微信小程序實現文本的展開與收起

致謝 https://www.jianshu.com/p/9458083214cc

1、效果圖

 

 

2、js代碼

// pages/volunteer/active/info/activeInfo.js
const app = getApp();
Page({

  /**
   * 頁面的初始數據
   */
  data: {
    active:{},//活動詳情
    val:false
  },

  /**
   * 生命周期函數--監聽頁面加載
   */
  onLoad: function (options) {
    let id = options.id;
    //獲取活動詳情
    console.info("onReady")
    this.getActiveData(id);
  },

  /**
   * 生命周期函數--監聽頁面初次渲染完成
   */
  onReady: function () {
  },

  /**
   * 生命周期函數--監聽頁面顯示
   */
  onShow: function () {
    console.info("onshow")
  },

  /**
   * 生命周期函數--監聽頁面隱藏
   */
  onHide: function () {

    console.info("onHide")
  },

  /**
   * 生命周期函數--監聽頁面卸載
   */
  onUnload: function () {

    console.info("onUnload")
  },

  /**
   * 頁面相關事件處理函數--監聽用戶下拉動作
   */
  onPullDownRefresh: function () {

    console.info("onPullDownRefresh")
  },

  /**
   * 頁面上拉觸底事件的處理函數
   */
  onReachBottom: function () {

    console.info("onReachBottom")
  },

  /**
   * 用戶點擊右上角分享
   */
  onShareAppMessage: function () {

  },

  
  //獲取推薦
  getActiveData:function(id){
    console.info("***getActiveData****************************" + id);
    let _this = this;
    wx.request({
      url: app.globalData.serverIp + 'vol/active/getActiveInfo',
      method: "GET",
      data: {
        id: id,
      },
      success: function(res) {
        console.info("getActiveData**********************")
        console.info(res)
        if (res.data.code == 200) {
          _this.setData({
            active: res.data.data,
          })
        }
      },
      fail: function() {
        console.log("fail")
      }
    })
  },

  checkboxChange(e) {
      this.setData({
        val:!this.data.val
      })
  }


})

 

3、html代碼

<view class="page">

  <view class="pannel">
    
    <view class="pan-box">
      <!-- 頂部圖片 -->
      <view class="img-box"></view>

      <!-- 中部詳情 -->
      <view class="mid-box">

        <view class="layer4">
          <view class="layer5"></view>
          <text lines="1" class="word2">學習宣揚貫徹黨的十九大</text>
        </view>

        <view class="wrapper">
          <view class="text {{val?'atv':''}}">
            <label class="btn {{val?'atv_label':''}}" bindtap="checkboxChange"></label>
            學習宣傳貫徹黨的十九大學習宣傳貫徹黨的十九大學習宣傳貫徹黨的十九大學習宣傳貫徹黨的十九大學習宣傳貫徹黨的十九大學習宣傳貫徹黨的十九大學習宣傳貫徹黨的十九大學習宣傳貫徹黨的十九大學習宣傳貫徹黨的十九大學習宣傳貫徹黨的十九大
          </view>
        </view>

        <view class="layer7">
          <view class="group1">
            <text lines="1" class="info2">發起部門：</text>
            <text lines="1" class="txt1">組織部</text>
          </view>
        </view>

        <view class="layer8">
          <view class="layer9">
            <text lines="1" class="info3">活動時間：</text>
            <text lines="1" decode="true" class="word3">2019-08-11&nbsp;09:30&nbsp;&nbsp;~&nbsp;&nbsp;2019-08-12&nbsp;09:30</text>
          </view>
        </view>

        <view class="bm">
            <view class="bm-con">
              <text lines="1" class="bm-1">報名人數：</text>
              <text lines="1" class="bm-2">5/10</text>
            </view>
        </view>

        <a href="#" class="abs">分享@</a>
      </view>
      
      <!-- 底部活動安排 -->
      <view class="layer10">
        <text lines="1" class="word5">活動安排</text>
      </view>

      <view class="layer11">
        <view class="icon1"></view>
        <text lines="1" class="info4">為提高市民文明出行素質為主線</text>
      </view>

      <p  class="paragraph2">組織開展以改善社區環境生為主要內容的志願活動,組織志願者廣泛參與</p>

      <view class="layer12">
        <view class="icon1"></view>
        <text lines="1" class="info5">解決影響道路交通安全</text>
      </view>

      <p  class="infoBox1">衛生大掃除、清洗亂塗畫和“小廣告”、清理衛生死角、撿拾垃圾(果皮、紙屑)等活動</p>

    </view>
    
    <!-- 尾部立即報名 -->
    <view class="bottom_button">
      <text lines="1" class="button">立即報名</text>
    </view>

  </view>

</view> 

 

4、css代碼

.page {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background-color: #FFFFFF;
}

.pannel{
  width: 100%;
  height: 100%;
}

.bottom_button {
  z-index: 35;
  height: 88rpx;
  border: 1px  rgba(226,226,226,1);
  background-color: #F24C4E;
  background-size: 756rpx 94rpx;
  display: flex;
  flex-direction: column;
  padding-left: 318rpx;
  width: 750rpx;
  position: fixed;
  left: 0rpx;
  bottom: 0rpx;
  justify-content: center;
}


.button {
  width: 114rpx;
  height: 28rpx;
  overflow-wrap: break-word;
  color: rgba(255,255,255,1);
  font-size: 30rpx;
  font-family: SourceHanSansCN-Regular;
  text-align: right;
  white-space: nowrap;
  line-height: 30rpx;
  display: block;
}

.pan-box{
  width: 98%;
  margin: 0 auto;
}

.img-box{
  width: 710rpx;
  height: 375rpx;
  margin: 0 auto;
  margin-top: 40rpx;
  /* background: url(https://lanhu.oss-cn-beijing.aliyuncs.com/ps503qxduaqopoznzu7hvvey4jeyzpsoyff7217094-3137-40c5-b07d-a244ed812390) -18rpx 0rpx no-repeat; */
  /* background-size: 750rpx 375rpx; */
  background-color: #F24C4E;
  display: flex;
  flex-direction: column;
  border-radius: 15rpx;
}

.layer4 {
  width: 430rpx;
  height: 35rpx;
  flex-direction: row;
  display: flex;
  justify-content: space-between;
  margin: 30rpx 0 0 35rpx;
}

.layer5 {
  background-color: rgba(206,4,2,1.000000);
  border-radius: 50%;
  width: 16rpx;
  height: 16rpx;
  margin-top: 9rpx;
  display: flex;
  flex-direction: column;
}

.word2 {
  width: 393rpx;
  height: 35rpx;
  overflow-wrap: break-word;
  color: rgba(51,51,51,1);
  font-size: 36rpx;
  font-family: SourceHanSansCN-Bold;
  text-align: left;
  white-space: nowrap;
  line-height: 36rpx;
  display: block;
  font-weight:bold;
}


.layer7 {
  width: 687rpx;
  height: 26rpx;
  flex-direction: row;
  display: flex;
  justify-content: space-between;
  margin: 13rpx 0 0 35rpx;
}
.group1 {
  width: 191rpx;
  height: 23rpx;
  overflow-wrap: break-word;
  font-size: 0rpx;
  font-family: SourceHanSansCN-Light;
  text-align: left;
  white-space: nowrap;
  line-height: 24rpx;
}
.info2 {
  width: 191rpx;
  height: 23rpx;
  overflow-wrap: break-word;
  color: rgba(51, 51, 51, 1);
  font-size: 24rpx;
  font-family: SourceHanSansCN-Light;
  text-align: left;
  white-space: nowrap;
  line-height: 24rpx;
}
.txt1 {
  width: 191rpx;
  height: 23rpx;
  overflow-wrap: break-word;
  color: black;
  font-size: 24rpx;
  font-family: SourceHanSansCN-Regular;
  text-align: left;
  white-space: nowrap;
  line-height: 24rpx;
}

.layer8 {
  width: 693rpx;
  height: 25rpx;
  flex-direction: row;
  display: flex;
  justify-content: space-between;
  margin: 12rpx 0 0 35rpx;
}
.layer9 {
  width: 531rpx;
  height: 23rpx;
  overflow-wrap: break-word;
  font-size: 0rpx;
  font-family: SourceHanSansCN-Light;
  text-align: left;
  white-space: nowrap;
  line-height: 24rpx;
  margin-top: 2rpx;
}
.info3 {
  width: 531rpx;
  height: 23rpx;
  overflow-wrap: break-word;
  color: rgba(51, 51, 51, 1);
  font-size: 24rpx;
  font-family: SourceHanSansCN-Light;
  text-align: left;
  white-space: nowrap;
  line-height: 24rpx;
}
.word3 {
  width: 531rpx;
  height: 23rpx;
  overflow-wrap: break-word;
  color: black;
  font-size: 24rpx;
  font-family: SourceHanSansCN-Regular;
  text-align: left;
  white-space: nowrap;
  line-height: 24rpx;
}

.bm {
  width: 687rpx;
  height: 26rpx;
  flex-direction: row;
  display: flex;
  justify-content: space-between;
  margin: 13rpx 0 0 35rpx;
}
.bm-con {
  width: 191rpx;
  height: 23rpx;
  overflow-wrap: break-word;
  font-size: 0rpx;
  font-family: SourceHanSansCN-Light;
  text-align: left;
  white-space: nowrap;
  line-height: 24rpx;
}
.bm-1 {
  width: 191rpx;
  height: 23rpx;
  overflow-wrap: break-word;
  color: rgba(51, 51, 51, 1);
  font-size: 24rpx;
  font-family: SourceHanSansCN-Light;
  text-align: left;
  white-space: nowrap;
  line-height: 24rpx;
  margin-right: 360rpx;
}

.bm-2 {
  width: 191rpx;
  height: 23rpx;
  overflow-wrap: break-word;
  color: black;
  font-size: 24rpx;
  font-family: SourceHanSansCN-Regular;
  text-align: left;
  white-space: nowrap;
  line-height: 24rpx;
}

.mid-box{
  position: relative;
  /* border: 1px solid black; */
}

.abs{
  text-decoration: none;
  display: block;
  width: 86rpx;
  height: 40rpx;
  color: rgb(235, 10, 10);
  font-size: 24rpx;
  position: absolute;
  bottom: 0rpx;
  right: 10rpx;
  /* border: 1px solid black; */
}

.layer10 {
  border-radius: NaNrpx;
  height: 69rpx;
  display: flex;
  flex-direction: column;
  width: 195rpx;
  margin: 20rpx 0 0 4rpx;
  padding: 10rpx 0 0 29rpx;
}

.word5 {
  width: 143rpx;
  height: 42rpx;
  overflow-wrap: break-word;
  color: rgba(255,255,255,1);
  font-size: 26rpx;
  background-color: rgba(242,76,78,1.000000);
  border-radius: 20rpx 0 20rpx 0;
  font-family: SourceHanSansCN-Bold;
  text-align: center;
  line-height: 42rpx;
  display: block;
  justify-content: center;
  text-align: center;
}
.layer11 {
  width: 444rpx;
  height: 30rpx;
  flex-direction: row;
  display: flex;
  justify-content: space-between;
  margin: 1rpx 0 0 35rpx;
}
.icon1 {
  width: 9rpx;
  height: 20rpx;
  margin-top: 6rpx;
  background-color: red;
}
.info4 {
  width: 419rpx;
  height: 30rpx;
  overflow-wrap: break-word;
  color: rgba(36,45,57,1);
  font-size: 30rpx;
  font-family: SourceHanSansCN-Bold;
  text-align: left;
  white-space: nowrap;
  line-height: 30rpx;
  display: block;
  font-weight: bold;
}
.paragraph2 {
  width: 624rpx;
  color: rgba(36,45,57,1);
  font-size: 28rpx;
  font-family: SourceHanSansCN-Normal;
  text-align: left;
  display: block;
  margin: 15rpx 0 0 60rpx;
}
.layer12 {
  width: 324rpx;
  height: 30rpx;
  flex-direction: row;
  display: flex;
  justify-content: space-between;
  margin: 42rpx 0 0 35rpx;
}
.label2 {
  width: 9rpx;
  height: 20rpx;
  margin-top: 6rpx;
}
.info5 {
  width: 300rpx;
  height: 30rpx;
  overflow-wrap: break-word;
  color: rgba(36,45,57,1);
  font-size: 30rpx;
  font-family: SourceHanSansCN-Bold;
  text-align: left;
  white-space: nowrap;
  line-height: 30rpx;
  display: block;
  font-weight: bold;
}
.infoBox1 {
  width: 642rpx;
  color: rgba(36,45,57,1);
  font-size: 28rpx;
  font-family: SourceHanSansCN-Normal;
  text-align: left;
  display: block;
  margin: 15rpx 0 0 60rpx;
}

.wrapper {
  display: flex;
  margin: 15rpx auto;
  width: 677rpx;
  overflow: hidden;
}
.text {
  margin: 0 auto;
  padding: 0;
  font-size: 24rpx;
  color: rgba(153, 153, 153, 1);
  overflow: hidden;
  text-overflow: clip;
  text-align: left;
  position: relative;
  line-height: 39rpx;
  max-height: 80rpx;
}

.text::before {
  content: '';
  height: calc(100% - 23px);
  float: right;
}

.btn {
  /* border: 1rpx solid black; */
  position: relative;
  float: right;
  clear: both;
  margin:0;
  font-size: 24rpx;
  padding: 0 ;
  /* padding-top: 1rpx; */
  line-height: 38rpx;
  height: 30rpx;
  color: rgb(233, 16, 16);
}
.btn::before {
  content: '';
  position: absolute;
  left: -5rpx;
  color: rgb(10, 1, 1);
  transform: translateX(-100%)
}

.btn::after {
  content: '[展開]'
}

.atv {
  max-height: none;
}

.atv_label::after {
  content: '[收起]'
}

.atv_label::before {
  /*在展開狀態下隱藏省略號*/
  visibility: hidden;
}