微信小程序实现弹出层效果

<text class='rule' bindtap='showRule'>规则</text>

<!-- 规则提示 -->
 <view class="ruleZhezhao {{isRuleTrue?'isRuleShow':'isRuleHide'}}">
 <view class='ruleZhezhaoContent'>
  <view class='ruleZhezhaoText' wx:for='{{rule}}' wx:for-index='index'>
  <text>{{index+1}}</text>
  <text>{{item}}</text>
  </view>
  <image src='../../images/rule-hide.png' class='ruleHide' bindtap='hideRule'></image>
 </view>
 </view>
 <!-- end -->

/* 规则提示层 */
.isRuleShow{
 display: block;
}
.isRuleHide{
 display: none;
}
.ruleZhezhao{
 height: 100%;
 width: 100%;
 position: fixed;
 background-color:rgba(0, 0, 0, .5);
 z-index: 2;
 top: 0;
 left: 0;
}
.ruleZhezhaoContent{
 padding: 20rpx 0;
 width: 80%;
 background: #e1d2b1;
 margin: 40% auto;
 border-radius: 20rpx;
 display: flex;
 flex-direction: column;
 justify-content: space-around;
 align-items: center;
 position: relative;
}
.ruleZhezhaoText{
 width: 80%;
 font-size: 30rpx;
 color: #856d5f;
 display: flex;
 flex-direction: row;
 align-items: center;
 margin: 25rpx 0 25rpx 0;
}
.ruleZhezhaoText text:nth-child(1){
 color: #fff;
 font-size: 40rpx;
 height: 60rpx;
 width: 60rpx;
 background: #664a2c;
 display: block;
 text-align: center;
 line-height: 60rpx;
 border-radius: 30rpx;
 margin-right: 10rpx;
}
.ruleZhezhaoText text:nth-child(2){
 flex-wrap:wrap;
 width: 80%;
}
.ruleHide{
 height: 60rpx!important;
 width: 60rpx!important;
 position: absolute;
 top: -20rpx;
 right: -20rpx;
}
.rule{
 display: block;
 border: 1px solid #fff;
 width: 100rpx;
 text-align: center;
 line-height: 60rpx;
 color: #fff;
 height: 60rpx;
 font-size: 30rpx;
 border-radius: 30rpx;
 position: absolute;
 top: 10%;
 right: 5%;
}
/* end */

//打开规则提示
 showRule: function () {
 this.setData({
  isRuleTrue: true
 })
 },

//关闭规则提示
 hideRule: function () {
 this.setData({
  isRuleTrue: false
 })
 },