This demo is of iOS based OTP Authentication, used to verify your mobile number with OTP (One Time Password).

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Version - iOS 13.x or later

We have tested our program in above versions, however you can use it in other versions as well

• Select country with flag & country code
• Verify mobile number with OTP all over the world

Download this sample project and import swift utility resource files in your project.

Process setup is described below to integrate in sample project.

Configure your required property of countriesPickerVcObj Also set delegate and implement method for call back selected country details e.g.

extension ViewController: CountriesViewControllerDelegate {   
func countriesViewController(_ countriesViewController: CountriesViewController, didSelectCountry country: Country) {
    //Return last selected country details
    }}

var selectedCountry:CountryModel?

• Setup pinview and config validation you want to setup below field config

1. Create PinView Outlet of StackView
2. Access config form Pinview outlet properties setup below validation base on your requirement

    var config:PinConfig!     = PinConfig()
    // Length of OTP
    config.otpLength          = .six
    // Secure text mask color
    config.dotColor           = .black
    config.lineColor          = #colorLiteral(red: 0.8265652657, green: 0.8502194881, blue: 0.9000532627, alpha: 1)
    //Space beetween two text field
    config.spacing            = 30
    //set secure text
    config.isSecureTextEntry  = true
    //show place hodder
    config.showPlaceHolder    = true

like Enter only specify values in textfield

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    ///- For Phone number validation
    if textField == txtPhoneNumberField {
        let aSet = NSCharacterSet(charactersIn:"0123456789").inverted
        let compSepByCharInSet = string.components(separatedBy: aSet)
        let numberFiltered = compSepByCharInSet.joined(separator: "")
        return string == numberFiltered
    }
    else{
        return true
    }
}

- setUpOTPView: this method provide setup of OTP text field like below

validate number with server use of below method

• enter OTP

• callback response

  self.countriesPickerVcObj.verifyOTP(otpCode: "123456", onSuccess:(authDataResult,bool) , onFailure:(error,isError)
  

• enter country code

• enter phone numner

• call back validate details information

  self.countriesPickerVcObj.validateContryAndPhoneNumber(contryCode: "+1", phoneNumber: "9XXXXXXXXX", isValidDetails:(isValid,strMsg)
  

• Param
  • number
• callBack
  • return validationId & error details this method validate phone number and send OTP

Param

• enter OTP callback
• AuthDataResult object & error details

Param

• view: for show indicator
• phoneNowithCountryCode : for Example "+919XXXXXXXX" sucesss
• return isSendSucessOTP status of send otp or not
• return errorMessage show error call this method after check text field details

Param

• otpCoed OnSuccess
• AuthDataResult : get user data
• isVarifyOTP : check otp verify or not onFailure
• error : display error
• isVarifyOTP : check otp verify or not

Create Project setup in firebase console using below URL https://console.firebase.google.com/ 
Please Enable Phone Number sign-in for your Firebase project in console
https://firebase.google.com/docs/auth/ios/phone-auth

Download GoogleService-Info.Plist file and add into project install firebase pod and run project

The OTPAuthentication demo use in you app then same option as the <OTPAuthentication> install firebase pod

• pod 'Firebase/Analytics'
• pod 'Firebase/Auth'

show country picker use of below method help of CountriesViewController class object

• CountriesViewController.show(countriesViewController: self.countriesPickerVcObj, toVar: self)

• select country and Phone number

• Press send button to validate entered details and send OTP help of below mehods

  FirebaseAuthenticate.firSharedInstance.sendOtpAfterValidatePhonenumber
  

• Verify OTP with below method

  FirebaseAuthenticate.firSharedInstance.verifyOTP
  

• Created something awesome, made this code better, added some functionality, or whatever (this is the hardest part).
• Fork it.
• Create new branch to contribute your changes.
• Commit all your changes to your branch.
• Submit a pull request.

We also provide a free, basic support for all users who want to use this OTP verification demo in project. In case you want to customize this OTP demo input to suit your development needs, then feel free to contact our iOS developers.

We have built many other components and free resources for software development in various programming languages. Kindly click here to view our Free Resources for Software Development.

Detailed changes for each release are documented in CHANGELOG.md.

MIT

OTP, Firebase Authentication, One Time Password, OTP For iOS, OTP Authentication, Mobile Number Verficiation, OTP Verification, Firebase OTP Authentication, weblineindia