this.camera.takePictureAsync().then(obj => {
        const uri = obj.uri;
        const width = obj.width;
        const height = obj.height;
        let picPath = LATEST_IMG
        ImageManipulator.manipulateAsync(uri,
          [{resize: {width: 0.25 * width, height: 0.25 * height}}, {flip: {horizontal: true}}], {base64: true, format: 'jpeg'})
          .then(obj => {
            const uriFlipped = obj.uri;
            const base64 = obj.base64;
            FileSystem.writeAsStringAsync(LATEST_IMG, base64).then(() => console.log('photo saved'))
            this.setState({takingPhoto: false, photo: uriFlipped})
        });
      })
    }