vue前端实现分页

实现分页的基本思路

在Vue中实现分页功能通常需要结合后端API返回的分页数据，前端负责渲染分页控件并处理用户交互。分页组件通常包括页码按钮、上一页/下一页按钮以及总页数显示等元素。

分页组件代码示例

<template>
  <div class="pagination">
    <button @click="prevPage" :disabled="currentPage === 1">上一页</button>
    <span v-for="page in pages" :key="page">
      <button 
        @click="changePage(page)"
        :class="{ active: currentPage === page }"
      >
        {{ page }}
      </button>
    </span>
    <button @click="nextPage" :disabled="currentPage === totalPages">下一页</button>
  </div>
</template>

<script>
export default {
  props: {
    totalItems: {
      type: Number,
      required: true
    },
    itemsPerPage: {
      type: Number,
      default: 10
    },
    currentPage: {
      type: Number,
      default: 1
    }
  },
  computed: {
    totalPages() {
      return Math.ceil(this.totalItems / this.itemsPerPage)
    },
    pages() {
      const range = []
      for (let i = 1; i <= this.totalPages; i++) {
        range.push(i)
      }
      return range
    }
  },
  methods: {
    changePage(page) {
      this.$emit('page-changed', page)
    },
    prevPage() {
      if (this.currentPage > 1) {
        this.changePage(this.currentPage - 1)
      }
    },
    nextPage() {
      if (this.currentPage < this.totalPages) {
        this.changePage(this.currentPage + 1)
      }
    }
  }
}
</script>

<style>
.pagination {
  display: flex;
  justify-content: center;
  margin-top: 20px;
}
.pagination button {
  margin: 0 5px;
  padding: 5px 10px;
}
.pagination button.active {
  background-color: #42b983;
  color: white;
}
</style>

使用分页组件

在父组件中使用分页组件并处理分页事件：

<template>
  <div>
    <!-- 数据列表 -->
    <ul>
      <li v-for="item in paginatedData" :key="item.id">
        {{ item.name }}
      </li>
    </ul>

    <!-- 分页组件 -->
    <Pagination
      :total-items="totalItems"
      :items-per-page="itemsPerPage"
      :current-page="currentPage"
      @page-changed="handlePageChange"
    />
  </div>
</template>

<script>
import Pagination from './Pagination.vue'

export default {
  components: {
    Pagination
  },
  data() {
    return {
      items: [], // 从API获取的所有数据
      currentPage: 1,
      itemsPerPage: 10
    }
  },
  computed: {
    totalItems() {
      return this.items.length
    },
    paginatedData() {
      const start = (this.currentPage - 1) * this.itemsPerPage
      const end = start + this.itemsPerPage
      return this.items.slice(start, end)
    }
  },
  methods: {
    handlePageChange(page) {
      this.currentPage = page
    }
  }
}
</script>

优化分页显示

对于大量数据的分页，可以考虑只显示当前页附近的页码：

computed: {
  pages() {
    const range = []
    const visiblePages = 5 // 显示的最大页码数
    let start = Math.max(1, this.currentPage - Math.floor(visiblePages / 2))
    let end = Math.min(this.totalPages, start + visiblePages - 1)

    if (end - start + 1 < visiblePages) {
      start = Math.max(1, end - visiblePages + 1)
    }

    for (let i = start; i <= end; i++) {
      range.push(i)
    }

    return range
  }
}

与后端API交互

实际项目中通常需要与后端API配合实现分页：

methods: {
  async fetchData(page = 1) {
    try {
      const response = await axios.get('/api/items', {
        params: {
          page,
          limit: this.itemsPerPage
        }
      })
      this.items = response.data.items
      this.totalItems = response.data.total
    } catch (error) {
      console.error(error)
    }
  },
  handlePageChange(page) {
    this.currentPage = page
    this.fetchData(page)
  }
}

分页样式优化

可以添加更多样式增强用户体验：

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 20px 0;
}

.pagination button {
  margin: 0 4px;
  padding: 6px 12px;
  border: 1px solid #ddd;
  background: #fff;
  cursor: pointer;
  border-radius: 4px;
}

.pagination button:hover:not(:disabled) {
  background: #f5f5f5;
}

.pagination button.active {
  background: #42b983;
  color: white;
  border-color: #42b983;
}

.pagination button:disabled {
  color: #ccc;
  cursor: not-allowed;
}