iOS：实现邮件和短信发送的简单示例

发送邮件
1.导入库文件:MessageUI.framework
2.引入头文件
3.实现代理<MFMailComposeViewControllerDelegate> 和 <UINavigationControllerDelegate>
代码示例:

- (void)didClickSendEmailButtonAction{  

    if ([MFMailComposeViewController canSendMail] == YES) {  

        MFMailComposeViewController *mailVC = [[MFMailComposeViewController alloc] init];
        //  设置代理(与以往代理不同,不是"delegate",千万不能忘记呀,代理有3步)
        mailVC.mailComposeDelegate = self;
        //  收件人
        NSArray *sendToPerson = @[@"humingtao2014@gmail.com"];
        [mailVC setToRecipients:sendToPerson];
        //  抄送
        NSArray *copyToPerson = @[@"humingtao2013@126.com"];
        [mailVC setCcRecipients:copyToPerson];
        //  密送
        NSArray *secretToPerson = @[@"563821250@qq.com"];
        [mailVC setBccRecipients:secretToPerson];
        //  主题
        [mailVC setSubject:@"hello world"];
        [self presentViewController:mailVC animated:YES completion:nil];
        [mailVC setMessageBody:@"魑魅魍魉,哈哈呵呵嘿嘿霍霍" isHTML:NO];
    }else{  

        NSLog(@"此设备不支持邮件发送");  

    }  

}  

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

    switch (result) {
        case MFMailComposeResultCancelled:
            NSLog(@"取消发送");
            break;
        case MFMailComposeResultFailed:
            NSLog(@"发送失败");
            break;
        case MFMailComposeResultSaved:
            NSLog(@"保存草稿文件");
            break;
        case MFMailComposeResultSent:
            NSLog(@"发送成功");
            break;
        default:
            break;
    }  

    [self dismissViewControllerAnimated:YES completion:nil];
}  

//  系统发送,模拟器不支持,要用真机测试
- (void)didClickSendSystemEmailButtonAction{  

    NSURL *url = [NSURL URLWithString:@"humingtao2014@gmail.com"];
    if ([[UIApplication sharedApplication] canOpenURL:url] == YES) {  

        [[UIApplication sharedApplication] openURL:url];  

    }else{  

        NSLog(@"此设备不支持");
    }  

} 

发送短信
前面三步引入配置和邮件发送一样

//  调用系统API发送短信
- (void)didClickSendMessageButtonAction{  

    if ([MFMessageComposeViewController canSendText] == YES) {  

        MFMessageComposeViewController *messageVC = [[MFMessageComposeViewController alloc] init];
        //  设置代理<MFMessageComposeViewControllerDelegate>
        messageVC.messageComposeDelegate = self;
        //  发送To Who
        messageVC.recipients = @[@""];
        messageVC.body = @"hello world";
        [self presentViewController:messageVC animated:YES completion:nil];  

    }else{  

        NSLog(@"此设备不支持");
    }
}  

- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result{  

    switch (result) {
        case MessageComposeResultCancelled:
            NSLog(@"取消发送");
            break;
        case MessageComposeResultFailed:
            NSLog(@"发送失败");
            break;
        case MessageComposeResultSent:
            NSLog(@"发送成功");
            break;
        default:
            break;
    }  

    [self dismissViewControllerAnimated:YES completion:nil];  

}  

//  调用系统应用程序发送消息
- (void)didClickSendMessage2ButtonAction{  

    NSURL *url = [NSURL URLWithString:@"sms:18656348970"];
    if ([[UIApplication sharedApplication] canOpenURL:url] == YES) {  

        [[UIApplication sharedApplication] openURL:url];  

    }else{  

        NSLog(@"失败");
    }  

}