react-native-vision-camera/lib/hooks/useObjectOutput.js

VisionCamera is the fastest and most powerful Camera for react-native.

import { useEffect, useMemo } from 'react';
import { VisionCamera } from '../VisionCamera';
/**
 * Use a {@linkcode CameraObjectOutput}.
 *
 * @example
 * ```ts
 * const objectOutput = useObjectOutput({
 *   types: ['qr'],
 *   onObjectsScanned(objects) {
 *     console.log(`Scanned ${objects.length} objects!`)
 *   }
 * })
 * ```
 */
export function useObjectOutput({ types, onObjectsScanned, }) {
    // 1. Create object output
    const objectOutput = useMemo(() => VisionCamera.createObjectOutput({
        enabledObjectTypes: types,
    }), [types]);
    // 2. Update onObjectsScanned() callback if it changed
    useEffect(() => {
        objectOutput.setOnObjectsScannedCallback(onObjectsScanned);
    }, [objectOutput, onObjectsScanned]);
    // 3. Return :)
    return objectOutput;
}