如何設置MFMailComposeViewController從字段而不是默認郵件應用程序

Question

如何設置MFMailComposeViewController從字段而不是默認郵件來自字段。我正在構建一個具有不同電子郵件ID註冊的應用程序，我想同步這些ID並從這些帳戶發送郵件。

Answer 1

我不認爲你可以改變From，因爲MFMailComposeViewController用於與iOS中的settings註冊電子郵件賬戶發送郵件，不您用於登錄您的應用的郵件地址。

Answer 2

試試這個代碼

- (IBAction)openMail:(id)sender 
{ 
    if ([MFMailComposeViewController canSendMail]) 
{ 
    MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init]; 

    mailer.mailComposeDelegate = self; 

    [mailer setSubject:@"A Message from MobileTuts+"]; 

    NSArray *toRecipients = [NSArray arrayWithObjects:@"fisrtMail@example.com", @"secondMail@example.com", nil]; 
    [mailer setToRecipients:toRecipients]; 

    UIImage *myImage = [UIImage imageNamed:@"mobiletuts-logo.png"]; 
    NSData *imageData = UIImagePNGRepresentation(myImage); 
    [mailer addAttachmentData:imageData mimeType:@"image/png" fileName:@"mobiletutsImage"]; 

    NSString *emailBody = @"Have you seen the MobileTuts+ web site?"; 
    [mailer setMessageBody:emailBody isHTML:NO]; 

    [self presentModalViewController:mailer animated:YES]; 


} 
    else 
    { 
     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Failure" 
                 message:@"Your device doesn't support the composer sheet" 
                 delegate:nil 
               cancelButtonTitle:@"OK" 
               otherButtonTitles:nil]; 
     [alert show]; 

    } 

} 

的檢查結果

- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
{ 
    switch (result) 
    { 
     case MFMailComposeResultCancelled: 
      NSLog(@"Mail cancelled: you cancelled the operation and no email message was queued."); 
      break; 
     case MFMailComposeResultSaved: 
      NSLog(@"Mail saved: you saved the email message in the drafts folder."); 
      break; 
     case MFMailComposeResultSent: 
      NSLog(@"Mail send: the email message is queued in the outbox. It is ready to send."); 
      break; 
     case MFMailComposeResultFailed: 
      NSLog(@"Mail failed: the email message was not saved or queued, possibly due to an error."); 
      break; 
     default: 
      NSLog(@"Mail not sent."); 
      break; 
    } 

     // Remove the mail view 
    [self dismissModalViewControllerAnimated:YES]; 
}