Utilizing React Native Camera Kit allows for the seamless and continuous scanning of QR codes, offering multiple callbacks when a code is

Attempting to integrate a QR code scanner into my project using react native. Utilizing the plugin react-native-camera-kit, which supports both QR and Bar code scanning. However, I am facing an issue where the scanner continuously scans the code and triggers the function onReadCode={()=>}) repeatedly. Is there a way to scan the QR code only once?

<Camera
 showFrame={true}
 laserColor={Colors.green}
 frameColor="white"
 onReadCode={(event: any) => {
 console.log("event=>", event?.nativeEvent.codeStringValue)
 }}
 scanBarcode={true}
 style={{flex: 1}}
 />

Answer №1

To enhance the scanning functionality, you can implement a state that updates once the code is scanned. This state can be used to alter the prop value `scanBarcode` or replace the `` component with another element displaying the content of the scanned code.

For instance, in Example 1, the barcode scanning stops after detection until the state is set back to true:

const [doScanBarcode, setDoScanBarcode] = useState(true);//initialize state
.
.
.
<Camera
 showFrame={true}
 laserColor={Colors.green}
 frameColor="white"
 onReadCode={(event: any) => {
   setDoScanBarcode(false);//update state here
   console.log("Event:", event?.nativeEvent.codeStringValue)
 }}
 scanBarcode={doScanBarcode}//utilize state here
 style={{flex: 1}}
/>

In Example 2, the rendering changes based on whether the code has been scanned. Once scanned, the camera closes and displays a message confirming the scan:

const [renderScanner, setRenderScanner] = useState(true);//establish state
.
.
.
<>
 {
  renderScanner ?
   <Camera
     showFrame={true}
     laserColor={Colors.green}
     frameColor="white"
     onReadCode={(event: any) => {
       setRenderScanner(false);//update state here
       console.log("Event:", event?.nativeEvent.codeStringValue)
     }}
     scanBarcode={true}
     style={{flex: 1}}
  /> :
  <Text>The code has been scanned.</Text>
 }
</>

Remember to format it accordingly and import the required dependencies for seamless integration.

May your coding endeavors be successful!

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