微信小程序实现星星评价效果

<!--pages/evaluatepage/evaluatepage.wxml-->

<view class='container'>
 <view class='evaluate_contant'>
 <!--外层循环控制有几个评价条目 -->
 <block wx:for='{{evaluate_contant}}' wx:key='' wx:for-index='idx'>
 <view class='evaluate_item'>
  <view class='evaluate_title'>{{item}}</view>

  <!--星星评价 -->
  <view class='evaluate_box'>
  <!--内层循环展示每个评价条目的星星 -->
  <block wx:for="{{stars}}" wx:key=''>
  <image class="star-image" style="left: {{item*80}}rpx" src="{{scores[idx] > item ?(scores[idx]-item == 0.5?halfSrc:selectedSrc) : normalSrc}}">
  <view class="item" style="left:0rpx" data-score="{{item + 0.5}}" data-idx='{{idx}}' bindtap="selectLeft"></view>
  <view class="item" style="left:20rpx" data-score="{{item + 1}}" data-idx='{{idx}}' bindtap="selectRight"></view>
  </image>
  </block>
  </view>

 </view>
 </block>
 <button class='submit_button' bindtap='submit_evaluate' type='primary'>提交</button>
 </view>
</view>

Page({

 data: {
 evaluate_contant: ['评价条目一', '评价条目二', '评价条目三',],
 stars: [0, 1, 2, 3, 4],
 normalSrc: '../../images/no-star.png',
 selectedSrc: '../../images/full-star.png',
 halfSrc: '../../images/half-star.png',
 score: 0,
 scores: [0, 0, 0],
 },

 // 提交事件
 submit_evaluate: function () {
 console.log('评价得分' + this.data.scores)
 },

 //点击左边,半颗星
 selectLeft: function (e) {
 var score = e.currentTarget.dataset.score
 if (this.data.score == 0.5 && e.currentTarget.dataset.score == 0.5) {
 score = 0;
 }

 this.data.scores[e.currentTarget.dataset.idx] = score,
 this.setData({
 scores: this.data.scores,
 score: score
 })

 },

 //点击右边,整颗星
 selectRight: function (e) {
 var score = e.currentTarget.dataset.score

 this.data.scores[e.currentTarget.dataset.idx] = score,
 this.setData({
 scores: this.data.scores,
 score: score
 })
 }
})

/*评价区域 */
.container .evaluate_contant .evaluate_item {
 font-size: 30rpx;
 color: gray;
 margin-left: 20rpx;
 margin-top: 30rpx;
}

/*评价标题 */
.container .evaluate_contant .evaluate_item .evaluate_title {
 display: inline-block;
}

/*评价盒子 */
.container .evaluate_contant .evaluate_item .evaluate_box {
 position: absolute;
 left: 220rpx;
 width: 100%;
 display: inline-block;
}

/*星星评价的每个图片 */
.container .evaluate_contant .evaluate_item .evaluate_box .star-image {
 position: absolute;
 width: 40rpx;
 height: 40rpx;
 src: "../../images/no-star.png";
}

/*星星的左边和右边区域<点击左边半个星星，点击右边整个星星> */
.container .evaluate_contant .evaluate_item .evaluate_box .star-image .item {
 position: absolute;
 top: 0rpx;
 width: 20rpx;
 height: 40rpx;
}

/*按钮 */
.container .evaluate_contant .submit_button {
 height: 60rpx;
 font-size: 30rpx;
 line-height: 60rpx;
 margin: 20rpx;
}