如何使用UIBarButtonItem发送电子邮件

Question

  

可能重复：
  how to send email using UIbarbuttonitem without using MFMailComposerViewController

如图所示，此应用程序用于通过发送按钮的点击发送邮件。

我发现它没有显示MFMailComposerViewController。

怎么可能？我如何获得此功能？

Answer 1

- (void)MailButton:(id)sender
{
    if ([MFMailComposeViewController canSendMail]) {
        //atableView.scrollEnabled=YES;
        //[socailNetworkView removeFromSuperview];
    //  self.navigationItem.title = @"Contents";
        MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];
        mailViewController.mailComposeDelegate = self;
        [mailViewController setSubject:@""];
        [mailViewController setMessageBody:@"" isHTML:NO];
        NSString *string = [NSString stringWithFormat:@"", nil];


        NSArray *mailArr = [[NSArray alloc] initWithObjects:string,nil];
        [mailViewController setToRecipients:mailArr];
        [self presentModalViewController:mailViewController animated:YES];
        [mailViewController release];

    }

    else {

        NSLog(@"Device is unable to send email in its current state");

    }
}


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

{

    NSLog(@"Mail");
    NSString  *str=@"";
    switch (result) {  
        case MFMailComposeResultCancelled:  
            NSLog(@"Mail send canceled.");  
            str=@"\nMail sending cancelled";
            //msgLabel.text=str;
            //          [msgLabel setFont:[UIFont fontWithName:@"Arial" size:18]];
            //          msgLabel.textColor=[UIColor colorWithRed:(54.0/255.0) green:(2.0/255) blue:(1.0/255) alpha:1.0];

            /* 
             Execute your code for canceled event here ... 
             */  
            break;  
        case MFMailComposeResultSaved:  
            NSLog(@"Mail saved."); 
            str=@"Mail saved";
            /* 
             Execute your code for email saved event here ... 
             */  
            break;  
        case MFMailComposeResultSent:  
            NSLog(@"Mail sent.");  
            str=@"Mail sent";
            /* 
             Execute your code for email sent event here ... 
             */  
            break;  
        case MFMailComposeResultFailed:  
            str=@"Mail not sent";
            NSLog(@"Mail send error: %@.", [error localizedDescription]);  
            /* 
             Execute your code for email send failed event here ... 
             */  
            break;  
        default:  
            break;  
    }
    //alertLabel.text=str;
    //  [viewAlert setBackgroundColor:[UIColor clearColor]];
    //  [self.view addSubview:viewAlert];

    [self dismissModalViewControllerAnimated:YES];
}

Answer 2

听起来你需要仔细阅读教程。

我是通过Google找到的：

New In iPhone 3.0 Tutorial Series, Part 2: In App Email, MessageUI

是的，它说的是“iPhone 3.0”，但相同的概念和代码应该在iOS 5中完美运行。