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Absolute positioning a FlatList item react-native


Absolute positioning a FlatList item react-native

By : Bogdan Ostrovskiy
Date : November 20 2020, 03:01 PM
it helps some times One way to achieve this can be having an extra component that has an absolute positioning and opacity 0. When you press on an item you can turn pressed item's opacity to 0 and then render the extra component with the info from the pressed item and then you can give the desired animation. This way pressed item's row will be still filled but seen as empty. If this extra component be inside the FlatList item it can't go out of row's boundaries (as far as I know). You might need to calculate position of the pressed item to start animation of the extra component from.
code :


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react native animated flatlist item after item

react native animated flatlist item after item


By : user1428136
Date : March 29 2020, 07:55 AM
To fix this issue Maybe there is not the best solution but I am using the delay property of Animated.timing() and it works well for me.
My item component looks like this:
code :
export default class CustomItem extends Component {

    constructor(props) {
        super(props);

        this.state = {
            scaleValue: new Animated.Value(0)
        }
    }

    componentDidMount() {
        Animated.timing(this.state.scaleValue, {
            toValue: 1,
            duration : 600,
            delay: this.props.index * 350
        }).start();
    }

    render() {
        return (
            <Animated.View style={{ opacity: this.state.scaleValue }}>
                { this.props.children }
            </Animated.View>
        );
    }
}
...
renderItem(item) {
    return (
        <CustomItem index={ item.index } >
            <Text>{ item.first_name }</Text>
        </CustomItem>
    );
}

render() {
    return (
        <FlatList
            keyExtractor={this._keyExtractor}
            data={data }
            renderItem={ this.renderItem.bind(this) }
        />
    );
}
How to get a specific item of a Flatlist in React-Native

How to get a specific item of a Flatlist in React-Native


By : Jackson Louis
Date : November 12 2020, 04:01 AM
this one helps. If you want to navigate to a detail page when you tap an item of your list you should use a navigation library (react-navigation is the most popular).
I created a basic working example : https://snack.expo.io/@sanjar/so-53747271
React Native Flatlist Remove Item Removing Last Item

React Native Flatlist Remove Item Removing Last Item


By : user3006670
Date : March 29 2020, 07:55 AM
seems to work fine I forgot to run a componentDidUpdate based on the changing props. I was going to make a snack and then realized I forgot to save my code when I did a git stash:
I was thinking if I updated the props in the parent component that it would then automatically trigger a refresh by passing new props, but since the component is already mounted I needed to do the refresh after the fact.
code :
 componentDidUpdate(prevProps) {
    const { item } = this.props;
    if (prevProps.item !== this.props.item) {
      return fetch(`https://api.coincap.io/v2/assets/${item.card.slug}`)
      .then(response => response.json())
      .then(responseJson => {
        this.setState({
          coinInfo: responseJson.data
        });
      })
      .catch(error => {
        console.error(error);
      });
    }
  }
Position absolute children on flatlist element in React Native (expo)

Position absolute children on flatlist element in React Native (expo)


By : user3437589
Date : March 29 2020, 07:55 AM
will help you Position absolute didn't work inside a flatlist.
Now how to render positional elements inside it !!!!!!!....
React Native nested Flatlist (horizontal flatlist inside vertical flatlist)

React Native nested Flatlist (horizontal flatlist inside vertical flatlist)


By : user42211
Date : March 29 2020, 07:55 AM
I hope this helps you . When you are inside the .map you already are inside the this.state.catagories , but since you always use this.state.product1 for the flatlist2 you will always get the same result because this.state.product1 stays the same.
At flatlist2 change the data to item.products or item.whateverYouNeedHereButArray
code :
<View style={styles.innerFlatlist}>
      <FlatList
      horizontal={true} 
      data={item}
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