import { View, StyleSheet, Platform } from 'react-native';
import * as ImagePicker from 'expo-image-picker';
import { useState, useRef } from 'react';
import { GestureHandlerRootView } from 'react-native-gesture-handler';
import * as MediaLibrary from 'expo-media-library';
import { captureRef } from 'react-native-view-shot';
import { type ImageSource } from "expo-image";
import Button from '@/components/Button';
import ImageViewer from '@/components/ImageViewer';
import IconButton from '@/components/IconButton';
import CircleButton from '@/components/CircleButton';
import EmojiPicker from '@/components/EmojiPicker';
import EmojiList from '@/components/EmojiList';
import EmojiSticker from '@/components/EmojiSticker';
const PlaceholderImage = require('@/assets/images/background-image.png');
export default function Index() {
const [selectedImage, setSelectedImage] = useState<string | undefined>(undefined);
const [showAppOptions, setShowAppOptions] = useState<boolean>(false);
const [isModalVisible, setIsModalVisible] = useState<boolean>(false);
const [pickedEmoji, setPickedEmoji] = useState<ImageSource | undefined>(undefined);
const [status, requestPermission] = MediaLibrary.usePermissions();
const imageRef = useRef<View>(null);
if (status === null) {
requestPermission();
}
const pickImageAsync = async () => {
let result = await ImagePicker.launchImageLibraryAsync({
mediaTypes: ['images'],
allowsEditing: true,
quality: 1,
});
if (!result.canceled) {
setSelectedImage(result.assets[0].uri);
setShowAppOptions(true);
} else {
alert('You did not select any image.');
}
};
const onReset = () => {
setShowAppOptions(false);
};
const onAddSticker = () => {
setIsModalVisible(true);
};
const onModalClose = () => {
setIsModalVisible(false);
};
`problematic function`
const onSaveImageAsync = async () => {
try {
if (!imageRef.current) {
throw new Error('View reference is not available');
}
const localUri = await captureRef(imageRef.current, {
height: 440,
quality: 1,
format: 'png', // Explicitly set format
result: Platform.OS === 'ios' ? 'tmpfile' : 'data-uri', // Different result types for iOS/Android
});
if (!localUri) {
throw new Error('Failed to capture view');
}
await MediaLibrary.saveToLibraryAsync(localUri);
alert('Saved!');
} catch (e) {
console.log(e);
}
};
return (
<GestureHandlerRootView style={styles.container}>
<View style={styles.imageContainer}>
<View ref={imageRef} collapsable={false}>
<ImageViewer imgSource={PlaceholderImage} selectedImage={selectedImage} />
{pickedEmoji && <EmojiSticker imageSize={40} stickerSource={pickedEmoji} />}
</View>
</View>
{showAppOptions ? (
<View style={styles.optionsContainer}>
<View style={styles.optionsRow}>
<IconButton icon="refresh" label="Reset" onPress={onReset} />
<CircleButton onPress={onAddSticker} />
<IconButton icon="save-alt" label="Save" onPress={onSaveImageAsync} />
</View>
</View>
) : (
<View style={styles.footerContainer}>
<Button theme="primary" label="Choose a photo" onPress={pickImageAsync} />
<Button label="Use this photo" onPress={() => setShowAppOptions(true)} />
</View>
)}
<EmojiPicker isVisible={isModalVisible} onClose={onModalClose}>
<EmojiList onSelect={setPickedEmoji} onCloseModal={onModalClose} />
</EmojiPicker>
</GestureHandlerRootView>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#25292e',
alignItems: 'center',
},
imageContainer: {
flex: 1,
},
footerContainer: {
flex: 1 / 3,
alignItems: 'center',
},
optionsContainer: {
position: 'absolute',
bottom: 80,
},
optionsRow: {
alignItems: 'center',
flexDirection: 'row',
},
});
this is the page im getting the problem, the error is probably something with the onSaveImageAsync
function.
I could not get ChatGPT
to find the problem
the message I get when I try to save is
[Error: Failed to snapshot view tag 14]
I tried asking ChatGPT
and Claudia
but they could not help,
this code is also the original tutorial code from
https://docs.expo.dev/tutorial/screenshot/
2
Answers
If you’re using Expo SDK 52, the issue is likely related to that. I recently updated from SDK 51 to 52 and experienced the same error. This update also involved upgrading the react-native-view-shot library from version 3.8.0 to 4.0.0.
I have the same problem and I am on SDK 52.
react-native-view-shot: 4.0.2