CODEWITHSUNDEEP
iosswiftuitextfield
Nicholas Agger Lui
Nicholas Agger Lui

Reputation: 729

swift get nil value in alertview textfield

I use SCLAlertView Framework as my Alert View. https://github.com/vikmeup/SCLAlertView-Swift

I create an alertview with textfield. Here is the code.

let emailSubmit: UITextField = UITextField()
let passwordSubmit: UITextField = UITextField()
var email: String?
var password: String?

//This function call when loginbutton tapped
func showLogin(){

    let alertView = SCLAlertView()

    let emailSubmit = alertView.addTextField("Enter your Email")
    let passwordSubmit = alertView.addTextField("Password")

    email = emailSubmit.text
    password = passwordSubmit.text
    passwordSubmit.secureTextEntry = true

    alertView.addButton("Confirm", target:self, selector:#selector(ViewController.submitLogin))

    alertView.showTitle(
      "Login",
      subTitle: "",
      duration: nil,
      completeText: "Cancel",
      style: .Info)
  }

It required me to add a function for the button. The function name is submitLogin. It use to send the login detail(textfield.text) to the back-end server. However, it only return nil value after i click the submit button It is the submit login button function

func submitLogin(){
let email = emailSubmit.text!
let password = passwordSubmit.text!

print("\(email),\(password)")
}

However, It display nil when I click the submit button Can anyone point out what's wrong with the code?

Upvotes: 0

Views: 410

Answers (2)

Bista
Bista

Reputation: 7903

The Code should be like this:

var email: String?
var password: String?

//This function call when loginbutton tapped
@IBAction func showLogin(){

    let alertView = SCLAlertView()

    let emailSubmit = alertView.addTextField("Enter your Email")
    let passwordSubmit = alertView.addTextField("Password")

    passwordSubmit.secureTextEntry = true

    alertView.addButton("Confirm") {
        self.email = emailSubmit.text
        self.password = passwordSubmit.text

        self.submitLogin()
    }

    alertView.showTitle(
        "Login",
        subTitle: "",
        duration: nil,
        completeText: "Cancel",
        style: .Info)
}

func submitLogin(){
    print("\(email),\(password)")
}

Explanation:

In your code the line password = passwordSubmit.text is setting value of var password to nil before user presses the confirm button, same with var email.

And there is not need to Define email and password textfields, since alertview will create textfields within itself.

Upvotes: 1

felix
felix

Reputation: 11552

I think there are two different emailSubmit and passwordSubmit variables present in your code. The one outside the function showLogin is the one you are using in submitLogin method but those fields are initialized without any value on lines 1 and 2. There is an another instance initialized and added to the SCLAlertView inside the showLogin method and displayed but its value is not used otherwise.

You should probably use blocks like how it is suggested in the sample code

Upvotes: 2

Related Questions