用js實現的分頁結果如圖所示：
css
.page-bar{ margin:40px; } ul,li{ margin: 0px; padding: 0px; } li{ list-style: none } .page-bar li:first-child>a { margin-left: 0px } .page-bar a{ border: 1px solid #ddd; text-decoration: none; position: relative; float: left; 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; }
模版
<div class="page-bar"> <ul> <li v-if="cur>1"><a v-on:click="cur--,pageClick()">上一頁</a></li> <li v-if="cur==1"><a class="banclick">上一頁</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()">下一頁</a></li> <li v-if="cur == all"><a class="banclick">下一頁</a></li> <li><a>共<i>{{all}}</i>頁</a></li> </ul> </div>
js
var pageBar = new Vue({ el: '.page-bar', data: { all: 20, //總頁數 cur: 1,//當前頁碼 });
調用 new Vue({參數}) 就是創建了一個基本的組件,賦值給變量 pageBar.
el就是element的縮寫,定位模版的位置.data就是數據了.
知道了總頁數但是要顯示頁碼還是要一番計算,所以顯示頁碼就是計算屬性了.
所以我們要用computed
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 } }
看一下頁面顯示出來的循環：
<li v-for="index in indexs" v-bind:class="{ 'active': cur == index}"> <a v-on:click="btnClick(index)">{{ index }}</a> </li>
v-for是循環渲染輸出計算屬性indexs.每一次循環的子元素賦值給index v-bind:class綁定class,當渲染到目前的角標的時候加個class v-on:click是綁定了事件，我把index當參數傳進入了,后面做判斷，默認傳event事件.
然后我們給Vue的選項里面再增加methods字段
methods: { btnClick: function(data){//頁碼點擊事件 if(data != this.cur){ this.cur = data } }, pageClick: function(){ console.log('現在在'+this.cur+'頁'); } },
組件交互
組件寫完了，問題來了，用戶點擊發生頁面改變，你怎么通知其他組件作出相應的變化. 可以在頁角發生改變的函數下，插一條語句通知其他組件。不過這種方法是很差的做法。可以使用
watch: { cur: function(oldValue , newValue){ console.log(arguments); } }
觀察了cur數據當它改變的時候，可以獲取前后值。然后通知其他組件。
完整的代碼：
<!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.min.js"></script> <style> .page-bar{ margin:40px; } ul,li{ margin: 0px; padding: 0px; } li{ list-style: none } .page-bar li:first-child>a { margin-left: 0px } .page-bar a{ border: 1px solid #ddd; text-decoration: none; position: relative; float: left; 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 class="page-bar"> <ul> <li v-if="cur>1"><a v-on:click="cur--,pageClick()">上一頁</a></li> <li v-if="cur==1"><a class="banclick">上一頁</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()">下一頁</a></li> <li v-if="cur == all"><a class="banclick">下一頁</a></li> <li><a>共<i>{{all}}</i>頁</a></li> </ul> </div> <script type="text/javascript"> var pageBar = new Vue({ el: '.page-bar', data: { all: 8, //總頁數 cur: 1//當前頁碼 }, watch: { cur: function(oldValue , newValue){ console.log(arguments); } }, methods: { btnClick: function(data){//頁碼點擊事件 if(data != this.cur){ this.cur = data } }, pageClick: function(){ console.log('現在在'+this.cur+'頁'); } }, 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 } } }) </script> </body> </html>
參考地址
https://www.zhihu.com/question/37174943
https://segmentfault.com/a/1190000003931500