I’m trying to scroll user in the end whenever the screen is opened, I’m using Flashlist and using its initialScrollIndex prop to do that however it doesn’t work in my case can you please help me to use this initialScrollIndex prop proplery to make things works?
In my case I’m developing a chat app so when user opens the chats it take user to the last message chat which is there in the end of the Flashlist by Shopify
import * as React from 'react';
import { Button, Text, View, StyleSheet, SafeAreaView } from 'react-native';
import { FlashList } from '@shopify/flash-list';
const chatMessages = [
{ id: 1, text: 'Hello', sender: 'Alice' },
{ id: 2, text: 'Hi there!', sender: 'Bob' },
{ id: 3, text: 'How are you?', sender: 'Alice' },
{ id: 4, text: "I'm doing well, thanks! How about you?", sender: 'Bob' },
{ id: 5, text: "I'm great too, thanks for asking!", sender: 'Alice' },
{ id: 6, text: 'What have you been up to lately?', sender: 'Alice' },
{ id: 7, text: "I've been working on a new project at work. It's been quite challenging but exciting.", sender: 'Bob' },
{ id: 8, text: 'That sounds interesting! Tell me more about it.', sender: 'Alice' },
{ id: 9, text: "Sure! I'm working on developing a mobile app for our company. It's aimed at improving our customer experience.", sender: 'Bob' },
{ id: 10, text: 'That sounds like a valuable project. What features are you planning to include in the app?', sender: 'Alice' },
{ id: 11, text: "We're focusing on features such as easy product browsing, personalized recommendations, and a seamless checkout process.", sender: 'Bob' },
{ id: 12, text: 'Those are important aspects for a good user experience. Are you using any specific technologies for the development?', sender: 'Alice' },
{ id: 13, text: "Yes, we're using React Native for the front-end development and Node.js for the back-end. It allows us to build for both iOS and Android platforms.", sender: 'Bob' },
{ id: 14, text: 'That sounds like a solid tech stack. Are you facing any challenges during the development?', sender: 'Alice' },
{ id: 15, text: "One of the challenges we've encountered is optimizing the app's performance on older devices. We're working on finding solutions to improve it.", sender: 'Bob' },
{ id: 16, text: 'Performance optimization is crucial, especially for a mobile app. I hope you find the right solutions for it.', sender: 'Alice' },
{ id: 17, text: 'Thank you! Wee putting in our best efforts. How about you? Have you been working on any interesting projects?', sender: 'Bob' },
{ id: 18, text: 'Yes, I recently started working on a machine learning project. It involves analyzing large datasets to make predictions.', sender: 'Alice' },
{ id: 19, text: 'That sounds fascinating! What kind of predictions are you trying to make?', sender: 'Bob' },
{ id: 20, text: "We're working on predicting customer churn for a subscription-based service. It helps the company identify at-risk customers and take proactive measures to retain them.", sender: 'Alice' },
{ id: 21, text: 'Customer churn prediction can be highly valuable for businesses. How are you approaching the analysis?', sender: 'Bob' },
{ id: 22, text: "We're using a combination of machine learning algorithms such as logistic regression, random forest, and gradient boosting to train and evaluate our predictive models.", sender: 'Alice' },
{ id: 23, text: 'Sounds like a comprehensive approach. Are you using any specific tools or libraries for the analysis?', sender: 'Bob' },
{ id: 24, text: 'Yes, we primarily use Python for the data analysis and scikit-learn, pandas, and numpy libraries for implementing the machine learning algorithms.', sender: 'Alice' },
{ id: 25, text: 'Those are popular tools and libraries in the data science community. How is the progress so far?', sender: 'Bob' },
{ id: 26, text: 'We are still in the early stages, but initial results look promising. We plan to fine-tune the models and explore other techniques to further improve accuracy.', sender: 'Alice' },
{ id: 27, text: 'That sounds like an exciting project! I wish you all the best with it.', sender: 'Bob' },
{ id: 28, text: 'Thank you! I appreciate your support. By the way, do you have any recommendations for resources to learn more about mobile app design?', sender: 'Alice' },
{ id: 29, text: 'Absolutely! I recommend checking out websites like Dribbble and Behance for design inspiration. Also, the book "Dont Make Me Think" by Steve Krug is a great resource for usability and user experience.', sender: 'Bob' },
{ id: 30, text: 'Thank you for the suggestions! I will definitely look into them.', sender: 'Alice' },
{ id: 31, text: 'Youre welcome! If you have any more questions or need further assistance, feel free to ask.', sender: 'Bob' },
{ id: 32, text: 'Sure, I will keep that in mind. Thanks again!', sender: 'Alice' },
{ id: 33, text: 'No problem. Have a great day!', sender: 'Bob' },
{ id: 34, text: 'You too! Take care!', sender: 'Alice' },
{ id: 35, text: 'Goodbye!', sender: 'Bob' },
{ id: 36, text: 'Goodbye!', sender: 'Alice' },
{ id: 37, text: 'Hey there!', sender: 'Alice' },
{ id: 38, text: 'Hi! How can I assist you today?', sender: 'Bob' },
{ id: 39, text: 'I have a question about website development.', sender: 'Alice' },
{ id: 40, text: 'Sure, go ahead and ask your question. Ill do my best to help you.', sender: 'Bob' },
{ id: 41, text: 'I want to create a responsive website. What are some key principles to keep in mind?', sender: 'Alice' },
{ id: 42, text: 'When designing a responsive website, it is important to prioritize mobile-friendly design, use fluid grids and flexible images, and implement media queries to adapt the layout based on screen size.', sender: 'Bob' },
{ id: 43, text: 'Thank you for the guidance. Are there any popular CSS frameworks that can assist in building responsive websites?', sender: 'Alice' },
{ id: 44, text: 'Yes, there are several popular CSS frameworks that provide responsive grid systems and pre-built components. Some popular ones include Bootstrap, Foundation, and Bulma.', sender: 'Bob' },
{ id: 45, text: 'I will explore those frameworks. Are there any resources you recommend for learning more about responsive web design?', sender: 'Alice' },
{ id: 46, text: 'Certainly! You can start with the "Responsive Web Design" course by Kevin Powell on freeCodeCamp.org. It covers the fundamentals and provides hands-on examples.', sender: 'Bob' },
{ id: 47, text: 'That sounds like a great starting point. I appreciate your help!', sender: 'Alice' },
{ id: 48, text: 'Youre welcome! If you have any more questions or need further assistance, feel free to ask.', sender: 'Bob' },
{ id: 49, text: 'I will. Thanks again!', sender: 'Alice' },
{ id: 50, text: 'No problem. Happy to help! Have a wonderful day!', sender: 'Bob' },
{ id: 51, text: 'You too! Take care!', sender: 'Alice' },
{ id: 52, text: 'Goodbye!', sender: 'Bob' },
{ id: 53, text: 'Goodbye!', sender: 'Alice' }
];
export default function App() {
const [showList, setShowList] = React.useState(false);
return (
<SafeAreaView style={{ flex: 1, padding: 50 }}>
{!showList ? (
<View style={styles.container}>
<Button title="Show list" onPress={() => setShowList(true)} />
</View>
) : (
<View style={styles.container}>
<FlashList
initialScrollIndex={chatMessages.length - 1} // Scroll to the last message initially
estimatedItemSize={100}
data={chatMessages}
ListHeaderComponent={
<View
style={{
alignItems: 'center',
justifyContent: 'center',
borderWidth: 1,
borderColor: 'grey',
borderStyle: 'solid',
}}>
<Text>This is the header</Text>
<Button title="Hide list" onPress={() => setShowList(false)} />
</View>
}
renderItem={({ item }) => (
<View
style={{
alignItems: 'center',
justifyContent: 'center',
borderWidth: 1,
borderColor: 'grey',
borderStyle: 'solid',
}}>
<Text>{item.text}</Text>
<Text>Sender: {item.sender}</Text>
</View>
)}
/>
</View>
)}
</SafeAreaView>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
backgroundColor: '#ecf0f1',
},
});
