带 react-native 的切换手电筒（世博会）

Question

I am trying to toggle the flaslight from my react-native export app. This Plugin does not work since I am using expo.

The flashMode property of the Expo Camera Component allows me to toggle the flash while taking a photo.

Is there a way to toggle the flashlight in another way?

Answer 1

I ran into this same problem with expo . What I did was expo ejected and then used this library to toggle the flash light ( https://www.npmjs.com/package/react-native-torch ). Then everything worked as it should

Answer 2

This solves the problem of using torch while scanning QRCode/BarCode in React Native (Expo) Project

<Camera 
    flashMode={Camera.Constants.FlashMode.torch}
    barCodeScannerSettings={{
    barCodeTypes:[BarCodeScanner.Constants.BarCodeType.qr]
    }}
    onBarCodeScanned={handleBarCodeScanned}
    />

Preview