MFMailComposeViewController extracted from UIViewController

mailman.h

#import <UIKit/UIKit.h>
#import <MessageUI/MessageUI.h>
#import <MessageUI/MFMailComposeViewController.h>

@interface MailMan : NSObject <MFMailComposeViewControllerDelegate> {
}

@property (nonatomic) UIViewController *vc;

- (id)initWithParentVC:(UIViewController *)vc;
- (void)emailWithSubject: (NSString *)subject andHTML:(NSString*)html;
- (void)emailWithSubject: (NSString *)subject andText:(NSString*)text;
- (void)emailWithSubject: (NSString *)subject andMessage:(NSString*)string isHTML:(BOOL)html;

@end

mailman.m

#import "mailman.h"

@implementation MailMan

- (id)initWithParentVC:(UIViewController *)vc
{
  self = [super init];
  if(self) {
    NSLog(@"_init: %@", self);
    self.vc = vc;
  }
  return self;
}

- (void)emailWithSubject: (NSString *)subject andText:(NSString*)text {
  [self emailWithSubject:subject andMessage:text isHTML:NO];
}

- (void)emailWithSubject: (NSString *)subject andHTML:(NSString*)html {
  [self emailWithSubject:subject andMessage:html isHTML:YES];
}

- (void)emailWithSubject: (NSString *)subject andMessage:(NSString*)string isHTML:(BOOL)isHTML
{
  if ([MFMailComposeViewController canSendMail]) {
    MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];
    mailViewController.mailComposeDelegate = self;
    [mailViewController setSubject:subject];
    [mailViewController setMessageBody:string isHTML:isHTML];

    [self.vc presentViewController:mailViewController animated:YES completion:nil];
  } else {
    NSLog(@"Device is unable to send email in its current state.");
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No Email Account" message:@"You have not configured this device for sending email." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
  }
}

- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error {

  UIAlertView *alert;
  switch (result) {
    case MFMailComposeResultCancelled:
      NSLog(@"Mail Cancelled");
      alert = [[UIAlertView alloc] initWithTitle:@"Email Feedback:" message:@"Mail Cancelled." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
      [alert show];
      break;
    case MFMailComposeResultSaved:
      NSLog(@"Mail Saved");
      alert = [[UIAlertView alloc] initWithTitle:@"Email Feedback:" message:@"Mail Saved." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
      [alert show];
      break;
    case MFMailComposeResultSent:
      NSLog(@"Sent Mail");
      alert = [[UIAlertView alloc] initWithTitle:@"Email Feedback:" message:@"Sent Mail." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
      [alert show];
      break;
    case MFMailComposeResultFailed:
      NSLog(@"Mail Failed");
      NSLog(@"%@", error.localizedDescription);
      alert = [[UIAlertView alloc] initWithTitle:@"Email Feedback:" message:[NSString stringWithFormat:@"Mail Failed: %@", error.localizedDescription] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
      [alert show];
      break;
    default:
      break;
  }
  [self.vc dismissViewControllerAnimated:YES completion:nil];
}

@end

usage.md

Usage:

# RubyMotion:
# In your rakefile:
app.vendor_project("vendor/MailMan", :static, :cflags => '-fobjc-arc')

# In your View Controller:
@mailman ||= MailMan.alloc.initWithParentVC(WeakRef.new(self))
@mailman.emailWithSubject('Subject', andText: 'body')

mailman = [[MailMan alloc] initWithParentVC:self];
[mailman emailWithSubject:'Subject' andText: 'body'];