vue 分页的实现

分页组件实现

使用Vue实现分页功能通常需要结合后端API和前端组件。以下是一种常见的实现方式：

模板部分

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

脚本部分

<script>
export default {
  props: {
    totalItems: {
      type: Number,
      required: true
    },
    itemsPerPage: {
      type: Number,
      default: 10
    },
    currentPage: {
      type: Number,
      default: 1
    },
    maxVisibleButtons: {
      type: Number,
      default: 5
    }
  },
  computed: {
    totalPages() {
      return Math.ceil(this.totalItems / this.itemsPerPage)
    },
    pageRange() {
      const range = []
      const half = Math.floor(this.maxVisibleButtons / 2)
      let start = Math.max(1, this.currentPage - half)
      let end = Math.min(this.totalPages, start + this.maxVisibleButtons - 1)

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

      for (let i = start; i <= end; i++) {
        range.push(i)
      }
      return range
    }
  },
  methods: {
    prevPage() {
      if (this.currentPage > 1) {
        this.$emit('page-changed', this.currentPage - 1)
      }
    },
    nextPage() {
      if (this.currentPage < this.totalPages) {
        this.$emit('page-changed', this.currentPage + 1)
      }
    },
    goToPage(page) {
      this.$emit('page-changed', page)
    }
  }
}
</script>

样式部分

<style scoped>
.pagination {
  display: flex;
  justify-content: center;
  margin-top: 20px;
}

.pagination button {
  margin: 0 5px;
  padding: 5px 10px;
  border: 1px solid #ddd;
  background: #fff;
  cursor: pointer;
}

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

.pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
</style>

使用示例

<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="data.length"
      :items-per-page="perPage"
      :current-page="currentPage"
      @page-changed="changePage"
    />
  </div>
</template>

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

export default {
  components: { Pagination },
  data() {
    return {
      data: [], // 从API获取的数据
      perPage: 10,
      currentPage: 1
    }
  },
  computed: {
    paginatedData() {
      const start = (this.currentPage - 1) * this.perPage
      const end = start + this.perPage
      return this.data.slice(start, end)
    }
  },
  methods: {
    changePage(page) {
      this.currentPage = page
      // 可以在这里调用API获取新页面的数据
    }
  }
}
</script>

与后端API配合

当数据量很大时，通常需要后端分页：

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

分页功能优化

显示总页数和当前页信息：

<div class="pagination-info">
  第 {{ currentPage }} 页 / 共 {{ totalPages }} 页 ({{ totalItems }} 条记录)
</div>

添加跳转输入框：

<input 
  type="number" 
  v-model.number="inputPage" 
  min="1" 
  :max="totalPages"
  @keyup.enter="goToInputPage"
>
<button @click="goToInputPage">跳转</button>

data() {
  return {
    inputPage: 1
  }
},
methods: {
  goToInputPage() {
    const page = Math.max(1, Math.min(this.inputPage, this.totalPages))
    this.$emit('page-changed', page)
    this.inputPage = page
  }
}