vuejs2.0实现分页组件，使用$emit进行事件监听数据传递
上一篇文章介绍了vuejs实现的简单分页，如果我有几个页面都需要有分页效果，不可能每个页面都去复制一下这段代码吧，意思是封装一下，变成通用的组件。
首先使用基础 Vue 构造器，创建一个“子类”,Vue.extend( options )
var barHtml = '<div class="page-bar">'+ '<ul>'+ '<li v-if="cur>1"><a v-on:click="cur--,pageClick()">上一页</a></li>'+ '<li v-if="cur==1"><a class="banclick">上一页</a></li>'+ '<li v-for="index in indexs" v-bind:class="{ active: cur == index}">'+ '<a v-on:click="btnclick(index)">{{ index }}</a>'+ '</li>'+ '<li v-if="cur!=all"><a v-on:click="cur++,pageClick()">下一页</a></li>'+ '<li v-if="cur == all"><a class="banclick">下一页</a></li>'+ '<li><a>共<i>{{all}}</i>页</a></li>'+ '</ul>'+ '</div>'; var navBar = Vue.extend({ template:barHtml, props:['all','cur'], computed: { indexs: function(){ var left = 1; var right = this.all; var ar = []; if(this.all>= 5){ if(this.cur > 3 && this.cur < this.all-2){ left = this.cur - 2 right = this.cur + 2 }else{ if(this.cur<=3){ left = 1 right = 5 }else{ right = this.all left = this.all -4 } } } while (left <= right){ ar.push(left) left ++ } return ar } }, methods: { btnclick: function(data){ if(data != this.cur){ this.cur = data; this.$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
<!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>
