Ant Design Vue 的 Collapse 折叠面板如何一键展开所有？

Question

需求：a-collapse 可以一键展开所有

使用 javascript+vue3+Ant Design Vue 下了下面的代码：

<template>
  <div>
    <a-button @click="expandAll">展开全部</a-button>
    <a-collapse ref="collapse">
      <a-collapse-panel
        v-for="(category, index) in categories"
        :key="index"
        :header="category.name"
      >
        <a-table
          :columns="columns"
          :data-source="category.data"
          :pagination="false"
        ></a-table>
      </a-collapse-panel>
    </a-collapse>
  </div>
</template>

<script>
import { defineComponent } from "vue";
import { Collapse, CollapsePanel, Table, Button } from "ant-design-vue";
import axios from "axios";

export default defineComponent({
  components: {
    Collapse,
    CollapsePanel,
    Table,
    Button,
  },
  data() {
    return {
      columns: [
        {
          title: "track_source_id",
          dataIndex: "track_source_id",
          key: "track_source_id",
        },
        {
          title: "clip_source",
          dataIndex: "clip_source",
          key: "clip_source",
        },
        {
          title: "domain_name",
          dataIndex: "domain_name",
          key: "domain_name",
        },
        {
          title: "host_url",
          dataIndex: "host_url",
          key: "host_url",
        },
        {
          title: "description",
          dataIndex: "description",
          key: "description",
        },
      ],
      categories: [
        {
          name: "website",
          data: [],
        },
        {
          name: "image",
          data: [],
        },
        {
          name: "image_search_engine",
          data: [],
        },
        {
          name: "news",
          data: [],
        },
        {
          name: "image_uri",
          data: [],
        },
        {
          name: "novel",
          data: [],
        },
      ],
    };
  },
  mounted() {
    // 使用axios或其他方法从后端接口获取数据，并将其赋值给各个类别的data属性
    // 以下代码仅作为示例，你需要根据实际情况进行修改
    axios
      .get("http://xxxx.cn/list_all_search_engine")
      .then((response) => {
        const data = response.data;
        this.categories[0].data = data.website;
        this.categories[1].data = data.image;
        this.categories[2].data = data.image_search_engine;
        this.categories[3].data = data.news;
        this.categories[4].data = data.image_uri;
        this.categories[5].data = data.novel;
      })
      .catch((error) => {
        console.error(error);
      });
  },
  methods: {
    expandAll() {
      const panels = this.$refs.collapse.getPanels();
      panels.forEach((panel) => {
        panel.isActive = true;
      });
    },
  },
});
</script>

点击"展开全部"之后就报错了：

ERROR
this.$refs.collapse.getPanels is not a function
expandAll@webpack-internal:///./node_modules/babel-loader/lib/index.js??clonedRuleSet-40.use[0]!./node_modules/vue-loader/dist/index.js??ruleSet[0].use[0]!./src/components/ListCrawlerEngine.vue?vue&type=script&lang=js:79:42
callWithErrorHandling@webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:287:18
callWithAsyncErrorHandling@webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:295:38
emit@webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:810:31
get emit/<@webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:7286:45
handleClick@webpack-internal:///./node_modules/ant-design-vue/es/button/button.js:118:11
callWithErrorHandling@webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:287:18
callWithAsyncErrorHandling@webpack-internal:///./node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js:295:38
invoker@webpack-internal:///./node_modules/@vue/runtime-dom/dist/runtime-dom.esm-bundler.js:473:82

Answer 1

试试这样：

<template>
  <div>
    <a-button @click="expandAll">展开全部</a-button>
    <a-collapse v-model="activeKeys">
      <a-collapse-panel
        v-for="(category, index) in categories"
        :key="index"
        :header="category.name"
      >
        <a-table
          :columns="columns"
          :data-source="category.data"
          :pagination="false"
        ></a-table>
      </a-collapse-panel>
    </a-collapse>
  </div>
</template>

<script>
import { defineComponent } from "vue";
import { Collapse, CollapsePanel, Table, Button } from "ant-design-vue";
import axios from "axios";

export default defineComponent({
  components: {
    Collapse,
    CollapsePanel,
    Table,
    Button,
  },
  data() {
    return {
      activeKeys: [], 
    
    };
  },
  methods: {
    expandAll() {
      this.activeKeys = this.categories.map((_, index) => index);
    },
  },
});
</script>