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。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 = ''+

barnettyj

5119人浏览 · 2017-02-23 08:38:29

barnettyj · 2017-02-23 08:38:29 发布

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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