How to use react-native-camera - 10 common examples

_record() {
        this.camera.capture({
            mode: Camera.constants.CaptureMode.video,
            audio: true
        }).then((data) => {
            if (this.props.setID) {
                this.props.saveVideo(this.props.setID, data.path, this.props.videoType);
            }
            // TODO: share options can be here, but for now just finish
        }).catch((err) => {
            console.tron.log("ERROR " + err);
            this.props.saveVideoError(this.props.setID, err);
            Alert.alert('There was an issue saving your video. Please try again');
        });
    }

constructor(props) {
    super(props);

    this.updateIsAuthorized = this.updateIsAuthorized.bind(this);

    let isAuthorized = true;
    if (Platform.OS === 'ios') {
      // Asks for permissions if not defined, returns choice otherwise
      isAuthorized = undefined;
      Camera.checkDeviceAuthorizationStatus().then(this.updateIsAuthorized);
    }

    this.state = { isAuthorized };

    this.onQRCodeScanned = _.debounce(props.onQRCodeScanned, 1000, { leading: true, trailing: false });
  }

return (
        
      )
    }

		// for ios
    return (
      
        
    )
  }

async _requestCameraPermission() {
    try {
      const permissionGranted = await Camera.checkVideoAuthorizationStatus()
      this.setState({permissionGranted})
    } catch (err) {
      console.warn("Can't get camera permissions", err)
      this.setState({permissionGranted: false})
    }
  }

componentDidMount() {
    Camera.checkVideoAuthorizationStatus().then(data => {
      console.log(data);
      this.setState({ allowed: data });
    });
  }

takePicture = async function () {
        if (Host.isIOS) {
            if (!await Camera.checkDeviceAuthorizationStatus()) {
                alert('相机权限未开启')
                return
            }
        }

        if (Host.isAndroid) {
            if (!await PermissionsAndroid.check(PermissionsAndroid.PERMISSIONS.CAMERA)) {
                alert('相机权限未开启')
                return
            } else {
                console.log('相机权限已开启');
            }
        }
        if (this.camera) {
            const options = { quality: 0.5, base64: true };
            const data = await this.camera.takePictureAsync(options);

renderCameraModal = () => (
    
      
        
           {
              this.camera = camera;
            }}
            style={{ flex: 1 }}
            type={RNCamera.Constants.Type.back}
            autoFocus={RNCamera.Constants.AutoFocus.on}
            flashMode={RNCamera.Constants.FlashMode.off}
            permissionDialogTitle={"Permission to use camera"}
            permissionDialogMessage={
              "We need your permission to use your camera phone"
            }
          />
          
            
          
        
        { this.renderImagesList() }
        
          
            Cancelar

renderCamera() {
    const { scanning } = this.state;
    return (
       {
          if (!scanning) this.handleOnBarCodeRead(data);
        }}
      />
    );
  }

_clickTakePicture = async () => {
        if (this.camera) {
            const item = await this.camera.takePictureAsync({
                mirrorImage: this.state.sideType === RNCamera.Constants.Type.front,
                fixOrientation: true,
                forceUpOrientation: true,
                ...this.props.pictureOptions
            });
            if (Platform.OS === 'ios') {
                if (item.uri.startsWith('file://')) {
                    item.uri = item.uri.substring(7);
                }
            }
            if (this.props.maxSize > 1) {
                if (this.state.data.length >= this.props.maxSize) {
                    Alert.alert('', this.props.maxSizeTakeAlert(this.props.maxSize));
                } else {
                    this.setState({
                        data: [...this.state.data, item],
                    });

switchFlash = () => {
        let newFlashMode;
        const {auto, on, off} = RNCamera.Constants.FlashMode;

        if (this.state.camera.flashMode === auto) {
            newFlashMode = on;
        } else if (this.state.camera.flashMode === on) {
            newFlashMode = off;
        } else if (this.state.camera.flashMode === off) {
            newFlashMode = auto;
        }

        this.setState({
            camera: {
                ...this.state.camera,
                flashMode: newFlashMode,
            },
        });
    };