How to use props flashmode?

Expo SDK
1

Camera - Expo Documentation. In my BarCodeScanner, there is a button that can turn on/ turn off flash. But after update SDK to 3.3 that flash doesn’t work again.
How to solve it?

2

Hi.

Could you post the code you’re using?

3

export default class BarCodeScreen extends React.Component {
constructor(props) {
super(props);
this.state = {
flash: ‘off’
};
}
render() {
return (

<BarCodeScanner
onBarCodeRead={this._handleBarCodeRead}
torchMode={this.state.flash}
style={[StyleSheet.absoluteFill, styles.container]}
>


<TouchableOpacity
onPress={this._handleFlash}
hitSlop={{ top: 40, bottom: 40, right: 40, left: 40 }}>

Flash

);
}

_handleFlash = () => {
    if (this.state.flash == 'on') {
        this.setState({ flash: 'off' })
    } else {
        this.setState({ flash: 'on' })
    }
}

}

4

Does setting it to ‘torch’ instead of ‘on’ help?

5

no,it doesn’t

6

Hey there, does react-native-torch work in expo? If not, is there a way to just use the flashlight without using the camera?

7

@acvaran I would also like to know

1 Like
8

Unfortunately there isn’t any library that uses the torch function and the way I have solved this problem was to use the expo-camera library. I am rendering the rest of the component inside of the Camera such as:
<Camera…><View style…/View>…/Camera>

And on the props of the Camera I am assigning the flashMode to a variable in the state so whenever I use setState it renders the Camera and opens the torch.

9

Hello, did you manage to make it work?
I really need the flashlight

10

is there any news…

12

expo-camera supports flash mode try it out

13

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