小程序星级评分的实现

<!--pages/test/test.wxml-->
<view>
<view>一:显示后台给的评分</view>
<block wx:for="{{one_1}}">
<image src='../../images/use_sc2.png'></image>
</block>
<block wx:for="{{two_1}}">
<image src='../../images/use_sc.png'></image>
</block>
</view>
<view>这里num给的是几分就显示几颗星星</view>
 
<view style='margin-top:60px;'>二:显示用户选择的评分</view>
<block wx:for="{{one_2}}" wx:key="index">
<image catchtap='in_xin' id='{{index+1}}' data-in='use_sc2' src='../../images/use_sc2.png'></image>
</block>
<block wx:for="{{two_2}}" wx:key="index">
<image catchtap='in_xin' id='{{index+1}}' data-in='use_sc' src='../../images/use_sc.png'></image>
</block>
<view>{{one_2}}星</view>

// pages/test/test.js
Page({
  /**
   * 统一满分为5星
   */
  data: {
    num: 4,//后端给的分数,显示相应的星星
    one_1: '',
    two_1: '',
    one_2: 0,
    two_2: 5
  },
  onLoad: function (options) {
    //情况一:展示后台给的评分
        this.setData({
          one_1: this.data.num,
          two_1: 5 - this.data.num
        })
  },
 
  //情况二:用户给评分
  in_xin:function(e){
    var in_xin = e.currentTarget.dataset.in;
    var one_2;
    if (in_xin === 'use_sc2'){
      one_2 = Number(e.currentTarget.id);
    } else {
      one_2 = Number(e.currentTarget.id) + this.data.one_2;
    }
    this.setData({
      one_2: one_2,
      two_2: 5 - one_2
    })
  }
})

/* pages/test/test.wxss */
image{
  height: 60rpx;
   60rpx;
  display: inline-block
}

代码可直接套用，需要更改图片地址