多个手势响应者同时

Question

I need some buttons that can be pressed at the same time, but currently if you press one, it 'claims' responsiveness and the others can't be pressed anymore. How do I do this?

Answer 1

Got it. You have to use ReactNativeEventEmitter to directly listen to touch events and bypass the Gesture Responder stuff entirely. Below is a decorator class that calls onTouchStart , onTouchEnd and onTouchMove in the wrapped class whenever those touch events are received.

'use strict';

import React, {Component} from 'react-native';
import ReactNativeEventEmitter from 'ReactNativeEventEmitter';
import NodeHandle from 'NodeHandle';

export const multitouchable = BaseComponent => {
    return class extends Component {

        constructor(props, context) {
            super(props, context);

            this.comp = null;
            this.compId = null;
        }

        componentDidMount() {
            if(this.comp && this.compId){
                this.comp.onTouchStart && ReactNativeEventEmitter.putListener(this.compId, 'onTouchStart', e => this.comp.onTouchStart(e));
                this.comp.onTouchEnd && ReactNativeEventEmitter.putListener(this.compId, 'onTouchEnd', e => this.comp.onTouchEnd(e));
                this.comp.onTouchMove && ReactNativeEventEmitter.putListener(this.compId, 'onTouchMove', e => this.comp.onTouchMove(e));
            }
        }

        componentWillUnmount() { 
            if(this.comp && this.compId){
                this.comp.onTouchStart && ReactNativeEventEmitter.deleteListener(this.compId, 'onTouchStart');
                this.comp.onTouchEnd && ReactNativeEventEmitter.deleteListener(this.compId, 'onTouchEnd');
                this.comp.onTouchMove && ReactNativeEventEmitter.deleteListener(this.compId, 'onTouchMove');
            }
        }

        render() {
            return (
                <BaseComponent {...this.props} {...this.state}
                    ref={c => {
                        this.comp = c;
                        const handle = React.findNodeHandle(c);
                        if(handle)
                            this.compId = NodeHandle.getRootNodeID(handle);
                    }}
                />
            );
        }
    };
}