iOS MailCore2 基本应用

MailCore2是一个第三方的邮件SDK，支持POP和IMAP 方式接收邮件，以及smtp邮件发送

本篇应用：使用SMTP实现发送邮件的功能，以qq邮箱为例。

一，首先需要进入qq邮箱--设置--账户里开启SMTP服务

image.png

二，代码实现

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIButton *sendMailButton = [[UIButton alloc] initWithFrame:CGRectMake(30, 100, 150, 50)];
    sendMailButton.backgroundColor = [UIColor blueColor];
    [sendMailButton setTitle:@"send email" forState:UIControlStateNormal];
    [sendMailButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [sendMailButton addTarget:self action:@selector(sendEmail:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:sendMailButton];
    
}

- (void)sendEmail:(UIButton *)button {
    
    //1,创建MCOSMTPSession，配置好各个连接smtp邮箱的参数
    MCOSMTPSession *smtpSession = [[MCOSMTPSession alloc] init];
    smtpSession.username = @"xxxxxx";
    smtpSession.password = @"授权码"; //是授权码，不是登录密码，
    smtpSession.hostname = @"smtp.qq.com"; //SMTP服务器域名
    smtpSession.port = 587; //端口
    smtpSession.connectionType = MCOConnectionTypeStartTLS; 
    smtpSession.authType = MCOAuthTypeSASLPlain;
    smtpSession.connectionLogger = ^(void *connectionID, MCOConnectionLogType type, NSData *data) {
        if (data) {
            NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
            NSLog(@"str:%@",str);
        }
    };
    
    //2, 使用MCOMessageBuilder构建邮件体的发送内容
    MCOMessageBuilder *builder = [[MCOMessageBuilder alloc] init];
    //邮件头
    [[builder header] setFrom:[MCOAddress addressWithDisplayName:@"just test" mailbox:@"[email protected]"]];
    //设置邮件的接收人
    NSString *toAddress = @"[email protected]";
    MCOAddress *newAddress = [MCOAddress addressWithMailbox:toAddress];
    [[builder header] setTo:@[newAddress]];
   
    //设置邮件标题
    [[builder header] setSubject:@"这是一封测试邮件，请忽略哈~"];
    //设置邮件正文
    [builder setTextBody:@"好久未联系，是否安好？"];
    
    //3，将构建好的邮件发送出去
    NSData *rfc822Data = [builder data];
    MCOSMTPSendOperation *sendOperation = [smtpSession sendOperationWithData:rfc822Data];
    [sendOperation start:^(NSError * _Nullable error) {
        if (error) {
            NSLog(@"邮件发送失败---%@",error);
        } else {
            UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"tips" message:@"邮件发送成功" preferredStyle:UIAlertControllerStyleAlert];
            UIAlertAction *alertAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
                
            }];
            [alert addAction:alertAction];
            
            [self presentViewController:alert animated:YES completion:nil];
        }
    }];
    
}

三，打开qq邮箱，在"已发送"列表里就能找到代码实现发送功能的邮件

image.png

注意：
1，不同邮箱其STMP服务器的hostName和port是不一样的，可自行百度查找，qq邮箱的如下

image.png

2，网上查找的很多例子里配置smtp的连接方式都是如下这种
smtpSession.connectionType = MCOConnectionTypeTLS;运行时总是报错:A stable connection to the server could not be established,发送失败。

将其改为 smtpSession.connectionType = MCOConnectionTypeStartTLS 就ok了。
原因我也不清楚，有大神知道的话烦请告之，在此谢过。