Vue实现下拉加载更多

转自于:https://www.jb51.net/article/211727.htm(亲测可用)

这里需要后端做分页

1. 使用el-table-infinite-scroll 插件

(1). 安装插件

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npm install --save el-table-infinite-scroll

(2). 全局引入并注册

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// main.js
  
import elTableInfiniteScroll from 'el-table-infinite-scroll';
  
Vue.use(elTableInfiniteScroll);

(3). 局部文件引入

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<script>
// 引入
import elTableInfiniteScroll from 'el-table-infinite-scroll';
export default {
  // 注册指令
  directives: {
    'el-table-infinite-scroll': elTableInfiniteScroll
  }
}
</script>

(4). 使用指令

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<el-table :height="tableHeight" v-el-table-infinite-scroll="loadMore">
  
</el-table>

(5). 代码实例

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<template>
    <div class="app-container">
        <el-table :height="tableHeight" v-el-table-infinite-scroll="loadMore" :data="tableList">
            <!-- 表格数据省略 -->
        </el-table>
    </div>
</template>
  
<script>
// 引入插件
import elTableInfiniteScroll from "el-table-infinite-scroll";
  
export default {
    name: "index",
    data() {
        return {
            // 表格高度
            tableHeight:"",
            // 数据总数
            tableCount:0,
            // 表格数据列表
            tableList:[],
            // 是否加载中
            tableLoading:false,
            // 表格搜索条件
            tableSearch:{
                page:1
            }
        }
    },
    // 注册指令
    directives: {
        "el-table-infinite-scroll": elTableInfiniteScroll,
    },
  
    created() {
        let windowHeight =document.documentElement.clientHeight || document.body.clientHeight;
        // 动态计算表格的高度,200为屏幕内除了表格以外其他元素的高度,依实际情况而定
        this.tableHeight = windowHeight - 200 + "px";
    },
    mounted(){
        this.getTableData(this.tableSearch);
    },
  
    methods: {
        // 请求表格数据
        getTableData(search) {
            let page = search.page;
            let url = "index?page=" + page;
            // 首次打开页面要加载一次数据,为了防止数据过多自动触发滚动,此处需要置为加载中
            this.tableLoading = true;
            this.$http.get(url).then((result) => {
                if (res.code == 10000) {
                    // 拼接数据
                    this.tableList = this.tableList.concat(result.data.list);
                    this.tableCount = result.count;
                    this.tableSearch.page = result.current;
                    this.tableLoading = false;
                }
            });
        },
        // 加载更多
        loadMore() {
            if (!this.tableLoading) {
                this.tableLoading = true;
                if (this.tableList.length < this.tableCount) {
                    this.tableSearch.page++;
                    this.getTableData(this.tableSearch);
                } else {
                    this.$message("已加载完所有的数据!");
                    this.tableLoading = false;
                }
            }
        },
    }
};
</script>

2. 自定义下拉加载方法

上面使用的插件需要依赖Element-UI,如果没有使用Element-UI,那就只能自己写一个下拉加载了,实现代码如下:

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<template>
    <div class="app-container">
        <div :style="{height:tableHeight,overflow:'auto'}" id="tableBox">
            <!-- 表格数据省略 -->
        </div>
    </div>
</template>
  
<script>
export default {
    name: "index",
    data() {
        return {
            // 表格高度
            tableHeight:"",
            // 数据总数
            tableCount:0,
            // 表格数据列表
            tableList:[],
            // 是否加载中
            tableLoading:false,
            // 表格搜索条件
            tableSearch:{
                page:1
            }
        };
    },
    created(){
        let windowHeight = document.documentElement.clientHeight || document.body.clientHeight;
        // 动态计算表格的高度,200为屏幕内除了表格以外其他元素的高度,依实际情况而定
        this.tableHeight = windowHeight - 200 +'px';
    },
    mounted() {
        this.getTableData(this.tableSearch);
        document.getElementById("tableBox").addEventListener('scroll',this.onTableScroll);
    },
  
    beforeDestroy() {
        // 移除监听事件
        window.removeEventListener('scroll', this.onTableScroll)
    },
  
    methods: {
        onTableScroll(){
            var obj = document.getElementById("tableBox");
            var scrollHeight = obj.scrollHeight;
            var scrollTop = obj.scrollTop;
            var objHeight = obj.offsetHeight; 
            // 100为阈值,可根据实际情况调整   
            if(scrollHeight <= (scrollTop + objHeight + 100) && !this.tableLoading && this.tableList.length<this.tableCount){
                this.tableLoading = true;
                this.tableSearch.page++;
                setTimeout(()=>{  
                    this.getTableData(this.tableSearch);
                },300)
            }
        },
  
        getTableData(search){
            let page = search.page;
            let url = "index?page=" + page;
            // 首次打开页面要加载一次数据,为了防止数据过多自动触发滚动,此处需要置为加载中
            this.tableLoading = true;
            this.$http.get(url).then((result) => {
                if (res.code == 10000) {
                    // 拼接数据
                    this.tableList = this.tableList.concat(result.data.list);
                    this.tableCount = result.count;
                    this.tableSearch.page = result.current;
                    this.tableLoading = false;
                }
            });
        },
         
      
    },
};
</script>
posted @ 2022-03-01 11:23  Ao_min  阅读(1105)  评论(0编辑  收藏  举报