关于Vue中计算属性的用法（附代码）-木庄网络博客

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这篇文章给大家介绍的内容是关于Vue中计算属性的用法（附代码），有一定的参考价值，有需要的朋友可以参考一下，希望对你有所帮助。

计算属性是个很好玩的东西，在这里面可以对数据模型进行操作，?也可以使用getter，setter方法。使用的话也是非常的简洁明了

这里写个例子

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!--<script src="js/vue.min.js"></script>-->
    <script src="vue.min.js"></script>
 
 
</head>
<body>
<div id="app">
    总价：{{prices}}
</div>
<script>
    var app=new Vue({
        el:'#app',
        data:{
            package1:[
                {
                    name:'iPhone 7',
                    price:7199,
                    count:2
                },
                {
                    name:'iPad',
                    price:2888,
                    count:1
                }
            ],
            package2:[
                {
                    name:'apple',
                    price:3,
                    count:5
                },
                {
                  name:'Banana',
                  price:2,
                  count:10
                }
            ]},
            computed:{
                prices:function () {
                    var prices=0;
                    for(var i=0;i<this.package1.length;i++){
                        prices+=this.package1[i].price*this.package1[i].count;
                    }
                    for (var i=0;i<this.package2.length;i++){
                        prices+=this.package2[i].price*this.package2[i].count;
                    }
                    return prices;
                }
            }
 
 
    })
</script>
</body>
</html>

在computed属性里面定义一个计算price的方法，然后对data里面的东西进行操作

下面看一下运行结果：

然后再看一下如何使用getter、setter方法：

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/vue.js"></script>
</head>
<body>
<div id="app">
    姓名：{{fullname}}
</div>
<script>
    var app=new Vue({
        el:'#app',
        data:{
          firstName:'Jack',
          lastName:'Green'
        },
        computed:{
            fullname:{
            //getter，用于读取
            get:function () {
              return this.firstName+ ' '+this.lastName;
            },
            //setter
            set:function (newValue) {
                var names=newValue.split(' ');
                this.firstName=names[0];
                this.lastName=names[names.length-1];
            }
            }
        }
    })
</script>
</body>
</html>