解析注册在Swift 3中无法正常工作

Question

我在Heroku和MongoDB上部署了一个解析服务器应用程序。在我的Swift 3应用程序中，我设置了一个名为register的按钮，它运行注册功能：

@IBAction func SignUpBtn(_ sender: UIButton) {
    let user = PFUser()
    user.username = usernameTextField.text
    user.password = passwordTextField.text
    user.email = emailTextField.text
    user["nameandsurname"] = nameandsurnameTextField.text
    user.signUpInBackground {
        (succeeded: Bool, error: Error?) -> Void in

        if error != nil {
            print("error")
            self.errorLabel.text = "Please make sure the email has not already been used or try changing the username"
        } else {
            self.performSegue(withIdentifier: "signuptohome", sender: self)
        }
    }

当我按下按钮时，即使字段为空白，该按钮也会重定向到主页，让用户使用该应用程序。我该怎么办呢？

Answer 1

我的逻辑如下有效。另外，请确保您没有Segues进入storyboard，而是忘记了{<1}}。

//this checks 3 fields that they are filled and not empty
     if  passwordTextField.text == "" || emailTxt.text == "" || usernameTextField.text == ""{
            simpleAlert(mess: "You must fill all fields to sign up")
            self.hideHUD()


    } else {
        let user = PFUser()
        user.username = usernameTextField.text
        user.password = passwordTextField.text
        user.email = emailTextField.text

        user.signUpInBackground { (succeeded, error) -> Void in
            if error == nil {
                //success register not lets log him in!!
                PFUser.logInWithUsername(inBackground: self.usernameTextField.text!, password:self.passwordTextField.text!) { (user, error) -> Void in
                    if error == nil {
                      // Here you can go to your logged in or dashboard page!!
                        self.hideHUD()

                    } else {
                        //failed to log user in
                        self.simpleAlert(mess: "\(error!.localizedDescription)")
                        self.hideHUD()
                    }}
            // ERROR
            } else {
                //This will be the failed to register user
                self.simpleAlert(mess: "\(error!.localizedDescription)")
                self.hideHUD()
        }}
}