Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));

    if (!mailClass) {

        UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:@"发送邮件"

                                                         message:@"当前系统版本不支持应用内发送邮件功能，您可以使用mailto方法代替"

                                                        delegate:self

                                               cancelButtonTitle:@"我知道啦"

                                               otherButtonTitles: nil] autorelease];

        [alert show];

        return;

    }

    if (![mailClass canSendMail]) {

        UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:@"发送邮件"

                                                         message:@"用户没有设置邮件账户"

                                                        delegate:self

                                               cancelButtonTitle:@"我知道啦"

                                               otherButtonTitles: nil] autorelease];

        [alert show];

        return;

    }

    MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];

    mc.mailComposeDelegate = self;

    [mc setSubject:@"Hello, World!"];

    [mc setToRecipients:[NSArray arrayWithObject:@"xxxxx@163.com"]];

//    [mc setCcRecipients:[NSArray arrayWithObject:@"xxxxx@163.com"]];

//    [mc setBccRecipients:[NSArray arrayWithObject:@"secret@gmail.com"]];

    [mc setMessageBody:@"Hello,slick!!!\n\nCome here, I need you!" isHTML:NO];

    // 添加一张图片

    UIImage *addPic = [UIImage imageNamed: @"Icon@2x.png"];

    NSData *imageData = UIImagePNGRepresentation(addPic);            // png

    [mc addAttachmentData: imageData mimeType: @"" fileName: @"Icon.png"];

    //添加一个pdf附件

    NSString *file = [self fullBundlePathFromRelativePath:@"高质量C++编程指南.pdf"];

    NSData *pdf = [NSData dataWithContentsOfFile:file];

    [mc addAttachmentData: pdf mimeType: @"" fileName: @"高质量C++编程指南.pdf"];

    [self presentViewController:mc animated:YES completion:nil];

    [mc release];

- (void)mailComposeController:(MFMailComposeViewController*)controller

          didFinishWithResult:(MFMailComposeResult)result

                        error:(NSError*)error {

    switch (result)

    {

        case MFMailComposeResultCancelled:

            NSLog(@"Mail send canceled...");

            break;

        case MFMailComposeResultSaved:

            NSLog(@"Mail saved...");

            break;

        case MFMailComposeResultSent:

            NSLog(@"Mail sent...");

            break;

        case MFMailComposeResultFailed:

            NSLog(@"Mail send errored: %@...", [error localizedDescription]);

            break;

        default:

            break;

    }

    [self dismissViewControllerAnimated:YES completion:nil];

}

#pragma mark - 使用系统邮件客户端发送邮件

-(void)launchMailApp

{

    NSMutableString *mailUrl = [[[NSMutableString alloc]init]autorelease];

    //添加收件人

    NSArray *toRecipients = [NSArray arrayWithObject: @"first@example.com"];

    [mailUrl appendFormat:@"mailto:%@", [toRecipients componentsJoinedByString:@","]];

    //添加抄送

    NSArray *ccRecipients = [NSArray arrayWithObjects:@"second@example.com", @"third@example.com", nil];

    [mailUrl appendFormat:@"?cc=%@", [ccRecipients componentsJoinedByString:@","]];

    //添加密送

    NSArray *bccRecipients = [NSArray arrayWithObjects:@"fourth@example.com", nil];

    [mailUrl appendFormat:@"&bcc=%@", [bccRecipients componentsJoinedByString:@","]];

    //添加主题

    [mailUrl appendString:@"&subject=my email"];

    //添加邮件内容

    [mailUrl appendString:@"&body=<b>email</b> body!"];

    NSString* email = [mailUrl stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];

    [[UIApplication sharedApplication] openURL: [NSURL URLWithString:email]];

}