CSS3如何实现微信拆红包动画效果

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用CSS3绘制红包

.redpack {  height: 450px;  background: #A5423A;  width: 300px;  left: 0;  top: 0;  border-radius: 10px;  margin: 0 auto;}.topcontent {    height: 300px;    border: 1px solid #BD503A;    background-color: #BD503A;    border-radius: 10px 10px 50% 50% / 10px 10px 15% 15%;    box-shadow: 0px 4px 0px -1px rgba(0,0,0,0.2);}#redpack-open {    width: 100px;    height: 100px;    border: 1px solid #FFA73A;    background-color: #FFA73A;    border-radius: 50%;    color: #fff;    font-size: 20px;    display: inline-block;    margin-top: -50px;    box-shadow: 0px 4px 0px 0px rgba(0, 0, 0, 0.2);}

<div class='redpack'>  <!--  红包的顶部盖子 -->  <div class="topcontent"></div>  <!-- 拆红包的按钮 -->  <div id="redpack-open"></div></div>

效果如图：

用React来区分不同的状态的转换

用React.js来实现的话，主要通过判断state来控制红包现在是等待拆开还是已经拆开过，具体的代码如下

import React from 'react';class ReadPacket extends React.Component {    constructor(props) {        super(props);        this.state = {            animation: false,            status: 0  // 0: 等待拆开 1: 拆开后        };    }    render() {        var bonus = this.props.thanks ? 0 : parseFloat(this.props.surveyInfo.bonus);        if(this.state.status == 0) {            return (                <div className='redpack-container' id='redpack-container'>                    <div className='redpack'>                        <div className='topcontent'>                            <div id='redpack-opened'>                              <div className='redpack-avatar'>                                <img src='Http://placehold.it/80x80' alt='头像' width='80' height='80'/>                              </div>                            </div>                            <h3 style={{marginTop: 80, color: 'white'}}>奖励</h3>                            <span className='redpack-text'>点击下方按钮领取红包</span>                            <div className='redpack-description white-text'>恭喜发财 大吉大利</div>                        </div>                        <div id='redpack-open' className={this.state.animation ? 'rotate' : ''}                             onClick={this.openRedPacket.bind(this)}                        >                            <span>拆红包</span>                        </div>                    </div>                </div>            );        } else if (bonus == 0) {            // 谢谢参与            return (                <div className='redpack-container' id='redpack-container'>                    <div className='redpack'>                        <div className='topcontent-open'>                            <div className='redpack-avatar'>                                <span id='close'></span>                            </div>                            <h2 style={{marginTop: 180, color: 'white'}}> 谢谢参与 </h2>                            <span className='redpack-text'>多多参与的奖励的机会更多哦</span>                            <br/>                            <a onClick={this._toWallet.bind(this)}                               style={{cursor:'pointer',textDecoration: 'underline', color: 'white'}}>                                去我的账户查看                            </a>                        </div>                        <div id='redpack-opened'>                          <div className='redpack-avatar'>                            <img src='http://placehold.it/80x80' alt='头像' width='80' height='80'/>                          </div>                        </div>                    </div>                </div>            );        } else {            // 显示奖励金额            return (                <div className='redpack-container' id='redpack-container'>                    <div className='redpack'>                        <div className='topcontent-open'>                            <div className='redpack-avatar'>                                <span id='close'></span>                            </div>                            <h2 className='white-text' style={{marginTop: 180}}> {bonus.toFixed(2)} </h2>                            <span className='redpack-text'>奖励积分已经存入您的账户</span>                            <a className='btn-flat white-text' onClick={this._toWallet.bind(this)}                               style={{textDecoration: 'underline'}}>                                去我的账户查看积分                            </a>                        </div>                        <div id='redpack-opened'>                          <div className='redpack-avatar'>                            <img src='http://placehold.it/80x80' alt='头像' width='80' height='80'/>                          </div>                        </div>                    </div>                </div>            );        }    }    stopAnimation() {        this.setState({animation: false});    }    showResult() {        this.setState({status: 1});    }    openRedPacket() {        this.setState({animation: true});        setTimeout(this.stopAnimation.bind(this), 3000);        setTimeout(this.showResult.bind(this), 4000);    }    _toWallet() {      // 跳转到钱包      window.location.hash = '/wallet';    }}export default ReadPacket;

CSS的基本语法是什么

css的基本语法是：

1、css规则由选择器和一条或多条声明两个部分构成；

2、选择器通常是需要改变样式的html元素；

3、每条声明由一个属性和一个值组成；

4、属性和属性值被冒号分隔开。

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