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vue使用动态组件实现TAB切换效果完整实例

福牛 5月 13, 2023 22 0

一、方法1：使用Vant组件库的tab组件

Vant 2 – Mobile UI Components built on vue

-1

二、 方法2：手动创建tab切换效果

-2

-3

1.在components文件夹下创建切换的.vue页面、引入使用

  1. import one from “./components/one”;
  2. import two from “./components/two”;
  3. import three from “./components/three”;
  4. import four from “./components/four”;
  5. components: {
  6.      one,
  7.      two,
  8.      three,
  9.      four,
  10. },

2.布局：上面放tab点击的标签，下面放组件呈现对应内容

  1. // 然后使用v-for循环出来呈现
  2. <template>
  3.      <div id=“app”>
  4.          <div class=“top”>
  5.          <!– 放置tab点击标签 –>
  6.              <div class=“crad”
  7.              :class=“{ highLight: whichIndex == index }”
  8.              v–for=“(item, index) in cardArr”
  9.              :key=“index”
  10.              @click=“whichIndex = index”>
  11.              {{ item.componentName }}
  12.          </div>
  13.          </div>
  14.          <div class=“bottom”>
  15.          <!– 放置动态组件… –>
  16.          <!– keep–alive缓存组件，这样的话，组件就不会被销毁，DOM就不会被重新渲染，
  17.          浏览器也就不会回流和重绘，就可以优化性能。不使用的话页面加载就会慢一点 –>
  18.          <keep–alive>
  19.          <component :is=“componentId”></component>
  20.          </keep–alive>
  21.          </div>
  22.      </div>
  23. </template>

3.写好上面的tab点击标签，定义数据修改样式

  1. // 首先我们在data中定义数组cardArr存放点击tab的数据
  2. data() {
  3.      return {
  4.          whichIndex: 0,
  5.          cardArr: [
  6.          {
  7.              componentName: “动态组件一”,
  8.              componentId: “one”,
  9.          },{
  10.              componentName: “动态组件二”,
  11.              componentId: “two”,
  12.          },{
  13.              componentName: “动态组件三”,
  14.              componentId: “three”,
  15.          },{
  16.              componentName: “动态组件四”,
  17.              componentId: “four”,
  18.          },
  19.          ],
  20.      };
  21. },
  1. // 又因为需要有高亮状态样式：默认索引0高亮
  2. .highLight {
  3.      box–shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
  4.      transform: translate3d(0, –1px, 0);
  5. }

三、完整代码

  1. <template>
  2.      <div id=“app”>
  3.      <div class=“top”>
  4.          <div
  5.          class=“crad”
  6.          :class=“{ highLight: whichIndex == index }”
  7.          v-for=“(item, index) in cardArr”
  8.          :key=“index”
  9.          @click=“
  10.              whichIndex = index;
  11.              componentId = item.componentId;
  12.          “
  13.          >
  14.          {{ item.componentName }}
  15.          </div>
  16.      </div>
  17.      <div class=“bottom”>
  18.          <keep-alive>
  19.          <component :is=“componentId”></component>
  20.          </keep-alive>
  21.      </div>
  22.      </div>
  23. </template>
  24. <script>
  25. import one from “./components/one”;
  26. import two from “./components/two”;
  27. import three from “./components/three”;
  28. import four from “./components/four”;
  29. export default {
  30.      components: {
  31.      one,
  32.      two,
  33.      three,
  34.      four,
  35.      },
  36.      data() {
  37.      return {
  38.          whichIndex: 0,
  39.          componentId: “one”,
  40.          cardArr: [
  41.          {
  42.              componentName: “动态组件一”,
  43.              componentId: “one”,
  44.          },
  45.          {
  46.              componentName: “动态组件二”,
  47.              componentId: “two”,
  48.          },
  49.          {
  50.              componentName: “动态组件三”,
  51.              componentId: “three”,
  52.          },
  53.          {
  54.              componentName: “动态组件四”,
  55.              componentId: “four”,
  56.          },
  57.          ],
  58.      };
  59.      },
  60. };
  61. </script>
  62. <style lang=“less” scoped>
  63. #app {
  64.      width: 100%;
  65.      height: 100vh;
  66.      box–sizing: border–box;
  67.      padding: 50px;
  68.      .top {
  69.      width: 100%;
  70.      height: 80px;
  71.      display: Flex;
  72.      justify–content: space–around;
  73.      .crad {
  74.          width: 20%;
  75.          height: 80px;
  76.          line–height: 80px;
  77.          text–align: center;
  78.          background–color: #fff;
  79.          border: 1px solid #e9e9e9;
  80.      }
  81.      .highLight {
  82.          box–shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
  83.          transform: translate3d(0, –1px, 0);
  84.      }
  85.      }
  86.      .bottom {
  87.      margin–top: 20px;
  88.      width: 100%;
  89.      height: calc(100% – 100px);
  90.      border: 3px solid pink;
  91.      display: flex;
  92.      justify–content: center;
  93.      align–items: center;
  94.      }
  95. }
  96. </style>

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