react-native-screenshot-prevent

This fork contains fully working blank screenshot on IOS13+ including screen recording

App layout is white / or black in dark theme

For now you might disable RNPreventScreenshot.enableSecureView() in development mode (check DEV variable)

because disableSecureView() is not working yet correctly

Getting started

$ npm install react-native-screenshot-prevent --save

Mostly automatic installation

React-Native version 0.59.X and higher: on IOS you might use only pod install in your ios folder

$ react-native link react-native-screenshot-prevent

Manual installation

iOS

1. In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
2. Go to node_modules ➜ react-native-screenshot-prevent and add RNScreenshotPrevent.xcodeproj
3. In XCode, in the project navigator, select your project. Add libRNScreenshotPrevent.a to your project's Build Phases ➜ Link Binary With Libraries
4. Run your project (Cmd+R)<

Android

1. Open up android/app/src/main/java/[...]/MainActivity.java

• Add import com.killserver.screenshotprev.RNPreventScreenshotPackage; to the imports at the top of the file
• Add new RNPreventScreenshotPackage() to the list returned by the getPackages() method

2. Append the following lines to android/settings.gradle:

   include ':react-native-screenshot-prevent'
   project(':react-native-screenshot-prevent').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-screenshot-prevent/android')
   
3. Insert the following lines inside the dependencies block in android/app/build.gradle:

     compile project(':react-native-screenshot-prevent')
   

Usage

// sample code

import RNScreenshotPrevent, { addListener } from 'react-native-screenshot-prevent';

/* (IOS, Android) for android might be the only step to get secureView
 * on IOS enables blurry view when app goes into inactive state
 */
RNPreventScreenshot.enabled(true/false);

/* (IOS) enableSecureView for IOS13+ 
 * creates a hidden secureTextField which prevents Application UI capture on screenshots
 */
if(!__DEV__) RNPreventScreenshot.enableSecureView();

/* (IOS) disableSecureView for IOS13+ 
 * remove a hidden secureTextField which prevents Application UI capture on screenshots
 */
if(!__DEV__) RNPreventScreenshot.disableSecureView();

/* (IOS) notification handler
 * notifies when user has taken screenshot (yes, after taking) - you can show alert or do some actions
 *
 * @param {function} callback fn
 * @returns object with .remove() method
 */
addListener(fn);

/** example using the listener */
useEffect(() => {
	const subscription = RNPreventScreenshot.addListener(() => {
		console.log('Screenshot taken');
		showAlert({
			title: 'Warning',
			message: 'You have taken a screenshot of the app. This is prohibited due to security reasons.',
			confirmText: 'I understand'
		});
	})

	return () => {
		subscription.remove();
	}
}, []);