Vue css js 多行多列实现需求

solate

修改于 2023-09-24 19:54:49

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修改于 2023-09-24 19:54:49

文章被收录于专栏：solate 杂货铺solate 杂货铺

需求

需要实现一个循环来循环元素，每行4个元素

css flex

CSS flex实现多行多列的多种方式

vue v-for实现多行等分布局-三等分

<template>
  <div >
<!--    <div v-for="item in dataList" class="parent">-->
<!--      <div class="child">{{item.id }}</div>-->
<!--    </div>-->

    <h3><pre><span>1.flex合并属性 </span><span>flex: 1 0 50%;</span></pre></h3>
    <section class="flex-outer flex-attr">
      <article>1</article>
      <article>2</article>
      <article>3</article>
      <article>4</article>
    </section>

    <h3><pre><span>2.基准属性</span><span>flex-basis: 50%;</span></pre></h3>
    <section class="flex-outer flex-basis">
      <article>1</article>
      <article>2</article>
      <article>3</article>
      <article>4</article>
    </section>

    <h3><pre><span>3.设置width</span><span>width: 50%;</span></pre></h3>
    <section class="flex-outer width-attr">
      <article>1</article>
      <article>2</article>
      <article>3</article>
      <article>4</article>
    </section>
  </div>
</template>

<script>
export default {
  data () {
    return {
      dataList: [
        { id: 1, name: 'F1' },
        { id: 2, name: 'F2' },
        { id: 3, name: 'F3' },
        { id: 4, name: 'F4' },
        { id: 5, name: 'F5' },
        { id: 6, name: 'F6' },
        { id: 7, name: 'F6' },
      ]
    }
  },
}
</script>

<style scoped>

.flex-outer {
  display: flex;
  flex-wrap: wrap;
}

.flex-outer article {
  background: limegreen;
  border: 1px solid #eee;
  box-sizing: border-box;
  color: #fff;
  padding: 15px;
}

/* flex合并属性 */
.flex-outer.flex-attr article  {
  flex: 1 0 50%;
}

/* flex-basis */
.flex-outer.flex-basis article {
  flex-basis: 50%;
}

/* 设置width */
.flex-outer.width-attr article {
  width: 50%;
}

pre {
  display: flex;
  justify-content: space-between;
}
</style>

自己实现

<template>
  <div>
    <div class="wrapper">
      <div class="wrapper-content" v-for="item in dataList">
        <span>{{item.id}}</span>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Test',
  data () {
    return {
      dataList: [
        { id: 1, name: 'F1' },
        { id: 2, name: 'F2' },
        { id: 3, name: 'F3' },
        { id: 4, name: 'F4' },
        { id: 5, name: 'F5' },
        { id: 6, name: 'F6' },
        { id: 7, name: 'F6' },
      ]
    }
  },
}
</script>

<style scoped>

.wrapper{
  width: 100%;
  height: auto;
  display: flex;
  justify-content: space-between;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: left;
}
.wrapper-content{
  width: 33%;
}


</style>

有些说css控制有时候不起作用，那么就需要js来控制

js 实现

VUE的for循环一行两列

vue+elementui 实现每行两列循环

<template>
  <div >
    <div v-for='(item,index) in dataList' v-if='index%2==0'>
      <tr >
        <td style="width: 50px; background: red">
          {{item.id}}
        </td>
        <td v-if='index+1<dataList.length'>
          {{dataList[index+1].id}}
        </td>
      </tr>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      dataList: [
        { id: 1, name: 'F1' },
        { id: 2, name: 'F2' },
        { id: 3, name: 'F3' },
        { id: 4, name: 'F4' },
        { id: 5, name: 'F5' },
        { id: 6, name: 'F6' },
        { id: 7, name: 'F6' },
      ]
    }
  },
}
</script>

<style scoped>

</style>

这种方式虽然可以实现数据换行，但是要写很多逻辑，而且要算好下标，感觉也不是很好

将一维数据转换成二维数组

vue v-for list数据循环每3或者（n）个一组

<template>
  <div >
    <div class="wrapper" v-for="(item) in computedList">
      <div class="wrapper-content" v-for="(cell, i) in item" :key="i">
        <div class="flex-outer" style="width: 25%">{{cell.id}}</div>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Test',
  data () {
    return {
      dataList: [
        { id: 1, name: 'F1' },
        { id: 2, name: 'F2' },
        { id: 3, name: 'F3' },
        { id: 4, name: 'F4' },
        { id: 5, name: 'F5' },
        { id: 6, name: 'F6' },
        { id: 7, name: 'F6' },
      ]
    }
  },
  computed: {
    computedList() {
      let index = 0;
      let num = 4; // 每行几个元素
      let arr = [];
      for (let i=0; i<this.dataList.length; i++) {
        index = parseInt(i/num);
        if (arr.length <= index) {
          arr.push([]);
        }
        arr[index][i%num] = this.dataList[i];
      }
      console.log(arr)
      return arr;
    }

  },
}
</script>

<style scoped>

.wrapper{
  width: 100%;
  height: auto;
  display: flex;
  justify-content: space-between;
  flex-direction: row;
  flex-wrap: wrap;
}
.wrapper-content{
  width: 33%;
}


</style>

这个一维数组转换二位数组算法可以优化，后续补充

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