React Native Implement Custom reCaptcha in Android iOS Example

Captcha is a type of unpredictable challenge text code written in alphanumeric characters used to make difference between Virus(SPAM) and real humans. Captcha can only be readable by human eyes and only humans can answer the right captcha. It’ll stop spam attacks on Log-In, Sing-Up and Comment pages in web applications. Right now the Captcha is also used in mobile applications to make them secure against SPAM bots. So in this tutorial we would Implement Custom reCaptcha in Android iOS React Native Application Example Tutorial.

Contents in this project Implement Custom reCaptcha in React Native Android iOS App Example Tutorial:

1. Import StyleSheet, Text, View, TouchableOpacity, TextInput, Image and Alert components in your project’s App.js file.

2. Create constructor() function in your app’s main export default class and inside the constructor() we would make 4 States named as textInput_text_holder, sum_holder, random_number_1 and random_number_2.

  1. textInput_text_holder : Holds the Text Input entered text.
  2. random_number_1 : Holds the generated random number 1.
  3. random_number_2 : Holds the generated random number 2.
  4. sum_holder : Holds the Sum total of both 2 random numbers.

3. Create inbuilt componentDidMount() method in your main class and call the generate_captcha() function which we would create in next step.

4. Create a function named as generate_captcha(). Inside this function we would generate 2 random numbers between 1 to 100. This function is our main function which generates captcha.

5. Create a function named as run_captcha_function(). Inside this function we would match the user entered captcha with auto generated captcha text. In this function you can put your own code which you want to execute on right captcha entered.

6. Creating the Captcha view in render’s return block.

7. Creating style.

8. Complete source code for App.js File :

Screenshots:

React Native Implement Custom reCaptcha in Android iOS Example

2 Comments

  1. can you please give me the code for react native counter of increment and decrement component in single button on click it should increment once again we click it should decrement please

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