element UI 组件默认传参和自定义传参的解决方法

如下代码

        <div v-for="(item,index) in object.cooperationDepartmentNumber">
          <div class="entrustingPartyList">
            <el-row>
              <el-col :span="12"> 
                <el-form-item label="协办单位">
                <el-autocomplete
                  class="inline-input"
                  v-model="object.cooperationDepartment.otherArray[index].unit"
                  :fetch-suggestions="unitQuerySearch"
                  placeholder="请输入协办单位"
                  :trigger-on-focus="false"
                  @select="unitHandleSelect"
                ></el-autocomplete>
                </el-form-item>
              </el-col>
              <el-col :span="12"> 
                <el-form-item label="协办部门" v-show="interior">
                  <el-input v-model="object.cooperationDepartment.otherArray[index].cooperation" placeholder="协办部门"></el-input>
                </el-form-item>
              </el-col>
              <el-col :span="12"> 
                <el-form-item label="协办单位联系人" v-show="external">
                  <el-input v-model="object.cooperationDepartment.otherArray[index].cooperation" placeholder="协办部门"></el-input>
                </el-form-item>
              </el-col>
            </el-row>
          </div>
        </div>

当我们v-for有很多个相同的组件时，我们需要知道选中的是第几个组件,那么我们肯定想要知道对应的[index],你会想到下面这样[item]是默认的值

	  <el-col :span="12"> 
	    <el-form-item label="协办单位">
	    <el-autocomplete
	      class="inline-input"
	      v-model="object.cooperationDepartment.otherArray[index].unit"
	      :fetch-suggestions="unitQuerySearch"
	      placeholder="请输入协办单位"
	      :trigger-on-focus="false"
	      @select="unitHandleSelect(item, index)"
	    ></el-autocomplete>
	    </el-form-item>
	  </el-col>

解决办法是写个闭包，这样index就表示你的第几个组件

	  <el-col :span="12"> 
	    <el-form-item label="协办单位">
	    <el-autocomplete
	      class="inline-input"
	      v-model="object.cooperationDepartment.otherArray[index].unit"
	      :fetch-suggestions="unitQuerySearch"
	      placeholder="请输入协办单位"
	      :trigger-on-focus="false"
	      @select="((item)=>{unitHandleSelect(item, index)})"
	    ></el-autocomplete>
	    </el-form-item>
	  </el-col>

这样你在调用这个方法的时候就可以知道是第几个组件对应的了，然后就可以对那个组件进行操作了。