<view class="phone_one" bindtap="clickPerson"> <view class="phone_personal">{{firstPerson}}</view> <image src="../../image/v6.png" class="personal_image {{selectArea ? 'rotateRight' :''}}"></image> //三目法判斷圖片要不要旋轉180。 </view> <view class="person_box"> <view class="phone_select" hidden="{{selectPerson}}">  <view bindtap="mySelect">測試1</view>  <view bindtap="mySelect">測試2</view>  <view bindtap="mySelect">測試3</view> </view></view>

Page({ data:{ selectPerson:true, firstPerson:'個人', selectArea:false, }, //點擊選擇類型 clickPerson:function(){ var selectPerson = this.data.selectPerson; if(selectPerson == true){  this.setData({  selectArea:true,  selectPerson:false, }) }else{  this.setData({  selectArea:false,  selectPerson:true, }) } } , //點擊切換 mySelect:function(e){ this.setData({  firstPerson:e.target.dataset.me,  selectPerson:true,  selectArea:false, }) },}}

.phone_personal{ width: 100%; color:rgb(34, 154, 181); height:100rpx; line-height:100rpx; text-align: center;}.phone_one{ display: flex; //用flex布局更方便。 position: relative; justify-content: space-between; background-color:rgb(239, 239, 239); width:90%; height:100rpx; margin:0 auto; border-radius: 10rpx; border-bottom:2rpx solid rgb(255, 255, 255);}.person_box{ position: relative;}.phone_select{ margin-top:0; z-index: 100; position: absolute; //小程序中z-index和absolute需要同時存在，元素才能脫離文檔。}.select_one{ text-align: center; background-color:rgb(239, 239, 239); width:676rpx; //脫離文檔后元素width不能再用百分比。 height:100rpx; line-height:100rpx; margin:0 5%; border-bottom:2rpx solid rgb(255, 255, 255);}.personal_image{ z-index: 100; position: absolute; right:2.5%; width: 34rpx; height: 20rpx; margin:40rpx 20rpx 40rpx 0; transition: All 0.4s ease;  -webkit-transition: All 0.4s ease;}.rotateRight{ transform: rotate(180deg); //180°旋轉圖片。}