Question

我遇到通过MFMailComposeViewController发送csv附件的问题。有时候它们会很好地通过，但对于其他用户来说，它们并不是作为附件而来的，而是作为电子邮件中的文本内联（使用＆lt; br /＆gt;而不是行返回）。这很奇怪。谁知道我做错了什么？以下是我的代码片段：

MFMailComposeViewController *mailComposeViewController = [[MFMailComposeViewController alloc] init];
mailComposeViewController.mailComposeDelegate = self;

NSString *csv = @"foo,bar,blah,hello";
NSData *csvData = [csv dataUsingEncoding:NSUTF8StringEncoding];
[mailComposeViewController addAttachmentData:csvData mimeType:@"text/csv" fileName:@"testing.csv"];

[mailComposeViewController setSubject:@"testing sending csv attachment"];
[mailComposeViewController setMessageBody:@"csv file should be attached" isHTML:NO];
[self presentModalViewController:mailComposeViewController animated:YES];

Answer 1

-(IBAction)btnPressed:(id)sender {
    NSArray *arrayPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
    NSString *docDir = [arrayPaths objectAtIndex:0];
    NSString *Path = [docDir stringByAppendingString:@"/CSVFile.csv"];
    NSData *csvData = [NSData dataWithContentsOfFile:Path]; 

    MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init];
    controller.mailComposeDelegate = self;

    [controller setSubject:@"For csv file..."];
    [controller setMessageBody:@"...csv file is hear.." isHTML:NO];
    [controller addAttachmentData:csvData mimeType:@"text/csv" fileName:@"CSVFile.csv"];
    [self presentModalViewController:controller animated:YES];
    [controller release];
}

Answer 2

您好我为创建CSV文件添加了示例代码并将其附加到邮件中，但请确保您必须添加MessageUI.Framework并导入其相关标题“MessageUI / MessageUI.h” “MessageUI / MFMailComposeViewController.h”和deligate“MFMailComposeViewControllerDelegate”...我希望这对其他人有用

- (void)viewDidLoad {

arrCsv=[[NSArray alloc]initWithObjects:@"Hello",@"Hi",@"traun",@"fine",nil];
NSArray *paths = NSSearchPathForDirectoriesInDomains

(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

NSString *fileName = [NSString stringWithFormat:@"%@/try.csv", documentsDirectory];

[[arrCsv componentsJoinedByString:@","] writeToFile:fileName atomically:YES encoding:NSUTF8StringEncoding error:NULL];

 }



-(ibAction)btnMail   {

 NSArray *arrayPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString *docDir = [arrayPaths objectAtIndex:0];
NSString *Path = [docDir stringByAppendingString:@"/CSVFile.csv"];
NSData *csvData = [NSData dataWithContentsOfFile:Path]; 
MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init];
controller.mailComposeDelegate = self;
[controller setSubject:@"For csv file..."];
[controller setMessageBody:@"...csv file is hear.." isHTML:NO];
[controller addAttachmentData:csvData mimeType:@"text/csv" fileName:@"CSVFile.csv"];
[self presentModalViewController:controller animated:YES];
[controller release];

}


- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
{   message.hidden = NO;
switch (result)
{
    case MFMailComposeResultCancelled:
        message.text = @"Result: canceled";
        break;
    case MFMailComposeResultSaved:
        message.text = @"Result: saved";
        break;
    case MFMailComposeResultSent:
        message.text = @"Result: sent";
        break;
    case MFMailComposeResultFailed:
        message.text = @"Result: failed";
        break;
    default:
        message.text = @"Result: not sent";
        break;
}
[self dismissModalViewControllerAnimated:YES];
}

Answer 3

将mime类型设置为“application / octet-stream”，这应该可以删除内联附件（我仍然将文件的扩展命名为pdf）

Answer 4

我认为setMessageBody:isHTML:的第二个参数必须为YES，以便附件不显示内联。

Answer 5

即使您将isHTML参数设置为YES，如果可以像这样表示消息正文，也可以将您的消息正文作为普通/文本发送。某些电子邮件客户端（Outlook）无法始终正确识别普通邮件中的附件。

在我的案例中，在邮件正文中添加了一个链接。使用HTML标记将文本格式设置为粗体也可以。棘手！

在iPod 1G 3.1.3上测试过。

Answer 6

这可能不是这种情况，但需要注意的一点是：

[NSString dataUsingEncoding:]

如果无法转换为指定的编码，则

返回有效但空的NSData对象。最好使用完整版：

[NSString dataUsingEncoding: s allowLossyConversion: YES]

或检查返回数据的长度。看来零邮件数据附件在邮件进程的某处被修剪。

MFMailComposeViewController csv附件未附加，但显示为内联

6 个答案: