React useState starts bugging after multiple state changes

React useState starts bugging after multiple state changes - javascript

Im working on a cookie clicker type game and Im working on making features like automatic clickers / combo multipliers. I created the start of the game but when I use my auto function it begins bugging after multiple clicks of the clicker. I have linked the code and an example of the bug occurring below.
CODE
import React, { useState, useEffect } from "react";
import { StyleSheet, Text, View, Image } from "react-native";
import { cases } from "./cases";
import { motion } from "framer-motion";
const io = require("socket.io-client");
const SocketEndpoint = "http://localhost:3000/";
const App = () => {
const [cash, setCash] = useState(0);
const [clicks, setClicks] = useState(0);
const [bot, setBot] = useState(0);
const [open, setOpen] = useState(false);
const [prize, setPrize] = useState(null);
const [connected, setConnected] = useState(false);
const [upgrades, setUpgrades] = useState({auto: false, multi: false})
const [multi, setMulti] = useState(1);
let applied = false;
useEffect(() => {[![enter image description here][1]][1]
const socket = io(SocketEndpoint, {
transports: ["websocket"],
});
socket.on("connect", () => {
setConnected(true)
});
}, [])
useEffect(() => {
if(!applied) {
autoUpgrade();
applied = true;
}
}, [bot, upgrades])
const autoUpgrade = () => {
if (!upgrades.auto) {
return;
}
const inter = setInterval(() => setBot(bot + 1), 1000);
return () => clearInterval(inter);
}
const collectBotIncome = () => {
setCash(cash + bot);
setBot(0);
}
const addMulti = () => {
if (!upgrades.multi) {
return;
}
setMulti(2)
}
const increasePoint = () => {
setClicks(clicks + (1 * multi))
}
const purchaseCase = () => {
setClicks(clicks - 10)
}
const purchaseUpgrade = (upgrade) => {
alert('purchased')
upgrade === 'auto' ? setUpgrades({...upgrades, auto: true}) : null;
upgrade === 'multi' ? setUpgrades({...upgrades, multi: true}) : null;
}
const between = (x, min, max) => {
return x >= min && x <= max;
}
const openCase = () => {
setOpen(true);
purchaseCase();
const ticket = Math.floor(Math.random() * 10000);
console.log('[ROUND] Ticket:' + ticket)
var found = false;
var i;
for (i = 0; i < cases.types[0].items.length; i++) {
var item = cases.types[0].items[i];
if(between(ticket, item.ticketStart, item.ticketEnd)) {
setPrize(item.name)
found = true;
}
}
}
return (
<View style={styles.container}>
<View style={styles.shopMenu}>
<Text style={{color: 'white'}}>Shop</Text>
<Text onClick={() => purchaseUpgrade('auto')} style={{color: 'white'}}>Auto Click Level 1</Text>
<Text onClick={() => purchaseUpgrade('multi')} style={{color: 'white'}}>Click Multiplier Level 1</Text>
</View>
<View style={styles.shopMenu}>
<Text style={{color: 'white'}}>Inventory</Text>
{upgrades.auto
?
<>
<Text style={{color: 'white'}}>{bot}</Text>
<Text onClick={collectBotIncome} style={{color: 'white'}}>Collect Bot Income</Text>
</>
: null
}
</View>
<motion.img
whileHover={{ scale: 1.1 }}
whileTap={{ scale: 0.9 }}
onClick={increasePoint}
src={require('./src/assets/case.png')} alt="case"
/>
<Text style={{color: 'white'}}>clicks: {clicks ? clicks : "0"}</Text>
<Text style={{color: 'white'}}>connected: {connected ? "true" : "false"}</Text>
{open
? <Text style={{color: 'white'}}>{prize ? prize : 'Failed to get Prize'}</Text>
: <Image
style={clicks >= 10 ? styles.available : styles.unavailable}
source={require('./src/assets/case.png')} alt="case"
onClick={openCase}
/>
}
<Text style={{color: 'white'}}>{cases.types[0].name}</Text>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: "black",
alignItems: "center",
justifyContent: "center",
},
available: {
display: 'flex',
width: 150,
height: 100,
filter: 'none',
transition: '200ms ease',
marginTop: 50
},
unavailable: {
display: "flex",
width: 150,
height: 100,
filter: 'grayscale(1)',
transition: '200ms ease',
marginTop: 50
},
shopMenu: {
display: "flex",
flexDirection: "column"
}
});
export default App;
PREVIEW

Related

Add event to selected day Calendar Agenda

I am currently learning to build an app with react native expo and javascript. I have my calendar displaying but I can't figure out how to add event to day selected. There will be a button that the user press and from this they should be able to add events to that day. This was the guide used to build the agenda https://github.com/wix/react-native-calendars/blob/master/example/src/screens/agendaScreen.tsx
import React, { Component, useState } from "react";
import { Alert, StyleSheet, Text, View, TouchableOpacity } from "react-native";
import {
Agenda,
DateData,
AgendaEntry,
AgendaSchedule,
} from "react-native-calendars";
import { Card } from "react-native-paper";
const timeToString = (time) => {
const date = new Date(time);
return date.toISOString().split("T")[0];
};
const CalendarComponent = () => {
const [entree, setItems] = useState({});
const loadItems = (day) => {
setTimeout(() => {
for (let i = -15; i < 85; i++) {
const time = day.timestamp + i * 24 * 60 * 60 * 1000;
const strTime = timeToString(time);
if (!entree[strTime]) {
entree[strTime] = [];
}
}
const newItems = {};
Object.keys(entree).forEach((key) => {
newItems[key] = entree[key];
});
setItems(newItems);
}, 1000);
};
const renderEmptyDate = () => {
return (
<View style={styles.emptyDate}>
<Text>This is empty date!</Text>
</View>
);
};
const renderItem = (item) => {
return (
<TouchableOpacity style={styles.item}>
<Card>
<Card.Content>
<View>
<Text>{item.name}</Text>
</View>
</Card.Content>
</Card>
</TouchableOpacity>
);
};
return (
<Agenda
items={entree}
loadItemsForMonth={loadItems}
renderItem={renderItem}
renderEmptyDate={renderEmptyDate}
showClosingKnob={true}
/>
);
};
const styles = StyleSheet.create({
item: {
backgroundColor: "white",
flex: 1,
borderRadius: 5,
padding: 10,
marginRight: 10,
marginTop: 17,
},
emptyDate: {
height: 15,
flex: 1,
paddingTop: 30,
},
});
export default CalendarComponent;

SOLVED Expo-Camera, takePictureAsync undefined (Unhandled promise rejection: TypeError: ref.current.takePictureAsync is not a function)

I'm trying to create react app with expo using expo-camera for taking pictures. I have separately components MeasurementCameraScreen and MeasurementCamera. I'm using useRef() hook to be able to call takePictureAsync() from the MeasuremenCameraScreen.
When pressing the take image -button takePicture() console.logs the ref, so I assume the onPress gets there, but then I get the following error message:
[Unhandled promise rejection: TypeError: ref.current.takePictureAsync is not a function. (In 'ref.current.takePictureAsync(options)', 'ref.current.takePictureAsync' is undefined)]
I saw that people have also had same issues with takePictureAcync(), but I haven't found solution to my problem. I also tired to combine the MeasurementCameraScreen and MeasurementCamera components to one component, and with that I got the camera working, but I'm curious of why it doesn't work now? refs are new thing for me so I think there is something wrong with them.
Here are the components:
MeasurementCameraScreen
import { useRef } from 'react'
import { StyleSheet, TouchableOpacity, View } from 'react-native'
import MeasurementCamera from '../components/MeasurementCamera'
import Text from '../components/Text'
const MeasurementCameraScreen = () => {
const cameraRef = useRef(null)
return (
<View style={styles.container}>
<View style={styles.cameraContainer}>
<MeasurementCamera ref={cameraRef}/>
</View>
<View>
</View>
<TouchableOpacity
onPress={() => cameraRef.current.takePicture()}
style={styles.buttonContainer}
>
<Text>
Take image
</Text>
</TouchableOpacity>
</View>
)
}
const styles = StyleSheet.create({
container: {
flex: 1,
},
cameraContainer: {
flex: 1,
},
buttonContainer: {
width: '100%',
height: 70,
backgroundColor: 'white',
justifyContent: 'center',
alignItems: 'center',
alignSelf: 'flex-end'
},
})
export default MeasurementCameraScreen
MeasurementCamera
import { useState, useEffect, useImperativeHandle, forwardRef } from 'react'
import { StyleSheet } from "react-native"
import { Camera } from 'expo-camera'
import Text from './Text'
const MeasurementCamera = forwardRef((props, ref) => {
const [hasPermission, setHasPermission] = useState(null)
useEffect(() => {
const getPermission = async () => {
const { status } = await Camera.requestCameraPermissionsAsync()
setHasPermission(status === 'granted')
}
getPermission()
}, [])
const takePicture = async () => {
if (ref) {
console.log(ref.current)
const options = {
quality: 1,
base64: true
}
const picture = await ref.current.takePictureAsync(options)
console.log(picture.uri)
}
}
useImperativeHandle(ref, () => ({
takePicture
}))
if (hasPermission === null) {
return <Text>Requesting for camera permission</Text>
} if (hasPermission === false) {
return <Text>No access to camera</Text>
}
return (
<Camera
ref={ref}
style={StyleSheet.absoluteFillObject}
/>
)
})
MeasurementCamera.displayName = 'MeasurementCamera'
export default MeasurementCamera
EDIT: Solved the problem, check out the comment for solution! :)

Okay I found the solution!
After reading the medium article #LouaySleman recommended about the expo-camera I understood that to be able to use the Expo Camera components functions I need to use ref. So what I needed was two refs, one for the components to communicate and another one to be able to use the Camera takePictureAsync() function.
Now that we have permissions to access the Camera, you should get familiar with the ref props on line 132, in the Camera component. There we have passed the cameraRef that was previously defined with useRef. In doing so, we will have access to interesting methods that we can call to control the Camera.

What you needed is to add two refs, one for the components to communicate and another one to be able to use the Camera takePictureAsync() function Please check this example from medium:
import React, { useState, useRef, useEffect } from "react";
import {
View,
Text,
TouchableOpacity,
SafeAreaView,
StyleSheet,
Dimensions,
} from "react-native";
import { Camera } from "expo-camera";
import { Video } from "expo-av";
export default function CameraScreen() {
const [hasPermission, setHasPermission] = useState(null);
const [cameraType, setCameraType] = useState(Camera.Constants.Type.back);
const [isPreview, setIsPreview] = useState(false);
const [isCameraReady, setIsCameraReady] = useState(false);
const [isVideoRecording, setIsVideoRecording] = useState(false);
const [videoSource, setVideoSource] = useState(null);
const cameraRef = useRef();
useEffect(() => {
(async () => {
const { status } = await Camera.requestPermissionsAsync();
setHasPermission(status === "granted");
})();
}, []);
const onCameraReady = () => {
setIsCameraReady(true);
};
const takePicture = async () => {
if (cameraRef.current) {
const options = { quality: 0.5, base64: true, skipProcessing: true };
const data = await cameraRef.current.takePictureAsync(options);
const source = data.uri;
if (source) {
await cameraRef.current.pausePreview();
setIsPreview(true);
console.log("picture", source);
}
}
};
const recordVideo = async () => {
if (cameraRef.current) {
try {
const videoRecordPromise = cameraRef.current.recordAsync();
if (videoRecordPromise) {
setIsVideoRecording(true);
const data = await videoRecordPromise;
const source = data.uri;
if (source) {
setIsPreview(true);
console.log("video source", source);
setVideoSource(source);
}
}
} catch (error) {
console.warn(error);
}
}
};
const stopVideoRecording = () => {
if (cameraRef.current) {
setIsPreview(false);
setIsVideoRecording(false);
cameraRef.current.stopRecording();
}
};
const switchCamera = () => {
if (isPreview) {
return;
}
setCameraType((prevCameraType) =>
prevCameraType === Camera.Constants.Type.back
? Camera.Constants.Type.front
: Camera.Constants.Type.back
);
};
const cancelPreview = async () => {
await cameraRef.current.resumePreview();
setIsPreview(false);
setVideoSource(null);
};
const renderCancelPreviewButton = () => (
<TouchableOpacity onPress={cancelPreview} style={styles.closeButton}>
<View style={[styles.closeCross, { transform: [{ rotate: "45deg" }] }]} />
<View
style={[styles.closeCross, { transform: [{ rotate: "-45deg" }] }]}
/>
</TouchableOpacity>
);
const renderVideoPlayer = () => (
<Video
source={{ uri: videoSource }}
shouldPlay={true}
style={styles.media}
/>
);
const renderVideoRecordIndicator = () => (
<View style={styles.recordIndicatorContainer}>
<View style={styles.recordDot} />
<Text style={styles.recordTitle}>{"Recording..."}</Text>
</View>
);
const renderCaptureControl = () => (
<View style={styles.control}>
<TouchableOpacity disabled={!isCameraReady} onPress={switchCamera}>
<Text style={styles.text}>{"Flip"}</Text>
</TouchableOpacity>
<TouchableOpacity
activeOpacity={0.7}
disabled={!isCameraReady}
onLongPress={recordVideo}
onPressOut={stopVideoRecording}
onPress={takePicture}
style={styles.capture}
/>
</View>
);
if (hasPermission === null) {
return <View />;
}
if (hasPermission === false) {
return <Text style={styles.text}>No access to camera</Text>;
}
return (
<SafeAreaView style={styles.container}>
<Camera
ref={cameraRef}
style={styles.container}
type={cameraType}
flashMode={Camera.Constants.FlashMode.on}
onCameraReady={onCameraReady}
onMountError={(error) => {
console.log("camera error", error);
}}
/>
<View style={styles.container}>
{isVideoRecording && renderVideoRecordIndicator()}
{videoSource && renderVideoPlayer()}
{isPreview && renderCancelPreviewButton()}
{!videoSource && !isPreview && renderCaptureControl()}
</View>
</SafeAreaView>
);
}
const WINDOW_HEIGHT = Dimensions.get("window").height;
const closeButtonSize = Math.floor(WINDOW_HEIGHT * 0.032);
const captureSize = Math.floor(WINDOW_HEIGHT * 0.09);
const styles = StyleSheet.create({
container: {
...StyleSheet.absoluteFillObject,
},
closeButton: {
position: "absolute",
top: 35,
left: 15,
height: closeButtonSize,
width: closeButtonSize,
borderRadius: Math.floor(closeButtonSize / 2),
justifyContent: "center",
alignItems: "center",
backgroundColor: "#c4c5c4",
opacity: 0.7,
zIndex: 2,
},
media: {
...StyleSheet.absoluteFillObject,
},
closeCross: {
width: "68%",
height: 1,
backgroundColor: "black",
},
control: {
position: "absolute",
flexDirection: "row",
bottom: 38,
width: "100%",
alignItems: "center",
justifyContent: "center",
},
capture: {
backgroundColor: "#f5f6f5",
borderRadius: 5,
height: captureSize,
width: captureSize,
borderRadius: Math.floor(captureSize / 2),
marginHorizontal: 31,
},
recordIndicatorContainer: {
flexDirection: "row",
position: "absolute",
top: 25,
alignSelf: "center",
justifyContent: "center",
alignItems: "center",
backgroundColor: "transparent",
opacity: 0.7,
},
recordTitle: {
fontSize: 14,
color: "#ffffff",
textAlign: "center",
},
recordDot: {
borderRadius: 3,
height: 6,
width: 6,
backgroundColor: "#ff0000",
marginHorizontal: 5,
},
text: {
color: "#fff",
},
});

how to make an infinite image carousel with hooks in react native

I am making an infinite image carousel using hooks and javascript in react native.
I am almost done with the code and also the carousel works absolutely fine but the active dots below the carousel runs faster than the images. I have tried a couple of things but unfortunately it didn't worked out.
Thanks in advance.
import React, {
useEffect,
useState,
useRef,
useCallback,
createRef,
} from 'react';
import {
StyleSheet,
View,
Dimensions,
FlatList,
LayoutAnimation,
UIManager,
Text,
} from 'react-native';
import {ActivityIndicator} from 'react-native';
import {Image} from 'react-native-elements';
const HomeCarousel = ({data}) => {
const [dimension, setDimension] = useState(Dimensions.get('window'));
const [index, setIndex] = useState(0);
const [dataState, setDataState] = useState(data);
slider = createRef();
let intervalId = null;
const onChange = () => {
setDimension(Dimensions.get('window'));
};
useEffect(() => {
Dimensions.addEventListener('change', onChange);
return () => {
Dimensions.removeEventListener('change', onChange);
};
});
useEffect(() => {
if (Platform.OS === 'android') {
UIManager.setLayoutAnimationEnabledExperimental(true);
}
}, []);
viewabilityConfig = {
viewAreaCoveragePercentThreshold: 50,
};
const onViewableItemsChanged = ({viewableItems, changed}) => {
if (viewableItems.length > 0) {
let currentIndex = viewableItems[0].index;
if (currentIndex % data.length === data.length - 1) {
setIndex(currentIndex),
setDataState(dataState => [...dataState, ...data]);
} else {
console.log(currentIndex, 'else');
setIndex(currentIndex);
}
}
};
const onSlideChange = () => {
LayoutAnimation.configureNext(LayoutAnimation.Presets.easeIn);
const newIndex = index + 1;
setIndex(newIndex);
slider?.current?.scrollToIndex({
index: index,
animated: true,
});
};
const startInterval = useCallback(() => {
intervalId = setInterval(onSlideChange, 3000);
}, [onSlideChange]);
useEffect(() => {
startInterval();
return () => {
clearInterval(intervalId);
};
}, [onSlideChange]);
const viewabilityConfigCallbackPairs = useRef([
{viewabilityConfig, onViewableItemsChanged},
]);
const renderIndicator = ()=>{
const indicators = [];
data.map((val,key)=>(
indicators.push(
<Text
key={key}
style={
key === index % data.length ? {color: 'lightblue',fontSize:10,marginBottom: 8,marginHorizontal:1} :
{color: '#888',fontSize:10,marginBottom: 8,marginHorizontal:1}
}>
⬤
</Text>
)
));
return indicators;
}
return (
<View style={{width: dimension.width,height: 280, backgroundColor: '#fff'}}>
<FlatList
ref={slider}
horizontal
pagingEnabled
snapToInterval={dimension?.width}
decelerationRate="fast"
bounces={false}
showsHorizontalScrollIndicator={false}
data={dataState}
renderItem={({item, index}) => (
<>
<View>
<Image
source={{uri: `${item.url}`}}
style={{
width: dimension?.width,
height: 250,
resizeMode: 'cover',
}}
PlaceholderContent={<ActivityIndicator />}
/>
</View>
</>
)}
viewabilityConfigCallbackPairs={viewabilityConfigCallbackPairs.current}
getItemLayout={(data, index) => ({
length: dimension?.width,
offset: dimension?.width * index,
index,
})}
windowSize={1}
initialNumToRender={1}
maxToRenderPerBatch={1}
removeClippedSubviews={true}
/>
<View
style={{
flexDirection: 'row',
position: 'absolute',
bottom: 0,
alignSelf: 'center',
}}>
{renderIndicator()}
</View>
</View>
);
};
const styles = StyleSheet.create({});
export default HomeCarousel;
The data that is passed as the props to this component is
export const carouselImages = [
{url: 'https://i.ibb.co/FDwNR9d/img1.jpg'},
{url: 'https://i.ibb.co/7G5qqGY/1.jpg'},
{url: 'https://i.ibb.co/Jx7xqf4/pexels-august-de-richelieu-4427816.jpg'},
{url: 'https://i.ibb.co/GV08J9f/pexels-pixabay-267202.jpg'},
{url: 'https://i.ibb.co/sK92ZhC/pexels-karolina-grabowska-4210860.jpg'},
];

Ooooooh, I fixed it myself
Here is the perfectly working code full code. 😄
import React, {
useEffect,
useState,
useRef,
useCallback,
createRef,
} from 'react';
import {
StyleSheet,
View,
Dimensions,
FlatList,
LayoutAnimation,
UIManager,
Text,
} from 'react-native';
import {ActivityIndicator} from 'react-native';
import {Image} from 'react-native-elements';
const HomeCarousel = ({data}) => {
const [dimension, setDimension] = useState(Dimensions.get('window'));
const [index, setIndex] = useState(0);
const [dataState, setDataState] = useState(data);
const [indicatorIndex, setindicatorIndex] = useState();
slider = createRef();
let intervalId = null;
const onChange = () => {
setDimension(Dimensions.get('window'));
};
useEffect(() => {
Dimensions.addEventListener('change', onChange);
return () => {
Dimensions.removeEventListener('change', onChange);
};
});
useEffect(() => {
if (Platform.OS === 'android') {
UIManager.setLayoutAnimationEnabledExperimental(true);
}
}, []);
viewabilityConfig = {
viewAreaCoveragePercentThreshold: 50,
};
const onViewableItemsChanged = ({viewableItems, changed}) => {
if (viewableItems.length > 0) {
let currentIndex = viewableItems[0].index;
if (currentIndex % data.length === data.length - 1) {
setIndex(currentIndex), setindicatorIndex(currentIndex);
setDataState(dataState => [...dataState, ...data]);
} else {
console.log(currentIndex, 'else');
setIndex(currentIndex);
setindicatorIndex(currentIndex);
}
}
};
const onSlideChange = () => {
LayoutAnimation.configureNext(LayoutAnimation.Presets.easeIn);
const newIndex = index + 1;
setIndex(newIndex);
slider?.current?.scrollToIndex({
index: index,
animated: true,
});
};
const startInterval = useCallback(() => {
intervalId = setInterval(onSlideChange, 3000);
}, [onSlideChange]);
useEffect(() => {
startInterval();
return () => {
clearInterval(intervalId);
};
}, [onSlideChange]);
const viewabilityConfigCallbackPairs = useRef([
{viewabilityConfig, onViewableItemsChanged},
]);
const renderIndicator = () => {
const indicators = [];
data.map((val, key) =>
indicators.push(
<Text
key={key}
style={
key === indicatorIndex % data.length
? {
color: 'lightblue',
fontSize: 10,
marginBottom: 8,
marginHorizontal: 1,
}
: {
color: '#888',
fontSize: 10,
marginBottom: 8,
marginHorizontal: 1,
}
}>
⬤
</Text>,
),
);
return indicators;
};
return (
<View
style={{width: dimension.width, height: 280, backgroundColor: '#fff'}}>
<FlatList
ref={slider}
horizontal
pagingEnabled
snapToInterval={dimension?.width}
decelerationRate="fast"
bounces={false}
showsHorizontalScrollIndicator={false}
data={dataState}
renderItem={({item, index}) => (
<>
<View>
<Image
source={{uri: `${item.url}`}}
style={{
width: dimension?.width,
height: 250,
resizeMode: 'cover',
}}
PlaceholderContent={<ActivityIndicator />}
/>
</View>
</>
)}
viewabilityConfigCallbackPairs={viewabilityConfigCallbackPairs.current}
getItemLayout={(data, index) => ({
length: dimension?.width,
offset: dimension?.width * index,
index,
})}
windowSize={1}
initialNumToRender={1}
maxToRenderPerBatch={1}
removeClippedSubviews={true}
/>
<View
style={{
flexDirection: 'row',
position: 'absolute',
bottom: 0,
alignSelf: 'center',
}}>
{renderIndicator()}
</View>
</View>
);
};
const styles = StyleSheet.create({});
export default HomeCarousel;

React Native Expo-Camera recording video find problem User rejected audio permission needed

I'm having trouble recording video with expo-camera. User rejected audio permission needed. Has anyone had such a problem?? If anyone tells me the way to solve the problem, I also added expo install expo-permissions. But it still doesn't work
taking snap working fine just problem through recoding video...Here is my code.
import React, { useState, useRef, useEffect } from "react";
import {
StyleSheet,
Dimensions,
View,
Text,
TouchableOpacity,
SafeAreaView,
} from "react-native";
import { Camera } from "expo-camera";
import { Video } from "expo-av";
const WINDOW_HEIGHT = Dimensions.get("window").height;
const closeButtonSize = Math.floor(WINDOW_HEIGHT * 0.032);
const captureSize = Math.floor(WINDOW_HEIGHT * 0.09);
export default function App() {
const [hasPermission, setHasPermission] = useState(null);
const [cameraType, setCameraType] = useState(Camera.Constants.Type.back);
const [isPreview, setIsPreview] = useState(false);
const [isCameraReady, setIsCameraReady] = useState(false);
const [isVideoRecording, setIsVideoRecording] = useState(false);
const [videoSource, setVideoSource] = useState(null);
const cameraRef = useRef();
useEffect(() => {
(async () => {
const { status } = await Camera.requestPermissionsAsync()
setHasPermission(status === "granted");
})();
}, []);
const onCameraReady = () => {
setIsCameraReady(true);
};
const takePicture = async () => {
if (cameraRef.current) {
const options = { quality: 0.5, base64: true, skipProcessing: true };
const data = await cameraRef.current.takePictureAsync(options);
const source = data.uri;
if (source) {
await cameraRef.current.pausePreview();
setIsPreview(true);
console.log("picture source", source);
}
}
};
const recordVideo = async () => {
if (cameraRef.current) {
try {
const videoRecordPromise = cameraRef.current.recordAsync();
if (videoRecordPromise) {
setIsVideoRecording(true);
const data = await videoRecordPromise;
const source = data.uri;
if (source) {
setIsPreview(true);
console.log("video source", source);
setVideoSource(source);
}
}
} catch (error) {
console.warn(error);
}
}
};
const stopVideoRecording = () => {
if (cameraRef.current) {
setIsPreview(false);
setIsVideoRecording(false);
cameraRef.current.stopRecording();
}
};
const switchCamera = () => {
if (isPreview) {
return;
}
setCameraType((prevCameraType) =>
prevCameraType === Camera.Constants.Type.back
? Camera.Constants.Type.front
: Camera.Constants.Type.back
);
};
const cancelPreview = async () => {
await cameraRef.current.resumePreview();
setIsPreview(false);
setVideoSource(null);
};
const renderCancelPreviewButton = () => (
<TouchableOpacity onPress={cancelPreview} style={styles.closeButton}>
<View style={[styles.closeCross, { transform: [{ rotate: "45deg" }] }]} />
<View
style={[styles.closeCross, { transform: [{ rotate: "-45deg" }] }]}
/>
</TouchableOpacity>
);
const renderVideoPlayer = () => (
<Video
source={{ uri: videoSource }}
shouldPlay={true}
style={styles.media}
/>
);
const renderVideoRecordIndicator = () => (
<View style={styles.recordIndicatorContainer}>
<View style={styles.recordDot} />
<Text style={styles.recordTitle}>{"Recording..."}</Text>
</View>
);
const renderCaptureControl = () => (
<View style={styles.control}>
<TouchableOpacity disabled={!isCameraReady} onPress={switchCamera}>
<Text style={styles.text}>{"Flip"}</Text>
</TouchableOpacity>
<TouchableOpacity
activeOpacity={0.7}
disabled={!isCameraReady}
onLongPress={recordVideo}
onPressOut={stopVideoRecording}
onPress={takePicture}
style={styles.capture}
/>
</View>
);
if (hasPermission === null) {
return <View />;
}
if (hasPermission === false) {
return <Text style={styles.text}>No access to camera</Text>;
}
return (
<SafeAreaView style={styles.container}>
<Camera
ref={cameraRef}
style={styles.container}
type={cameraType}
flashMode={Camera.Constants.FlashMode.on}
onCameraReady={onCameraReady}
onMountError={(error) => {
console.log("cammera error", error);
}}
/>
<View style={styles.container}>
{isVideoRecording && renderVideoRecordIndicator()}
{videoSource && renderVideoPlayer()}
{isPreview && renderCancelPreviewButton()}
{!videoSource && !isPreview && renderCaptureControl()}
</View>
</SafeAreaView>
);
}
const styles = StyleSheet.create({
container: {
...StyleSheet.absoluteFillObject,
},
closeButton: {
position: "absolute",
top: 35,
left: 15,
height: closeButtonSize,
width: closeButtonSize,
borderRadius: Math.floor(closeButtonSize / 2),
justifyContent: "center",
alignItems: "center",
backgroundColor: "#c4c5c4",
opacity: 0.7,
zIndex: 2,
},
media: {
...StyleSheet.absoluteFillObject,
},
closeCross: {
width: "68%",
height: 1,
backgroundColor: "black",
},
control: {
position: "absolute",
flexDirection: "row",
bottom: 38,
width: "100%",
alignItems: "center",
justifyContent: "center",
},
capture: {
backgroundColor: "#f5f6f5",
borderRadius: 5,
height: captureSize,
width: captureSize,
borderRadius: Math.floor(captureSize / 2),
marginHorizontal: 31,
},
recordIndicatorContainer: {
flexDirection: "row",
position: "absolute",
top: 25,
alignSelf: "center",
justifyContent: "center",
alignItems: "center",
backgroundColor: "transparent",
opacity: 0.7,
},
recordTitle: {
fontSize: 14,
color: "#ffffff",
textAlign: "center",
},
recordDot: {
borderRadius: 3,
height: 6,
width: 6,
backgroundColor: "#ff0000",
marginHorizontal: 5,
},
text: {
color: "#fff",
},
});

Using expo-camera with expo-av you can do something like that:
const getPermissions = useCallback(
async () => {
const { status } = await Camera.requestPermissionsAsync();
await Audio.requestPermissionsAsync();
await Audio.setAudioModeAsync({
allowsRecordingIOS: true,
playsInSilentModeIOS: true,
});
setHasPermission(status === 'granted');
},
[sound, hasPermission],
)

Now in the expo camera, we have to ask for mic permission separately from the user. You can update your code like this:
const [hasCameraPermission, setHasCameraPermission] = useState(false);
const [hasMicPermission, setHasMicPermission] = useState(false);
useEffect(()=>{
(async () => {
const camStatus = await Camera.requestCameraPermissionsAsync();
if (camStatus.granted){
sethasCameraPermission(true)
}
const micStatus = await Camera.requestMicrophonePermissionsAsync();
if (micStatus.granted){
setHasMicPermission(true);}
})();
},[])

Uber eats type Horizontal ScrollSpy with scroll arrows

What i am looking for is uber eats type menu style with auto horizontal scroll if the menu categories are more then the total width that is available and When the user scroll down, the menu active links keeps changing according to the current category that being viewed.
I am using material-ui at the moment and its Appbar, Tabs and TabPanel only allow a single category items to be displayed at the same time, not all, i have to click on each category to view that category items, unlike uber eats where you can just keep scrolling down and the top menu categories indicator keeps on reflecting the current position.
I searched a lot but i didn't find any solution to my problem or even remotely related one too.
Any help, suggestion or guide will be appreciated or if there is any guide of something related to this that i have missed, link to that will be awesome.

By following this Code Sandbox
https://codesandbox.io/s/material-demo-xu80m?file=/index.js
and customizing it to my needs i did came up with my required scrolling effect by using MaterialUI.
The customized component code is:
import React from "react";
import throttle from "lodash/throttle";
import { makeStyles, withStyles } from "#material-ui/core/styles";
import useStyles2 from "../styles/storeDetails";
import Tabs from "#material-ui/core/Tabs";
import Tab from "#material-ui/core/Tab";
import { Grid } from "#material-ui/core";
import MenuCard from "./MenuCard";
const tabHeight = 69;
const StyledTabs = withStyles({
root: {
textAlign: "left !important",
},
indicator: {
display: "flex",
justifyContent: "center",
backgroundColor: "transparent",
"& > div": {
maxWidth: 90,
width: "100%",
backgroundColor: "rgb(69, 190, 226)",
},
},
})((props) => <Tabs {...props} TabIndicatorProps={{ children: <div /> }} />);
const StyledTab = withStyles((theme) => ({
root: {
textTransform: "none",
height: tabHeight,
textAlign: "left !important",
marginLeft: -30,
marginRight: 10,
fontWeight: theme.typography.fontWeightRegular,
fontSize: theme.typography.pxToRem(15),
[theme.breakpoints.down("sm")]: {
fontSize: theme.typography.pxToRem(13),
marginLeft: -10,
},
"&:focus": {
opacity: 1,
},
},
}))((props) => <Tab disableRipple {...props} />);
const useStyles = makeStyles((theme) => ({
root: {
flexGrow: 1,
},
indicator: {
padding: theme.spacing(1),
},
demo2: {
backgroundColor: "#fff",
position: "sticky",
top: 0,
left: 0,
right: 0,
width: "100%",
},
}));
const makeUnique = (hash, unique, i = 1) => {
const uniqueHash = i === 1 ? hash : `${hash}-${i}`;
if (!unique[uniqueHash]) {
unique[uniqueHash] = true;
return uniqueHash;
}
return makeUnique(hash, unique, i + 1);
};
const textToHash = (text, unique = {}) => {
return makeUnique(
encodeURI(
text
.toLowerCase()
.replace(/=>|<| \/>|<code>|<\/code>|'/g, "")
// eslint-disable-next-line no-useless-escape
.replace(/[!##\$%\^&\*\(\)=_\+\[\]{}`~;:'"\|,\.<>\/\?\s]+/g, "-")
.replace(/-+/g, "-")
.replace(/^-|-$/g, "")
),
unique
);
};
const noop = () => {};
function useThrottledOnScroll(callback, delay) {
const throttledCallback = React.useMemo(
() => (callback ? throttle(callback, delay) : noop),
[callback, delay]
);
React.useEffect(() => {
if (throttledCallback === noop) return undefined;
window.addEventListener("scroll", throttledCallback);
return () => {
window.removeEventListener("scroll", throttledCallback);
throttledCallback.cancel();
};
}, [throttledCallback]);
}
function ScrollSpyTabs(props) {
const [activeState, setActiveState] = React.useState(null);
const { tabsInScroll } = props;
let itemsServer = tabsInScroll.map((tab) => {
const hash = textToHash(tab.name);
return {
icon: tab.icon || "",
text: tab.name,
component: tab.products,
hash: hash,
node: document.getElementById(hash),
};
});
const itemsClientRef = React.useRef([]);
React.useEffect(() => {
itemsClientRef.current = itemsServer;
}, [itemsServer]);
const clickedRef = React.useRef(false);
const unsetClickedRef = React.useRef(null);
const findActiveIndex = React.useCallback(() => {
// set default if activeState is null
if (activeState === null) setActiveState(itemsServer[0].hash);
// Don't set the active index based on scroll if a link was just clicked
if (clickedRef.current) return;
let active;
for (let i = itemsClientRef.current.length - 1; i >= 0; i -= 1) {
// No hash if we're near the top of the page
if (document.documentElement.scrollTop < 0) {
active = { hash: null };
break;
}
const item = itemsClientRef.current[i];
if (
item.node &&
item.node.offsetTop <
document.documentElement.scrollTop +
document.documentElement.clientHeight / 8 +
tabHeight
) {
active = item;
break;
}
}
if (active && activeState !== active.hash) {
setActiveState(active.hash);
}
}, [activeState, itemsServer]);
// Corresponds to 10 frames at 60 Hz
useThrottledOnScroll(itemsServer.length > 0 ? findActiveIndex : null, 166);
const handleClick = (hash) => () => {
// Used to disable findActiveIndex if the page scrolls due to a click
clickedRef.current = true;
unsetClickedRef.current = setTimeout(() => {
clickedRef.current = false;
}, 1000);
if (activeState !== hash) {
setActiveState(hash);
if (window)
window.scrollTo({
top:
document.getElementById(hash).getBoundingClientRect().top +
window.pageYOffset,
behavior: "smooth",
});
}
};
React.useEffect(
() => () => {
clearTimeout(unsetClickedRef.current);
},
[]
);
const classes = useStyles();
const classes2 = useStyles2();
return (
<>
<nav className={classes2.rootCategories}>
<StyledTabs
value={activeState ? activeState : itemsServer[0].hash}
variant="scrollable"
scrollButtons="on"
>
{itemsServer.map((item2) => (
<StyledTab
key={item2.hash}
label={item2.text}
onClick={handleClick(item2.hash)}
value={item2.hash}
/>
))}
</StyledTabs>
<div className={classes.indicator} />
</nav>
<div className={classes2.root}>
{itemsServer.map((item1, ind) => (
<>
<h3 style={{ marginTop: 30 }}>{item1.text}</h3>
<Grid
container
spacing={3}
id={item1.hash}
key={ind}
className={classes2.menuRoot}
>
{item1.component.map((product, index) => (
<Grid item xs={12} sm={6} key={index}>
<MenuCard product={product} />
</Grid>
))}
</Grid>
</>
))}
</div>
</>
);
}
export default ScrollSpyTabs;
In const { tabsInScroll } = props; I am getting an array of categories objects, which themselves having an array of products inside them.
After my customization, this is the result:

Develop Reference

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Uber eats type Horizontal ScrollSpy with scroll arrows

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