<input
  class="input-class"
  type="text"
  v-model="value"
  placeholder-class="placeholder-class"
  placeholder="请输入"
/>

<picker
  @change="handleChange"
  :value="index"
  range-key="label"
  :range="options"
>
  <view>{{ options[index]?.label }}</view>
</picker>

{
    data(){
        return {
            index: 0,

            options: [
              {
                value: 1,
                label: '顺丰',
              },
              {
                value: 2,
                label: '圆通',
              },
            ]
        }
    },

    methods: {
        handleChange(e) {
            this.index = e.detail.value
        }
    }
}