Swift：IF语句中的多个条件

Question

我目前正在尝试使用具有多个条件的if语句验证注册页面。

与此同时，我想用正确的电子邮件格式验证电子邮件地址。

下面是每个字段应该基本检查。

@IBAction func createAccountButton(_ sender: Any) { 

    //check if textfields are empty and display alert 
    let providedEmailAddress = emailTextField.text 
    let isEmailAddressValid = isValidEmailAddress(emailAddressString: providedEmailAddress!) 


    if (isEmailAddressValid || (firstNameTextField.text?.isEmpty)! || (lastNameTextField.text?.isEmpty)! || (usernameTextField.text?.isEmpty)! || (phoneNumberTextField.text?.isEmpty)! || (passwordTextField.text?.isEmpty)!) { 
     let alertViewController = SCLAlertView().showInfo("Failed to create account", subTitle: "One or more fields are empty, please check and try again.") 
    } else { 
     SVProgressHUD.show(withStatus: "Creating account...") 
     SVProgressHUD.dismiss(withDelay: 4) 
    } 
} 

变量isEmailAddressValid链接到这个功能我就this site找到。

// Check if email address entered is of the valid format 
    func isValidEmailAddress(emailAddressString: String) -> Bool { 

     var returnValue = true 
     let emailRegEx = "[A-Z0-9a-z.-_][email protected][A-Za-z0-9.-]+\\.[A-Za-z]{2,3}" 

     do { 
      let regex = try NSRegularExpression(pattern: emailRegEx) 
      let nsString = emailAddressString as NSString 
      let results = regex.matches(in: emailAddressString, range: NSRange(location: 0, length: nsString.length)) 

      if results.count == 0 
      { 
       returnValue = false 
      } 

     } catch let error as NSError { 
      print("invalid regex: \(error.localizedDescription)") 
      returnValue = false 
     } 

     return returnValue 
    } 

不过，测试时，我意识到，当我在各个领域，除了emailTextfield.text输入一个值，然后单击创建一个帐户，执行该语句的else一部分。

此外，当所有字段都有值时，我会假设else部分语句将执行，但会显示'未能创建帐户'警报。

我在做什么错，需要改变什么？

Answer 1

你应该

if (!isEmailAddressValid |