无法使用 SwiftMailGun 从 UITextField 发送文本

Cant send text from UITextField using SwiftMailGun

我正在尝试从 UITextField 向电子邮件发送一些文本,但它什么也没发送,但是当我使用 textView 时一切正常。这是部分代码:

@IBAction func sendButton(sender: UIButton) {

    let mailgun = MailgunAPI(apiKey: "key-*************",
                             clientDomain: "*********.mailgun.org")

    mailgun.sendEmail(to: "**********@gmail.com", from: self.tema.text!, subject: self.message.text!, bodyHTML: "<b>test<b>") { mailgunResult in

        if mailgunResult.success{
            print("Email was sent")
            print(self.tema.text!)
            print(self.message.text!)
        }

    }
}

控制台输出如下: enter image description here

糟糕!那是我的失败!

 @IBAction func sendButton(sender: UIButton) {

    let mailgun = MailgunAPI(apiKey: "key-***************",
                             clientDomain: "sandbox***************.mailgun.org")


    mailgun.sendEmail(to: "mdmabook@gmail.com", from: "Test User <test@test.com>", subject: message.text!, bodyHTML: tema.text!) { mailgunResult in

        if mailgunResult.success{
            print("Email was sent")
            print(self.tema.text!)
            print(self.message.text!)
        }

    }

}