邮件API - MFMailComposeViewController

MFMailComposeViewController

系统提供的类
使用系统邮件来实现发送邮件

企业微信截图_9a41540d-fdd0-43ec-9920-00b212f08d35.png

项目中先导入MessageUI.framework
先判断是否能发送邮件

if !MFMailComposeViewController.canSendMail() {
  //不支持发送邮件
  }
  else {
   //支持发送邮件
  }

调起系统发送邮件界面

 let mail = MFMailComposeViewController()
 mail.navigationBar.tintColor = UIColor.blue //导航颜色
 mail.setToRecipients(["123456789@qq.com"]) //设置收件地址
 mail.setCcRecipients(["123456789@qq.com"]) //添加抄送
 mail.setBccRecipients(["123456789@qq.com"]) //秘密抄送
 mail.mailComposeDelegate = self //代理

 mail.setSubject("邮件标题")
 //发送文字
 mail.setMessageBody("文字内容", isHTML: false) //邮件主体内容
 //发送图片
 let imageData: NSData = UIImagePNGRepresentation(UIImage(named: "图片名字")!)! as NSData
 mail.addAttachmentData(imageData as Data, mimeType: "", fileName: "图片名字.png")

 present(mail, animated: true, completion: nil)

代理方法
1- 遵循： MFMailComposeViewControllerDelegate
2- 设置代理： mail.mailComposeDelegate = self

func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {
        if result == MFMailComposeResult.sent {
            //发送成功
        }
        else if result == MFMailComposeResult.cancelled {
            //取消发送
        }
        else if result == MFMailComposeResult.failed {
            //发送失败
        }
        else {
            //已保存
        }
        dismiss(animated: true, completion: nil)
    }