Email CSV file with MFMailComposer - ios

Question

I would like to create a file using a NSString (already made) with a .csv extension then email it using the UIMessage framework. So can someone show me the code to create a file (with a .csv extensions and with the contents of a NSString) then how to attach it to a MFMailComposeViewController.

Answer 1

This is how you attach a CSV file to a MFMailComposeViewController:
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.
As far as how to generate the CSV file itself, the CHCSVWriter class at https://github.com/davedelong/CHCSVParser will help you.

Answer 2

Here are the parts where you create a new csv, save it to file and attach it all in one. You know, if you're in to that sort of thing
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];
}