Automatic OTP verification in iOS?

Question

Is there any way to access data from iPhone inbox(SMS) to ios application to do automatic OTP verification like the one in Android? I shall be grateful for your help.

Answer 1

I've got sollution from answer of santosh kumar and Ted

var otpText = String()

• in viewDidload()

     if #available(iOS 12.0, *) {
         txtFirst.textContentType = .oneTimeCode
         txtSecond.textContentType = .oneTimeCode
         txtThird.textContentType = .oneTimeCode
         txtForth.textContentType = .oneTimeCode
         txtFifth.textContentType = .oneTimeCode
     }

     txtFirst.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: .editingChanged)
     txtSecond.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: .editingChanged)
     txtThird.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: .editingChanged)
     txtForth.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: .editingChanged)
     txtFifth.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: .editingChanged)
     txtFirst.becomeFirstResponder() //by doing this it will open the keyboard on first text field automatically

• Action for TextField

   //When changed value in textField
    @objc func textFieldDidChange(textField: UITextField){
        let text = textField.text
        if  text?.count == 1 {
            switch textField{

            case txtFirst:
                txtSecond.becomeFirstResponder()
            case txtSecond:
                txtThird.becomeFirstResponder()
            case txtThird:
                txtForth.becomeFirstResponder()
            case txtForth:
                txtFifth.becomeFirstResponder()
            case txtFifth:
                txtFifth.resignFirstResponder()
                self.dismissKeyboard()
            default:
                break
            }
        }
        if  text?.count == 0 {
            switch textField{
            case txtFirst:
                txtFirst.becomeFirstResponder()
            case txtSecond:
                txtFirst.becomeFirstResponder()
            case txtThird:
                txtSecond.becomeFirstResponder()
            case txtForth:
                txtThird.becomeFirstResponder()
            case txtFifth:
                txtForth.becomeFirstResponder()
            default:
                break
            }
        }
        else{

        }
    }

• OTP String and Dismiss KeyBoard

 func dismissKeyboard(){

        self.otpText = "\(self.txtFirst.text ?? "")\(self.txtSecond.text ?? "")\(self.txtThird.text ?? "")\(self.txtForth.text ?? "")\(self.txtFifth.text ?? "")"

        print(self.otpText)
        self.view.endEditing(true)

    }

Most important thing: if you are using shouldChangeCharactersIn method, please comment it. Else this code will not work

Answer 2

To support Autofill OTP Note : To read OTP from Messages, Message should contain code or passcode

if #available(iOS 12.0, *) {
            optTextField.textContentType = .oneTimeCode
        } else {
            // Fallback on earlier versions
            print("Fallback on earlier versions")
        }

Answer 3

You can get OTP from your message.

otptextField.textContentType = .oneTimeCode

Can please get the project from his link.

https://github.com/karthickkck315/Automatic-OTP

Answer 4

you can easily set this in Storyboard

Answer 5

Also...on the phone "Autofill Passwords" needs to be turned on.

Answer 6

It is also important that the text message you receive contains something with "code" like

"your passcode is:123456"

or

"12345 is your code to log in"

something along that line.

NOT!

Your App: 12345

you can verify if the code in your text message will work with the .oneTimeCode type by tapping the underlined code in your message. If a dialog pops up that says "copy code", you are good to go. Otherwise you might need to change the text of your message.