以编程方式通过电子邮件发送iphone附件 [英] Send an iphone attachment through email programmatically

问题描述

我正在编写一个iPhone应用程序，需要我以编程方式发送电子邮件附件。附件是一个csv文件，我通过代码创建。然后我将文件附加到电子邮件中，附件显示在电话上。然而，当我发送电子邮件给自己时，附件不会显示在电子邮件中。这是我正在使用的代码。

  [self exportData]; 
 
 if（[MFMailComposeViewController canSendMail]）
 {
 NSString * filePath = [[NSBundle mainBundle] pathForResource：@expensesofType：@csv]; 
 NSData * myData = [NSData dataWithContentsOfFile：filePath]; 
 
 MFMailComposeViewController * mailer = [[MFMailComposeViewController alloc] init]; 
 
 mailer.mailComposeDelegate = self; 
 
 [mailer setSubject：@myConsultant的车费]; 
 
 NSString * emailBody = @; 
 [mailer setMessageBody：emailBody isHTML：NO]; 
 
 [mailer addAttachmentData：myData mimeType：@text / plainfileName：@expenses]; 
 
 [self presentModalViewController：mailer animated：YES]; 
 
 [邮件发布]; 
} 
 else 
 {
 UIAlertView * alert = [[UIAlertView alloc] initWithTitle：@Failure
 message：@您的设备不支持作曲家
委托：nil 
 cancelButtonTitle：@OK
 otherButtonTitles：nil]; 
 [alert show]; 
 [alert release]; 
} 
} 
  - （void）mailComposeController :( MFMailComposeViewController *）控制器didFinishWithResult：（MFMailComposeResult）结果错误：（NSError *）错误
 {
 switch ）
 {
案例MFMailComposeResultCancelled：
 NSLog（@取消邮件：您取消了操作，没​​有电子邮件消息已排队。 
 break; 
案例MFMailComposeResultSaved：
 NSLog（@保存邮件：您将电子邮件保存在草稿文件夹中）; 
 break; 
 case MFMailComposeResultSent：
 NSLog（@邮件发送：电子邮件在发件箱中排队，准备发送）; 
 break; 
 case MFMailComposeResultFailed：
 NSLog（@邮件失败：电子邮件未保存或排队，可能是由于错误。 
 break; 
 default：
 NSLog（@Mail not sent。）; 
 break; 
} 
 
 //删除邮件视图
 [self dismissModalViewControllerAnimated：YES]; 
  

正在成功创建 - 我检查了模拟器文件。

   - （void）exportData 
 {
 NSArray * paths = NSSearchPathForDirectoriesInDomains（NSDocumentDirectory，NSUserDomainMask，YES）; 
 NSString * documentsDir = [paths objectAtIndex：0]; 
 NSString * root = [documentsDir stringByAppendingPathComponent：@expenses.csv]; 
 NSString * temp = @日期，目的，开始里程表，最终里程表，总驱动，费用; （int i = 0; i< expenses.count; i ++）{
 VehicleExpense * tempExpense = [expenses objectAtIndex：i]; 
 
 temp = [temp stringByAppendingString：tempExpense.date]; 
 temp = [temp stringByAppendingString：@，]; 
 temp = [temp stringByAppendingString：tempExpense.purpose]; 
 temp = [temp stringByAppendingString：@，]; 
 temp = [temp stringByAppendingString：[NSString stringWithFormat：@％。02f，tempExpense.start_mile]]; 
 temp = [temp stringByAppendingString：@，]; 
 temp = [temp stringByAppendingString：[NSString stringWithFormat：@％。02f，tempExpense.end_mile]]; 
 temp = [temp stringByAppendingString：@，]; 
 temp = [temp stringByAppendingString：[NSString stringWithFormat：@％。02f，tempExpense.distance]]; 
 temp = [temp stringByAppendingString：@，]; 
 temp = [temp stringByAppendingString：[NSString stringWithFormat：@％。02f，tempExpense.fees]]; 
 temp = [temp stringByAppendingString：@，]; 
} 
 [temp writeToFile：root atomically：YES encoding：NSUTF8StringEncoding error：NULL]; 
 NSLog（@在这里出口数据---％@，documentsDir）; 
 
} 
  

解决方案

b $ b [mailer addAttachmentData：myData mimeType：@text / csvfileName：@expenses.csv];

编辑：
这是我在我的应用程序中使用的代码：

   - （IBAction）ExportData：（id）sender 
 {
 NSArray * paths = NSSearchPathForDirectoriesInDomains（NSDocumentDirectory，NSUserDomainMask，YES）; 
 NSString * documentsDirectory = [paths objectAtIndex：0]; 
 NSString * filePath = [documentsDirectory stringByAppendingPathComponent：kExportFileName]; 
 
 self.timeRecords = [[NSMutableArray alloc] init]; （int i = 0; i< [self.selectedTimeEntries count]; i ++）
 for（int j = 0; j [[self.selectedTimeEntries objectAtIndex：i] count]; j ++）
 if（[[self.selectedTimeEntries objectAtIndex：i] objectAtIndex：j] == [NSNumber numberWithBool：YES]）
 [self.timeRecords addObject：[self.uniqueArray objectAtIndex：i] forIndex ：J]]; 
 
 if（！（[self.timeRecords count]！= 0））
 {
 UIAlertView * alert = [[UIAlertView alloc] initWithTitle：@没有时间条目选择！消息：@请至少选择一个时间条目，然后继续委托：self cancelButtonTitle：@OKotherButtonTitles：nil]; 
 [alert show]; 
 [alert release]; 
 return; 
} 
 NSMutableString * csvLine; 
 NSError * err = nil; 
 NSDateFormatter * dateFormatter = [[NSDateFormatter alloc] init]; 
 [dateFormatter setDateFormat：@yyyy-MM-dd]; 
 NSString * dateString = nil; 
 NSNumberFormatter * numberFormatter = [[NSNumberFormatter alloc] init]; 
 [numberFormatter setPositiveFormat：@### 0。##]; 
 NSString * formattedNumberString = nil; 
 
 if（！[[NSFileManager defaultManager] fileExistsAtPath：filePath]）
 {
 [[NSFileManager defaultManager] createFileAtPath：filePath内容：nil属性：nil]; 
} 
 
 for（timeEntries * timeEntry in self.timeRecords）{
 csvLine = [NSMutableString stringWithString：timeEntry.client]; 
 [csvLine appendString：@，]; 
 [csvLine appendString：timeEntry.category]; 
 [csvLine appendString：@，]; 
 [csvLine appendString：timeEntry.task]; 
 [csvLine appendString：@，]; 
 dateString = [dateFormatter stringFromDate：[NSDate dateWithTimeIntervalSince1970：timeEntry.date]]; 
 [csvLine appendString：dateString]; 
 [csvLine appendString：@，]; 
 formattedNumberString = [numberFormatter stringFromNumber：timeEntry.duration]; 
 [csvLine appendString：formattedNumberString]; 
 [csvLine appendString：@，]; 
 [csvLine appendString：timeEntry.description]; 
 [csvLine appendString：@\\\
]; 
 
 if（[[NSFileManager defaultManager] fileExistsAtPath：filePath]）
 {
 NSString * oldFile = [[NSString alloc] initWithContentsOfFile：filePath]; 
 [csvLine insertString：oldFile atIndex：0]; 
 BOOL success = [csvLine writeToFile：filePath atomically：NO encoding：NSUTF8StringEncoding error：& err]; 
 if（success）{
 
} 
 [oldFile release]; 
} 
} 
如果（！appDelegate.shouldSendCSV）{
 self.csvText = csvLine; 
} 
 if（[[NSFileManager defaultManager] fileExistsAtPath：filePath]）
 {
 [self emailExport：filePath]; 
} 
 self.selectedTimeEntries = nil; 
 self.navigationController.toolbarHidden = NO; 
 
 
 
  - （void）emailExport：（NSString *）filePath 
 {
 NSLog（@应发送CSV =％@，[ NSNumber numberWithBool：appDelegate.shouldSendCSV]）; 
 MFMailComposeViewController * picker = [[MFMailComposeViewController alloc] init]; 
 picker.mailComposeDelegate = self; 
 
 //设置邮件主题
 [picker setSubject：@My Billed Time Export]; 
 
 //添加电子邮件地址
 //注意三个部分：到cc和bcc
 
 NSString * valueForEmail = [[NSUserDefaults standardUserDefaults] stringForKey：@ emailEntry]; 
 NSString * valueForCCEmail = [[NSUserDefaults standardUserDefaults] stringForKey：@ccEmailEntry]; 
 if（valueForEmail == nil || [valueForEmail isEqualToString：@] 
 {
 UIAlertView * alert = [[UIAlertView alloc] initWithTitle：@请在发送之前设置一个电子邮件地址一次入场！消息：@您可以稍后从应用程序的设置菜单中更改此地址！委托：self cancelButtonTitle：@OKotherButtonTitles：nil]; 
 [alert show]; 
 [alert release]; 
 
 return; 
} 
 else {
 [选择器setToRecipients：[NSArray arrayWithObjects：valueForEmail，nil]]; 
 
 
 if（valueForCCEmail！= nil ||！[valueForCCEmail isEqualToString：@] 
 {
 [选择器setCcRecipients：[NSArray arrayWithObjects：valueForCCEmail，零]]; 
} 
 
 //填写电子邮件正文文本
 NSString * emailBody = @我的计费时间导出文件; 
 
 //这不是HTML格式的电子邮件
 [picker setMessageBody：emailBody isHTML：NO]; 
 
 if（appDelegate.shouldSendCSV）{
 
 //从文件
创建NSData对象NSData * exportFileData = [NSData dataWithContentsOfFile：filePath]; 
 
 //将图像数据附加到电子邮件
 [picker addAttachmentData：exportFileData mimeType：@text / csvfileName：@MyFile.csv]; 
} else {
 [picker setMessageBody：self.csvText isHTML：NO]; 
} 
 //显示电子邮件视图
 [self presentModalViewController：picker animated：YES]; 
 
 //发布选择器
 [选择器释放]; 
} 
  

I am writing an iPhone app that requires that I send an e-mail attachment programmatically. The attachment is a csv file, that I create through the code. I then attach the file to the email, and the attachment shows up on the phone. When I send the email to myself, however, the attachment doesn't appear in the e-mail. Here is the code I'm using.

    [self exportData];

if ([MFMailComposeViewController canSendMail])
{
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"expenses" ofType:@"csv"];  
    NSData *myData = [NSData dataWithContentsOfFile:filePath]; 

    MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];

    mailer.mailComposeDelegate = self;

    [mailer setSubject:@"Vehicle Expenses from myConsultant"];

    NSString *emailBody = @"";
    [mailer setMessageBody:emailBody isHTML:NO];

    [mailer addAttachmentData:myData mimeType:@"text/plain" fileName:@"expenses"];

    [self presentModalViewController:mailer animated:YES];

    [mailer release]; 
}
else
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Failure"
                                                    message:@"Your device doesn't support the composer sheet"
                                                   delegate:nil
                                          cancelButtonTitle:@"OK"
                                          otherButtonTitles:nil];
    [alert show];
    [alert release];
}
}
- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
    switch (result)
    {
        case MFMailComposeResultCancelled:
            NSLog(@"Mail cancelled: you cancelled the operation and no email message was queued.");
            break;
        case MFMailComposeResultSaved:
            NSLog(@"Mail saved: you saved the email message in the drafts folder.");
            break;
        case MFMailComposeResultSent:
            NSLog(@"Mail send: the email message is queued in the outbox. It is ready to send.");
            break;
        case MFMailComposeResultFailed:
            NSLog(@"Mail failed: the email message was not saved or queued, possibly due to an error.");
        break;
        default:
            NSLog(@"Mail not sent.");
        break;
}

// Remove the mail view
[self dismissModalViewControllerAnimated:YES];

The is being successfully created- I checked in the simulator files.

- (void) exportData
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES); 
    NSString *documentsDir = [paths objectAtIndex:0];
    NSString *root = [documentsDir stringByAppendingPathComponent:@"expenses.csv"];
    NSString *temp=@"Date,Purpose,Start Odometer,End Odometer, Total Driven, Fees, ";
    for(int i = 0; i < expenses.count; i++){
        VehicleExpense *tempExpense = [expenses objectAtIndex:i];
        temp = [temp stringByAppendingString:tempExpense.date];
        temp = [temp stringByAppendingString:@", "];
        temp = [temp stringByAppendingString:tempExpense.purpose];
        temp = [temp stringByAppendingString:@", "];
        temp = [temp stringByAppendingString:[NSString stringWithFormat: @"%.02f",tempExpense.start_mile]];
        temp = [temp stringByAppendingString:@", "];
        temp = [temp stringByAppendingString:[NSString stringWithFormat: @"%.02f",tempExpense.end_mile]];
        temp = [temp stringByAppendingString:@", "];
        temp = [temp stringByAppendingString:[NSString stringWithFormat: @"%.02f",tempExpense.distance]];
        temp = [temp stringByAppendingString:@", "];
        temp = [temp stringByAppendingString:[NSString stringWithFormat: @"%.02f",tempExpense.fees]];
        temp = [temp stringByAppendingString:@", "];
    }
    [temp writeToFile:root atomically:YES encoding:NSUTF8StringEncoding error:NULL];
    NSLog(@"got here in export data--- %@", documentsDir);

}

解决方案

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

Edit: This is the code I'm using in my app:

- (IBAction) ExportData:(id)sender
{       
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *filePath = [documentsDirectory stringByAppendingPathComponent:kExportFileName];

    self.timeRecords = [[NSMutableArray alloc] init];
    for (int i=0; i< [self.selectedTimeEntries count]; i++) 
        for (int j=0; j<[[self.selectedTimeEntries objectAtIndex:i] count]; j++) 
            if ([[self.selectedTimeEntries objectAtIndex:i] objectAtIndex:j] == [NSNumber numberWithBool:YES]) 
                [self.timeRecords addObject:[self timeEntriesForDay:[self.uniqueArray objectAtIndex:i] forIndex:j]];

    if( !([self.timeRecords count]!=0))
    {
        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"There are no time entries selected!" message:@"Please select at least one time entry before proceeding" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        [alert release];        
        return;
    }
    NSMutableString *csvLine;
    NSError *err = nil;
    NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd"];
    NSString *dateString = nil;
    NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
    [numberFormatter setPositiveFormat:@"###0.##"];
    NSString *formattedNumberString = nil;

    if(![[NSFileManager defaultManager] fileExistsAtPath:filePath])        
    {
        [[NSFileManager defaultManager] createFileAtPath:filePath contents:nil attributes:nil];
    }

    for (timeEntries *timeEntry in self.timeRecords) {
        csvLine = [NSMutableString stringWithString:timeEntry.client];
        [csvLine appendString:@","];
        [csvLine appendString:timeEntry.category];
        [csvLine appendString:@","];
        [csvLine appendString:timeEntry.task];
        [csvLine appendString:@","];
        dateString = [dateFormatter stringFromDate:[NSDate dateWithTimeIntervalSince1970:timeEntry.date]];
        [csvLine appendString:dateString];
        [csvLine appendString:@","];
        formattedNumberString = [numberFormatter stringFromNumber:timeEntry.duration];
        [csvLine appendString:formattedNumberString];
        [csvLine appendString:@","];
        [csvLine appendString:timeEntry.description];
        [csvLine appendString:@"\n"];

        if([[NSFileManager defaultManager] fileExistsAtPath:filePath])        
        {     
            NSString *oldFile = [[NSString alloc] initWithContentsOfFile:filePath];
            [csvLine insertString:oldFile atIndex:0];
            BOOL success =[csvLine writeToFile:filePath atomically:NO encoding:NSUTF8StringEncoding error:&err];
            if(success){

            }
            [oldFile release];
        }
    } 
    if (!appDelegate.shouldSendCSV) {
    self.csvText = csvLine;
    }
    if([[NSFileManager defaultManager] fileExistsAtPath:filePath])        
    {
        [self emailExport:filePath];
    }   
    self.selectedTimeEntries =nil;
    self.navigationController.toolbarHidden = NO;
}


- (void)emailExport:(NSString *)filePath
{
    NSLog(@"Should send CSV = %@", [NSNumber numberWithBool:appDelegate.shouldSendCSV]);
    MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate = self;

    // Set the subject of email
    [picker setSubject:@"My Billed Time Export"];

    // Add email addresses
    // Notice three sections: "to" "cc" and "bcc"   

    NSString *valueForEmail = [[NSUserDefaults standardUserDefaults] stringForKey:@"emailEntry"];
    NSString *valueForCCEmail = [[NSUserDefaults standardUserDefaults] stringForKey:@"ccEmailEntry"];
    if( valueForEmail == nil ||  [valueForEmail isEqualToString:@""])
    {
        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Please set an email address before sending a time entry!" message:@"You can change this address later from the settings menu of the application!" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        [alert release];        

        return;
    }
    else {
        [picker setToRecipients:[NSArray arrayWithObjects:valueForEmail, nil]];
    }

    if(valueForCCEmail != nil || ![valueForCCEmail isEqualToString:@""])
    {
        [picker setCcRecipients:[NSArray arrayWithObjects:valueForCCEmail, nil]];
    }

    // Fill out the email body text
    NSString *emailBody = @"My Billed Time Export File.";

    // This is not an HTML formatted email
    [picker setMessageBody:emailBody isHTML:NO];

    if (appDelegate.shouldSendCSV) {

    // Create NSData object from file
    NSData *exportFileData = [NSData dataWithContentsOfFile:filePath];

    // Attach image data to the email 
    [picker addAttachmentData:exportFileData mimeType:@"text/csv" fileName:@"MyFile.csv"];
    } else {
        [picker setMessageBody:self.csvText isHTML:NO];
    }
    // Show email view  
    [self presentModalViewController:picker animated:YES];

    // Release picker
    [picker release];
}

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