vuejs2.0实现分页组件，使用$emit进行事件监听数据传递

来源：互联网发布：厦门西岐网络上市编辑：程序博客网时间：2024/06/11 22:39

上一篇文章介绍了vuejs实现的简单分页，如果我有几个页面都需要有分页效果，不可能每个页面都去复制一下这段代码吧，意思是封装一下，变成通用的组件。https://segmentfault.com/a/1190000008446707

首先使用基础 Vue 构造器，创建一个“子类”,Vue.extend( options )

var barHtml = '<div class="page-bar">'+                    '<ul>'+                        '<li v-if="cur>1"><a v-on:click="cur--,pageClick()">上一页</a></li>'+                        '<li v-if="cur==1"><a class="banclick">上一页</a></li>'+                        '<li v-for="index in indexs"  v-bind:class="{ active: cur == index}">'+                            '<a v-on:click="btnclick(index)">{{ index }}</a>'+                        '</li>'+                        '<li v-if="cur!=all"><a v-on:click="cur++,pageClick()">下一页</a></li>'+                        '<li v-if="cur == all"><a class="banclick">下一页</a></li>'+                        '<li><a>共<i>{{all}}</i>页</a></li>'+                    '</ul>'+                '</div>';    var navBar = Vue.extend({        template:barHtml,        props:['all','cur'],        computed: {            indexs: function(){              var left = 1;              var right = this.all;              var ar = [];              if(this.all>= 5){                if(this.cur > 3 && this.cur < this.all-2){                        left = this.cur - 2                        right = this.cur + 2                }else{                    if(this.cur<=3){                        left = 1                        right = 5                    }else{                        right = this.all                        left = this.all -4                    }                }             }            while (left <= right){                ar.push(left)                left ++            }            return ar           }             },        methods: {            btnclick: function(data){                if(data != this.cur){                    this.cur = data;                    this.$emit('btn-click',data);                 }            },            pageClick: function(){                this.$emit('btn-click',this.cur);            }        },        });    window.pagenav = navBar;

这儿创建了一个全局的pagenav，可以在其它地方都可以调用。

html代码

<div id="page">    <vue-nav :cur.sync="cur" :all.sync="all" v-on:btn-click="listenDate"></vue-nav>    <p style="margin-left:40px;">{{msg}}</p></div>

css代码

.page-bar{    margin:40px;}ul,li{    margin: 0px;    padding: 0px;}li{    list-style: none}.page-bar ul{    overflow: hidden;}.page-bar li{    float: left;}.page-bar li:first-child>a {   margin-left: 0px}.page-bar a{    display: block;    border: 1px solid #ddd;    text-decoration: none;    position: relative;    padding: 6px 12px;    margin-left: -1px;    line-height: 1.42857143;    color: #337ab7;    cursor: pointer}.page-bar a:hover{    background-color: #eee;}.page-bar a.banclick{    cursor:not-allowed;}.page-bar .active a{    color: #fff;    cursor: default;    background-color: #337ab7;    border-color: #337ab7;}.page-bar i{    font-style:normal;    color: #d44950;    margin: 0px 4px;    font-size: 12px;}

新建一个vue对象实例

var pageBar = new Vue({        el: '#page',        data: {            all: 8, //总页数            cur: 1,//当前页码            msg:''        },        components:{            'vue-nav':pagenav        },        watch: {            cur: function(oldValue , newValue){                console.log('监听cur前与后的值：');                console.log(arguments);            }        },            methods:{            listenDate:function(data){                this.cur = data;                this.msg = '你点击了'+data+ '页';            }      }    })

简单的用js封装了一下分页组件。

实现效果

完整代码：

<!DOCTYPE html><html><head><meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"/><meta charset="utf-8"><title></title><meta name="keywords" content="" /><meta name="description" content="" /><script type="text/javascript" src="js/vue.min2.js"></script><style>.page-bar{    margin:40px;}ul,li{    margin: 0px;    padding: 0px;}li{    list-style: none}.page-bar ul{    overflow: hidden;}.page-bar li{    float: left;}.page-bar li:first-child>a {   margin-left: 0px}.page-bar a{    display: block;    border: 1px solid #ddd;    text-decoration: none;    position: relative;    padding: 6px 12px;    margin-left: -1px;    line-height: 1.42857143;    color: #337ab7;    cursor: pointer}.page-bar a:hover{    background-color: #eee;}.page-bar a.banclick{    cursor:not-allowed;}.page-bar .active a{    color: #fff;    cursor: default;    background-color: #337ab7;    border-color: #337ab7;}.page-bar i{    font-style:normal;    color: #d44950;    margin: 0px 4px;    font-size: 12px;}</style></head><body><div id="page">    <vue-nav :cur.sync="cur" :all.sync="all" v-on:btn-click="listenDate"></vue-nav>    <p style="margin-left:40px;">{{msg}}</p></div><script type="text/javascript">    var barHtml = '<div class="page-bar">'+                    '<ul>'+                        '<li v-if="cur>1"><a v-on:click="cur--,pageClick()">上一页</a></li>'+                        '<li v-if="cur==1"><a class="banclick">上一页</a></li>'+                        '<li v-for="index in indexs"  v-bind:class="{ active: cur == index}">'+                            '<a v-on:click="btnclick(index)">{{ index }}</a>'+                        '</li>'+                        '<li v-if="cur!=all"><a v-on:click="cur++,pageClick()">下一页</a></li>'+                        '<li v-if="cur == all"><a class="banclick">下一页</a></li>'+                        '<li><a>共<i>{{all}}</i>页</a></li>'+                    '</ul>'+                '</div>';    var navBar = Vue.extend({        template:barHtml,        props:['all','cur'],        computed: {            indexs: function(){              var left = 1;              var right = this.all;              var ar = [];              if(this.all>= 5){                if(this.cur > 3 && this.cur < this.all-2){                        left = this.cur - 2                        right = this.cur + 2                }else{                    if(this.cur<=3){                        left = 1                        right = 5                    }else{                        right = this.all                        left = this.all -4                    }                }             }            while (left <= right){                ar.push(left)                left ++            }            return ar           }             },        methods: {            btnclick: function(data){                if(data != this.cur){                    this.cur = data;                    this.$emit('btn-click',data);                 }            },            pageClick: function(){                this.$emit('btn-click',this.cur);            }        },        });    window.pagenav = navBar;    var pageBar = new Vue({        el: '#page',        data: {            all: 8, //总页数            cur: 1,//当前页码            msg:''        },        components:{            'vue-nav':pagenav        },        watch: {            cur: function(oldValue , newValue){                console.log('监听cur前与后的值：');                console.log(arguments);            }        },            methods:{            listenDate:function(data){                this.cur = data;                this.msg = '你点击了'+data+ '页';            }      }    })</script></body></html>

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