Ios 使用MFMailComposer通过电子邮件发送CSV文件

我想使用扩展名为.csv的NSString（已创建）创建一个文件，然后使用UIMessage框架通过电子邮件发送。有人能告诉我创建文件（扩展名为.csv，内容为NSString）的代码，然后如何将其附加到MFMailComposeViewController。

这是如何将csv文件附加到MFMailComposeViewController的：

    MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];
    mailer.mailComposeDelegate = self;
    [mailer setSubject:@"CSV File"];        
    [mailer addAttachmentData:[NSData dataWithContentsOfFile:@"PathToFile.csv"]
                     mimeType:@"text/csv" 
                     fileName:@"FileName.csv"];
    [self presentModalViewController:mailer animated:YES];

    // Note: PathToFile.csv is the actual path of the file on your iOS device's 
    // file system. FileName.csv is what it should be displayed as in the email. 

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至于如何生成CSV文件本身，位于的CHCSVWriter类将帮助您。

以下是创建新CSV、将其保存到文件并将其全部附加到一个文件中的部分。你知道，如果你参与了这类事情

NSString *emailTitle = @"My Email Title";
NSString *messageBody = @"Email Body";

MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];
mc.mailComposeDelegate = self;
[mc setSubject:emailTitle];
[mc setMessageBody:messageBody isHTML:NO];
[mc setToRecipients:@[]];

NSMutableString *csv = [NSMutableString stringWithString:@""];

//add your content to the csv
[csv appendFormat:@"MY DATA YADA YADA"];

NSString* filePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString* fileName = @"MyCSVFileName.csv";
NSString* fileAtPath = [filePath stringByAppendingPathComponent:fileName];

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

BOOL res = [[csv dataUsingEncoding:NSUTF8StringEncoding] writeToFile:fileAtPath atomically:NO];

if (!res) {
    [[[UIAlertView alloc] initWithTitle:@"Error Creating CSV" message:@"Check your permissions to make sure this app can create files so you may email the app data" delegate:nil cancelButtonTitle:@"Okay" otherButtonTitles: nil] show];
}else{
    NSLog(@"Data saved! File path = %@", fileName);
    [mc addAttachmentData:[NSData dataWithContentsOfFile:fileAtPath]
                     mimeType:@"text/csv"
                     fileName:@"MyCSVFileName.csv"];
    [self presentViewController:mc animated:YES completion:nil];
}

---

你试过什么？有一个名为

addAttachmentData:mimeType:fileName:

的方法。斯蒂芬·达林顿：是的，我知道如何使用它，但我真的只是想知道如何制作一个CSV文件，然后将其压缩成NSData，以便我可以附加它。