V-for單擊所有按鈕，而不只是一個

Question

我是Vue.js的新手。 我正在嘗試基於數組從v-for（正確渲染）渲染復選框。

然后，我嘗試在每個復選框旁邊呈現一個按鈕，該按鈕將基於所選索引打開多選。 但是，每當我單擊渲染按鈕時，它都會打開所有復選框按鈕的多重選擇。

HTML：

<div>
  <label class='label'>countrys:* </label><br><br>
  <div 
    v-for="(country, index) in countries" 
    class="label" 
    style="display: inline-block;">
    <input 
      type='checkbox' 
      value="country">&nbsp
    {{country.geos}} &nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp
    <img 
      class='addIcon' 
      v-bind="country" 
      :key="country.index" 
      style="width: 26px;height: 20px;margin-right: 8px;margin-top: px;margin-left: -25px;margin-bottom:-5px"
      src='../../images/createScreen/addClient@2x.png' 
      @click="makeMarketsActive($event, index)">
    <select multiple v-if="!isHidden">
      <option 
        v-for="(market) in country.markets" 
        v-bind="country">
        {{ market }}
      </option>
    </select>
  </div>
</div>

JS：

export default {
  name: "Update",
  components: {
  },
  data() {
    return {    
      countries:[
        {
          "index":0,
          "geos":"America",
          "markets":['a','b','c','d']
        },
        {
          "index":1,
          "geos":"Canada",
          "markets":['a','b']
         },
           "index":2,
           "geos":"Africa",
           "markets":['x','z']
         }
      ],
      isHidden:true
    }
  },
  makeMarketsActive(event, index) {
    this.isHidden = !this.isHidden;
  }

預期結果：單擊為每個復選框渲染的圖像時，我只想查看每個地理位置而不是全部的市場。

Answer 1

您也不需要額外的功能

HTML

<div id="app">

  <label class='label'>countries:* </label><br><br>
  <div v-for="(country, index) in countries" class="label" style="display: inline-block;">
    <input type='checkbox' value="country">{{country.geos}}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

    <img class='addIcon' v-bind="country" :key="country.index" style="margin-right: 8px;margin-top: px;margin-left: -25px;margin-bottom:-5px" src='https://via.placeholder.com/26x20' v-on:click="country.isVisible = !country.isVisible">
    <select multiple v-show="country.isVisible">
       <option v-for="(market) in country.markets" v-bind="country" >{{ market }}</option>
    </select>
  </div>

</div>

JS

new Vue({
  el: '#app',
  data: {
    countries: [{
        "index": 0,
        "geos": "America",
        "markets": ['a', 'b', 'c', 'd'],
        "isVisible": false
      },
      {
        "index": 1,
        "geos": "Canada",
        "markets": ['a', 'b'],
        "isVisible": false
      }, {
        "index": 2,
        "geos": "Africa",
        "markets": ['x', 'z'],
        "isVisible": false
      }
    ]
  }
})

Answer 2

首先，如注釋中所述，您正在通過常規屬性isHidden處理每個按鈕狀態。 因此，您需要將此屬性添加到數據數組：

 new Vue({ el: "#app", data: { countries:[ { "index":0, "geos":"America", "markets":['a','b','c','d'], "isHidden":true }, { "index":1, "geos":"Canada", "markets":['a','b'], "isHidden":true }, {"index":2, "geos":"Africa", "markets":['x','z'], "isHidden":true } ] }, methods: { makeMarketsActive(event, index) { this.countries[index].isHidden = !this.countries[index].isHidden; } } }) 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script> <div id="app"> <label class='label'>countrys:* </label><br><br> <div v-for="(country, index) in countries" class="label" style="display: inline-block;"> <input type='checkbox' value="country">&nbsp{{country.geos}} &nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp <img class='addIcon' v-bind="country" :key="country.index" style="width: 26px;height: 20px;margin-right: 8px;margin-top: px;margin-left: -25px;margin-bottom:-5px" src='../../images/createScreen/addClient@2x.png' @click="makeMarketsActive($event, index)"> <select multiple v-if="!country.isHidden"> <option v-for="(market) in country.markets" v-bind="country" > {{ market }} </option> </select> </div> </div>