本文解释了如何在使用React的Android中处理触摸事件

以下是如何在使用React的Android中处理触摸事件。

React将使用以下方式捕获Android触摸事件：onTouchStart；onTouchMove；onTouchEnd

下面是如何在React网页应用中处理Android触摸事件的示例
 

import React from 'react';

export default class EventComponent extends React.Component {

  constructor(props) {
    super(props);

    this._onTouchStart = this._onTouchStart.bind(this);
    this._onTouchMove = this._onTouchMove.bind(this);
    this._onTouchEnd = this._onTouchEnd.bind(this);

    this.state = { swiped: false };
    this._swipe = {};
    this.minDistance = 50;
  }

  _onTouchStart(e) {
    const touch = e.touches[0];
    this._swipe = { x: touch.clientX };
    this.setState({ swiped: false });
  }

  _onTouchMove(e) {
    if (e.changedTouches && e.changedTouches.length) {
      const touch = e.changedTouches[0];
      this._swipe.swiping = true;
    }
  }

  _onTouchEnd(e) {
    const touch = e.changedTouches[0];
    const absX = Math.abs(touch.clientX - this._swipe.x);
    if (this._swipe.swiping && absX  this.minDistance ) {
      this.props.onSwiped && this.props.onSwiped();
      this.setState({ swiped: true });
    }
    this._swipe = {};
  }

  render() {
    return (

    );
  }

}