@“无法发送邮件”
消息：@“设备无法在其当前状态下发送电子邮件。”
代表：无
取消按钮：@“确定”
其他按钮：无]；
[警报视图显示]；
}
}

csvString输出：

日期、业务、类别、付款人、票据、编号、货币、金额“2012年7月17日”、“tho”、“1类”、“支票”、“午餐”、“726269”、“英镑”、“100.00”

所以有现有的数据，它似乎没有正确地连接，有人能解释这里发生了什么吗

谢谢

---

Jack

这是违反直觉的，但是附加文件时的文件名不包括扩展名。因此，使用名为“test.csv”的文件名：

---

这与直觉相反，但附加文件时的文件名不包括扩展名。因此，使用名为“test.csv”的文件名：

试试这个代码

            arr_email=[[NSMutableArray alloc] initWithArray:[objDatabase lookupAllForSQL:@"select * from password"]];


    NSString *mystr=@"";
    NSString *str_type;
    NSString *str_name;
    NSString *str_user;
    NSString *str_pwd;
    NSString *str_url;
    NSString *str_descr;
    NSString *csvstr;

    csvstr=[NSString stringWithFormat:@"Account Type,Account Name,UserName/Card No,Password/Pin No, URL/Other Info,Description"];

    for (int i=0; i<[arr_email count]; i++) {
        NSMutableDictionary *dict = [arr_email objectAtIndex:i];

        str_type=[NSString stringWithFormat:@"%@",[dict objectForKey:@"AccountType"]];
        str_name=[NSString stringWithFormat:@"%@",[dict objectForKey:@"AccountName"]];
        str_user=[NSString stringWithFormat:@"%@",[dict objectForKey:@"UserName"]];
        str_pwd=[NSString stringWithFormat:@"%@",[dict objectForKey:@"Password"]];
        str_url=[NSString stringWithFormat:@"%@",[dict objectForKey:@"Url"]];
        str_descr=[NSString stringWithFormat:@"%@",[dict objectForKey:@"Description"]];

         mystr=[NSString stringWithFormat:@"%@ \n %@,%@,%@,%@,%@,%@",mystr,str_type,str_name,str_user,str_pwd,str_url,str_descr];

    }
    csvstr=[NSString stringWithFormat:@"%@ \n %@",csvstr,mystr];   
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *docDir = [paths objectAtIndex:0];

    NSString *filename = [docDir stringByAppendingPathComponent:[NSString stringWithFormat:@"My Private Closet.csv"]];
    NSError *error = NULL;
    BOOL written = [csvstr writeToFile:filename atomically:YES encoding:NSUTF8StringEncoding error:&error];
    if (!written)
    NSLog(@"write failed, error=%@", error);

arr_email=[[NSMutableArray alloc]initWithArray:[objDatabase lookupAllForSQL:@“从密码中选择*”]；
NSString*mystr=@；
NSString*str_类型；
NSString*str_名称；
NSString*str_用户；
NSString*str_pwd；
NSString*str_url；
NSString*STRU descr；
NSString*csvstr；
csvstr=[NSString stringWithFormat:@“帐户类型、帐户名称、用户名/卡号、密码/Pin号、URL/其他信息、说明”]；
对于（inti=0；i请尝试以下代码

            arr_email=[[NSMutableArray alloc] initWithArray:[objDatabase lookupAllForSQL:@"select * from password"]];


    NSString *mystr=@"";
    NSString *str_type;
    NSString *str_name;
    NSString *str_user;
    NSString *str_pwd;
    NSString *str_url;
    NSString *str_descr;
    NSString *csvstr;

    csvstr=[NSString stringWithFormat:@"Account Type,Account Name,UserName/Card No,Password/Pin No, URL/Other Info,Description"];

    for (int i=0; i<[arr_email count]; i++) {
        NSMutableDictionary *dict = [arr_email objectAtIndex:i];

        str_type=[NSString stringWithFormat:@"%@",[dict objectForKey:@"AccountType"]];
        str_name=[NSString stringWithFormat:@"%@",[dict objectForKey:@"AccountName"]];
        str_user=[NSString stringWithFormat:@"%@",[dict objectForKey:@"UserName"]];
        str_pwd=[NSString stringWithFormat:@"%@",[dict objectForKey:@"Password"]];
        str_url=[NSString stringWithFormat:@"%@",[dict objectForKey:@"Url"]];
        str_descr=[NSString stringWithFormat:@"%@",[dict objectForKey:@"Description"]];

         mystr=[NSString stringWithFormat:@"%@ \n %@,%@,%@,%@,%@,%@",mystr,str_type,str_name,str_user,str_pwd,str_url,str_descr];

    }
    csvstr=[NSString stringWithFormat:@"%@ \n %@",csvstr,mystr];   
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *docDir = [paths objectAtIndex:0];

    NSString *filename = [docDir stringByAppendingPathComponent:[NSString stringWithFormat:@"My Private Closet.csv"]];
    NSError *error = NULL;
    BOOL written = [csvstr writeToFile:filename atomically:YES encoding:NSUTF8StringEncoding error:&error];
    if (!written)
    NSLog(@"write failed, error=%@", error);

arr_email=[[NSMutableArray alloc]initWithArray:[objDatabase lookupAllForSQL:@“从密码中选择*”]；
NSString*mystr=@；
NSString*str_类型；
NSString*str_名称；
NSString*str_用户；
NSString*str_pwd；
NSString*str_url；
NSString*STRU descr；
NSString*csvstr；
csvstr=[NSString stringWithFormat:@“帐户类型、帐户名称、用户名/卡号、密码/Pin号、URL/其他信息、说明”]；
对于（int i=0；这是一种构建
stringToWrite
的糟糕方法。为了我的心情平静，请至少使用一个可变字符串并附加到该字符串。好的，我编辑了我的代码以让您心情平和，谢谢。谢谢，我感到放心了；）我想你留下引号是为了简洁？这是构建
stringToWrite
的糟糕方法。为了我的心情平静，请至少使用一个可变字符串并附加到该字符串上。好的，我编辑了我的代码是为了你的心情平静，谢谢。谢谢，我感到宽慰；）我想你留下引号是为了简洁？嗨，谢谢你的回答，但这并没有改变任何事情。。我已经编辑了我的代码以合并更改。您能验证文件是否已写入并包含正确的数据吗？另外，请确保
myData
包含某些内容。（我使用了
dataWithContentsOfURL
，它很有效。）嗨，谢谢你的回答，但它没有改变任何东西。。我已经编辑了我的代码以合并更改。您能验证文件是否已写入并包含正确的数据吗？另外，请确保
myData
包含某些内容。（我使用了
dataWithContentsOfURL
，它成功了。）