expo take photo

expo-take-photo.ts

import { StatusBar } from 'expo-status-bar';
import React, { useState, useEffect, useRef } from 'react';
import { Platform, StyleSheet, TouchableOpacity } from 'react-native';
import { Camera } from 'expo-camera';

import { Text, View } from '../components/Themed';
import { FontAwesome5 } from '@expo/vector-icons';

export default function ModalScreen() {
  const [hasPermission, setHasPermission] = useState(false);
  const [type, setType] = useState(Camera.Constants.Type.back);
  const cam = useRef<Camera | null>(null)

  useEffect(() => {
    (async () => {
      const { status } = await Camera.requestPermissionsAsync();
      setHasPermission(status === 'granted');
    })();
  }, []);

  if (hasPermission === null) {
    return <View />;
  }
  
  if (hasPermission === false) {
    return <Text>No access to camera</Text>;
  }

  const _takePhoto = async () => {
    if (cam.current) {
      const photo = await cam.current.takePictureAsync()
        .then(() => {
          console.debug(photo)
        })
    } else {
      console.log('asdfas')
    }
  }

  return (
    <View style={styles.container}>
      <Text style={styles.title}>Modal</Text>
      <View style={styles.separator} lightColor="#eee" darkColor="rgba(255,255,255,0.1)" />
      <Camera style={styles.camera} type={type} ref={cam}>
        <View style={styles.buttonContainer}>
          <TouchableOpacity
            style={styles.button}
            onPress={() => {
              setType(
                type === Camera.Constants.Type.back
                  ? Camera.Constants.Type.front
                  : Camera.Constants.Type.back
              );
            }}>
            <FontAwesome5
              name="flipboard"
              size={25}
              color="white"
              style={{ marginRight: 15 }}
            />
          </TouchableOpacity>
          <TouchableOpacity
            style={styles.button}
            onPress={_takePhoto}>
            <FontAwesome5
              name="camera"
              size={25}
              color="white"
              style={{ marginRight: 15 }}
            />
          </TouchableOpacity>
        </View>
      </Camera>

      {/* Use a light status bar on iOS to account for the black space above the modal */}
      <StatusBar style={Platform.OS === 'ios' ? 'light' : 'auto'} />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1
  },
  title: {
    fontSize: 20,
    fontWeight: 'bold',
  },
  separator: {
    marginVertical: 30,
    height: 1,
    width: '80%',
  },
  camera: {
    flex: 1,
  },
  buttonContainer: {
    flex: 1,
    backgroundColor: 'transparent',
    flexDirection: 'row',
    margin: 20,
  },
  button: {
    flex: 0.1,
    alignSelf: 'flex-end',
    alignItems: 'center',
  },
  text: {
    fontSize: 18,
    color: 'white',
  },
});