Vue之el-select结合v-if动态控制template显示隐藏的方法是什么

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el-select结合v-if动态控制template显示隐藏

背景： 根据（取值方式）select框中当选择项：

• 1：范围匹配的时候，（取值）显示两个输入框（上线，下线）；

• 2：精确匹配的时候，（取值）显示一个输入框（精确）

代码实现

<el-table-column label="取值方式" min-width="100" align="center">
    <template scope="scope">
        <el-select v-model="scope.row.extractMode" clearable placeholder="请选择">
            <el-option v-for="item in extractModeList" :key="item.value" :label="item.label" :value="item.value"></el-option>
        </el-select>
    </template>
    </el-table-column>
    <el-table-column label="取值" min-width="300" align="center">
    <template scope="scope"> <!-- v-if="!showExactMactchInput0" -->
        <div v-if="scope.row.extractMode== 'range' || scope.row.extractMode== 'fuzzy'"><!--  -->
            <el-input size="small" class="limitTable" type="number" v-model="scope.row.lowerLimit" placeholder="请输入下限内容"></el-input>
            -
            <el-input size="small" class="limitTable" type="number" v-model="scope.row.upperLimit" placeholder="请输入上线内容"></el-input>
        </div>
        <div v-else-if="scope.row.extractMode== 'exacts' || scope.row.extractMode== 'exclude' " > <!-- v-bind:id="'exactlist-' + scope.$index" ref="'exactlist-' + scope.$index" -->
            <el-input size="small" class="exactTable2" v-model="scope.row.exactMatch" placeholder="请输入精确内容"></el-input>
        </div>
    </template>
    </el-table-column>
    <el-table-column label="操作" align="center">
    <template slot-scope="scope">
        <el-button circle type="success" icon="el-icon-circle-plus" @click="handleLabelRowClone(scope.$index, scope.row)"></el-button>
        <el-button type="danger" icon="el-icon-remove" circle @click="handleLabelRowDelete(scope.$index, scope.row)"></el-button>
    </template>
</el-table-column>

贴图 

ps: 由于更入手vue，很多语法没仔细看文档，导致入坑不少；很多很简单的语法会耽搁时间；切记切记。

(坑：1：原本想用scope.$index[下标]作为标识从而v-if判断；经过实验变量无法进行赋值（弃之）

2：用v-bind:id【scope.$index】 进行dom控制style.display;考虑到vue本身仅关注视图层；方式不优好。（弃之）

3：恍惚间，每一行都独立不就是【scope.$index】【scope.row】是同样的；这样也不用监听v-select的change event。(用之)

v-if/else template任务状态{1,2,3};当完成==3时，跳转ftp：//

 <el-table-column label="任务状态" prop="taskStatus">
    <template slot-scope="scope">
	<span v-if="scope.row.taskStatus=='3'" class="c-click" @click="hrefFtpUrl(scope.row)">            {{statusObj[scope.row.taskStatus] + scope.row.exportUrl}}</span>
    <span v-else >{{statusObj[scope.row.taskStatus]}}</span>
    </template>
		</el-table-column>

Vue动态控制表格列的显示隐藏

效果

如上图所示，点击table右上方的表格按钮，弹出菜单栏，进行勾选，从而达到表格对应列显示和隐藏

代码

1.HTML部分

<template>
  <div id="app">
    <el-table :data="tableData" border  ref="table">
      <el-table-column
        fixed
        prop="date"
        label="日期"
        width="150"
        v-if="showColumn.date"
      >
      </el-table-column>
      <el-table-column
        prop="name"
        label="姓名"
        width="120"
        v-if="showColumn.name"
      >
      </el-table-column>
      <el-table-column
        prop="province"
        label="省份"
        width="120"
        v-if="showColumn.provinces"
      >
      </el-table-column>
      <el-table-column
        prop="city"
        label="市区"
        width="120"
        v-if="showColumn.city"
      >
      </el-table-column>
      <el-table-column
        prop="address"
        label="地址"
        width="300"
        v-if="showColumn.adreess"
      >
      </el-table-column>
      <el-table-column
        prop="zip"
        label="邮编"
        width="120"
        v-if="showColumn.zipCode"
      >
      </el-table-column>
      <el-table-column fixed="right" width="100" align="center">
        <template slot="header">
          <i
            class="el-icon-setting"
            
            @click="showColumnOption"
          ></i>
        </template>
        <template slot-scope="scope">
          <el-button @click="handleClick(scope.row)" type="text" size="small"
            >查看</el-button
          >
          <el-button type="text" size="small">编辑</el-button>
        </template>
      </el-table-column>
    </el-table>
    <!-- 配置列面板 -->
    <transition name="fade">
      <div class="columnOption" v-show="isShowColumn">
        <div class="content">
          <div class="head">选择显示字段</div>
          <div class="body">
            <el-checkbox v-model="checkList.date" disabled>日期</el-checkbox>
            <el-checkbox v-model="checkList.name">姓名</el-checkbox>
            <el-checkbox v-model="checkList.provinces">省份</el-checkbox>
            <el-checkbox v-model="checkList.city">市区</el-checkbox>
            <el-checkbox v-model="checkList.adreess">地址</el-checkbox>
            <el-checkbox v-model="checkList.zipCode">邮编</el-checkbox>
          </div>
          <div class="footer">
            <el-button size="small" type="primary" plain @click="saveColumn"
              >保存列配置</el-button
            >
          </div>
        </div>
      </div>
    </transition>
  </div>
</template>

通过 v-if="showColumn.date" 来判断表格对应列的状态

2.javascript部分

<script>
export default {
  data() {
    return {
      isShowColumn: false,
      tableData: [
        {
          date: "2016-05-02",
          name: "王小虎",
          province: "上海",
          city: "普陀区",
          address: "上海市普陀区金沙江路 1518 弄",
          zip: 200333,
        },
        {
          date: "2016-05-04",
          name: "王小虎",
          province: "上海",
          city: "普陀区",
          address: "上海市普陀区金沙江路 1517 弄",
          zip: 200333,
        },
        {
          date: "2016-05-01",
          name: "王小虎",
          province: "上海",
          city: "普陀区",
          address: "上海市普陀区金沙江路 1519 弄",
          zip: 200333,
        },
        {
          date: "2016-05-03",
          name: "王小虎",
          province: "上海",
          city: "普陀区",
          address: "上海市普陀区金沙江路 1516 弄",
          zip: 200333,
        },
      ],
      // 列的配置化对象，存储配置信息
      checkList: {},
      showColumn: {
        date: true,
        name: true,
        provinces: true,
        city: true,
        adreess: true,
        zipCode: true,
      },
    };
  },
  watch: {
    // 监听复选框配置列所有的变化
    checkList: {
      handler: function (newnew, oldold) {
        // console.log(newnew); 
        this.showColumn = newnew;
        // 这里需要让表格重新绘制一下，否则会产生固定列错位的情况
        this.$nextTick(() => {
          this.$refs.table.doLayout();
        });
      },
      deep: true,
      immediate: true
    },
  },
  mounted() {
    // 发请求得到checkListInitData的列的名字
    if(localStorage.getItem("columnSet")){
      this.checkList = JSON.parse(localStorage.getItem("columnSet"))
    }else{
      this.checkList = {
        date: true,
        name: true,
        provinces: true,
        city: true,
        adreess: true,
        zipCode: true,
      };
    }
  },
  methods: {
    handleClick(row) {
      console.log(row);
    },
    showColumnOption() {
      this.isShowColumn = true;
    },
    saveColumn() {
      localStorage.setItem("columnSet",JSON.stringify(this.checkList))
      this.isShowColumn = false;
    },
  },
};
</script>

3.css样式部分

.columnOption {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: row-reverse;
  .content {
    width: 100px;
    height: 100%;
    background-color: rgb(203, 223, 198);
    .head {
      width: 100%;
      height: 44px;
      border-bottom: 1px solid #000;
      display: flex;
      justify-content: center;
      align-items: center;
      font-size: 12px;
    }
    .body {
      width: 100%;
      height: calc(100% - 88px);
      box-sizing: border-box;
      padding-top: 10px;
      overflow-y: auto;
      .items {
        width: 100%;
        height: 100%;
        overflow-y: auto;
        display: flex;
        flex-direction: column;
        .el-checkbox {
          width: 100%;
          height: 28px;
          line-height: 28px;
          margin-bottom: 14px;
          display: inline-block;
          font-family: PingFang SC;
          font-style: normal;
          font-weight: normal;
          font-size: 14px;
          color: #000;
          overflow: hidden;
          text-overflow: ellipsis;
          white-space: nowrap;
          box-sizing: border-box;
          padding-left: 14px;
        }
        .el-checkbox:hover {
          background-color: #f5f7fa;
        }
      }
    }
    .footer {
      width: 100%;
      height: 44px;
      border-top: 1px solid #000;
      display: flex;
      justify-content: center;
      align-items: center;
    }
  }
}
// 控制淡入淡出效果
.fade-enter-active,
.fade-leave-active {
  transition: opacity 0.3s;
}
.fade-enter,
.fade-leave-to {
  opacity: 0;
}

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