Multiple drag and drop simultaneous in React Native

Question

Hello i'm creating a game in react native and i'm stuck because i wan't both players can drag and drop horizontaly an element in same time on the same phone.

I have two components like that:

export class Player1 extends Component{
    constructor(props){
        super(props);

        this.state = {  
            pan             : new Animated.ValueXY()
        };
    }
    componentWillMount(){
        this.panResponder = PanResponder.create({    
            onMoveShouldSetResponderCapture : () => true,
            onMoveShouldSetPanResponderCapture : () => true,

            onPanResponderGrant : (e, gestureState) => {
                this.state.pan.setOffset({x: this.state.pan.x._value, y: this.state.pan.y._value});
                this.state.pan.setValue({x: 0, y: 0});
            },

            onPanResponderMove : Animated.event([null,{ 
                dx : this.state.pan.x,
            }]),
            onPanResponderRelease: (e, {vx, vy}) => {
            }
        });
    }


    render(){
        return (
                <View style={styles.mainContainer}>
                    {this.renderDraggable()}
                </View>
        );
    }

    renderDraggable(){
        return (
                <View style={styles.draggableContainer}>
                    <Animated.View                  
                    style={[this.state.pan.getLayout(), styles.triangle]}
                    {...this.panResponder.panHandlers}   > 
                    </Animated.View>
            </View>

        );
}
}

And in my screen i call my components like that:

export default function HomeScreen() {
  return (
    <View>
     <Player1></Player1>
     <Player2></Player2>
    </View>
  );
}

Thanks for your help

Answer 1

I found a solution, i used react-native-gesture-handle like in the directory doubleDraggable of the example: https://kmagiera.github.io/react-native-gesture-handler/docs/example.html

My Code:

import React, { Component } from 'react';
import { Animated, StyleSheet, View } from 'react-native';

import {
  PanGestureHandler,
  ScrollView,
  State,
} from 'react-native-gesture-handler';


export class Players extends Component {
  constructor(props) {
    super(props);
    this._translateX = new Animated.Value(0);
    this._translateY = new Animated.Value(0);
    this._lastOffset = { x: 0, y: 0 };
    this._onGestureEvent = Animated.event(
      [
        {
          nativeEvent: {
            translationX: this._translateX,

          },
        },
      ],

    );
  }
  _onHandlerStateChange = event => {
    if (event.nativeEvent.oldState === State.ACTIVE) {
      this._lastOffset.x += event.nativeEvent.translationX;
      this._translateX.setOffset(this._lastOffset.x);
      this._translateX.setValue(0);
      this._translateY.setOffset(this._lastOffset.y);
      this._translateY.setValue(0);
    }
  };
  render() {
    return (
      <PanGestureHandler
        {...this.props}
        onGestureEvent={this._onGestureEvent}
        onHandlerStateChange={this._onHandlerStateChange}>
        <Animated.View
          style={[
            styles.box,
            {
              transform: [
                { translateX: this._translateX },
                { translateY: this._translateY },
              ],
            },
            this.props.boxStyle,
          ]}
        />
      </PanGestureHandler>
    );
  }
}

export default class Example extends Component {
  render() {
    return (
      <View style={styles.scrollView}>
        <DraggableBox />
      </View>
    );
  }
}

const styles = StyleSheet.create({
  scrollView: {
    flex: 1,
  },
  box: {
    position: 'absolute',
    width: 0,
    height: 0,
    backgroundColor: 'transparent',
    borderStyle: 'solid',
    borderLeftWidth: 25,
    borderRightWidth: 25,
    borderBottomWidth: 50,
    borderLeftColor: 'transparent',
    borderRightColor: 'transparent',
  },
});

And Screen:

<View styles={styles.container}>
  <Players boxStyle={styles.player1}></Players>
  <Players boxStyle={styles.player2}></Players>
</View>