实现该功能主要用到mintUI中的Picker与Popup组件
1、引入组件

  import { MessageBox, Toast, Picker, Popup, Header  } from "mint-ui";

2、写弹框选择器的结构样式

         <mt-popup v-model="popupVisible1" popup-transition="popup-fade" closeOnClickModal="true" position="bottom">
           <mt-picker :slots="slots1" @change="onValuesChange1"  showToolbar>
             <div class="picker-toolbar-title">
               <div class="usi-btn-cancel" @click="popupVisible1 = !popupVisible1">取消</div>
               <div class="">请选择售后类型</div>
               <div class="usi-btn-sure" @click="sure1()">确定</div>
             </div>
           </mt-picker>
        </mt-popup>

.picker-toolbar-title {
display: flex;
flex-direction: row;
justify-content: space-around;
align-items: center;
height: 100%;
line-height: 100%;
font-size: .7rem;
  .usi-btn-cancel,.usi-btn-sure{
      color:#FF6600;
  }  
}

3、在method中写选中值的方法

methods: {
onValuesChange1(picker, values) {
      this.message = values[0];
},
sure1(){
this.saleType = this.message  
this.popupVisible1 = false; 
},
  
    },

4、大功告成，最后的效果图如下