try this code
if ([MFMailComposeViewController canSendMail]) {
mailComposer = [[MFMailComposeViewController alloc]init];
mailComposer.mailComposeDelegate = self;
[mailComposer setToRecipients:@[@"yourmail@com"]];
[mailComposer setSubject:@"Subject"];
[mailComposer setMessageBody:@"hello \n" isHTML:NO];
[self presentViewController:mailComposer animated:YES completion:nil];
}
else{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Error"
message:@"can not send mail with this device"
delegate:nil
cancelButtonTitle:@"Ok"
otherButtonTitles:nil, nil];
[alert show];
}
pragma mark MFMailComposeViewControllerDelegate
-(void)mailComposeController:(MFMailComposeViewController *)controller
didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error{
if (result) {
NSLog(@"Result : %d",result);
}
if (error) {
NSLog(@"Error : %@",error);
}
[self dismissViewControllerAnimated:YES completion:nil];
}