调用iOS自带邮件

需要导入<MessageUI/MessageUI.h>框架

/* 发送邮件 */
- (IBAction)email:(id)sender {
    
    if (NO == [MFMailComposeViewController canSendMail]) {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"友情提示" message:@"您还未配置邮箱账户，是否现在跳转配置？" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
        [alert show];
        return;
    }
    
    // 如果没有配置邮箱的话，创建出来的对象为nil,弹出会crash
    MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    
    // 设置picker的委托方法，完成之后会自动调用成功或失败的方法
    picker.mailComposeDelegate = self;
    // 添加主题
    [picker setSubject:@"案件报告"];
    // 添加收件人
    NSArray *toRecipients = [NSArray arrayWithObject:@"404401637@163.com"];
    
    // 添加抄送
    NSArray *ccRecipients = [NSArray arrayWithObjects:@"second@qq.com",@"third@qq.com", nil];
    // 添加密送
    NSArray *bccRecipients = [NSArray arrayWithObject:@"fourth@qq.com"];
    
    [picker setToRecipients:toRecipients];
    [picker setCcRecipients:ccRecipients];
    [picker setBccRecipients:bccRecipients];
    
    // 拼接邮件body默认显示的信息
    NSString *emailBody = [NSString stringWithFormat:@"分享自：腾讯扣扣.诉讼报告.app\n<img src='http://static.588ku.com/imgPath/public/images/ku-logoNewV1.png' /><p>我转载的图片</p>"];
    [picker setMessageBody:emailBody isHTML:YES];
    
    // 添加word文档附件
    NSString *path = [[NSBundle mainBundle] pathForResource:@"诉讼报告-2018.docx" ofType:nil];
    NSData *docData = [NSData dataWithContentsOfFile:path];
    [picker addAttachmentData:docData mimeType:@"application/msword" fileName:@"诉讼报告-2018.docx"];
    
    // 添加图片附件
    NSData *myData = UIImageJPEGRepresentation([UIImage imageNamed:@"header_cry_icon"], 1.0);
    [picker addAttachmentData:myData mimeType:@"image/jpeg" fileName:@"new.png"];
    
    
    [self presentViewController:picker animated:YES completion:nil];
    
}

- (void)mailComposeController:(MFMailComposeViewController*)controller
          didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
    switch (result)
    {
        case MFMailComposeResultCancelled:
            NSLog(@"邮件发送取消");  // 邮件发送取消
            break;
        case MFMailComposeResultSaved:
            NSLog(@"邮件保存成功");  // 邮件保存成功
            break;
        case MFMailComposeResultSent:
            NSLog(@"邮件发送成功");  // 邮件发送成功
            break;
        case MFMailComposeResultFailed:
            NSLog(@"邮件发送失败");  // 邮件发送失败
            break;
        default:
            NSLog(@"邮件未发送");
            break;
    }
    
    [controller dismissViewControllerAnimated:YES completion:nil];
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 1) {
        // 跳到邮箱去
        NSURL *url = [NSURL URLWithString:@"mailto://"];
        if ([[UIApplication sharedApplication] canOpenURL:url]) {
            [[UIApplication sharedApplication] openURL:url];
        }
    }
}

• 其他附件配置

    /* 发送图片附件 */
    NSString *path = [[NSBundle mainBundle] pathForResource:@"rainy" ofType:@"jpg"];
    NSData *myData = [NSData dataWithContentsOfFile:path];
    [picker addAttachmentData:myData mimeType:@"image/jpeg" fileName:@"rainy.jpg"];
    
    /* 发送txt文本附件 */
    NSString *path = [[NSBundle mainBundle] pathForResource:@"MyText" ofType:@"txt"];
    NSData *myData = [NSData dataWithContentsOfFile:path];
    [picker addAttachmentData:myData mimeType:@"text/txt" fileName:@"MyText.txt"];
    
    /* 发送doc文本附件 */
    NSString *path = [[NSBundle mainBundle] pathForResource:@"MyText" ofType:@"doc"];
    NSData *myData = [NSData dataWithContentsOfFile:path];
    [picker addAttachmentData:myData mimeType:@"text/doc" fileName:@"MyText.doc"];
    
     /* 发送pdf文档附件 */
     NSString *path = [[NSBundlemainBundle]pathForResource:@"CodeSigningGuide"ofType:@"pdf"];
     NSData *myData = [NSDatadataWithContentsOfFile:path];
     [pickeraddAttachmentData:myDatamimeType:@"file/pdf"fileName:@"rainy.pdf"];

==配置iOS自带邮件账号注意==

• 如果没有配置邮箱账号直接跳到邮箱会崩溃，所以要处理下
• 账号里面的IMAP、SMTP的密码，不是指邮箱的密码，是第三方邮箱配置授权码，需要到对应的邮箱管理置平台去获取
• 跳转系统邮箱前可以配置一些收件人、抄送人等信息，但是要确保所有收件人的邮箱地址可用，不然会导致这封邮件发不出去，所有人都收不到，这个跟网页上操作不一样，网页上是会全发出去，没收到就没收到