new Vue({
  el:"#app",
  //模型
  data:{
  },
  filters:{
  },
  mounted:function(){
    this.$nextTick(function(){
    //初始化调用
    });
  },
  computed:{
    //实时计算
  },
  methods:{
  }
});

<li v-for="(item,index) in productList">
  <div class="item-name">{{item.productName}}</div>
</li>

<input type="text" value="0" disabled v-model="item.productQuantity">
<div class="item-price-total">{{item.productQuantity}}</div>

<a href="javascript:;" class="item-check-btn" v-bind:class="{'check':item.checked}">
<!--可通过更改item.checked的值设置是否选中-->
<!--必须用v-bind 不可直接在class里面直接使用{{}}-->
<!--v-bind:class= 可简写为 :class= -->

<div class="item-price">{{item.productPrice | money('元')}}</div>

filters:{
  formatMoney:function(value,type){
    return "￥"+value.toFixed(2)+ type;
  }
},

Vue.filter("money",function(value,type){
  return "￥"+value.toFixed(2) + type; //保留两位小数 结果eg:￥19.00元
});

@click="method(param)"
//或者
@click="delFlag=false"
@click="limitNum=addressList.length"

<li v-for="(item,index) in filterAddress">
<div class="shipping-addr-more">
<a class="addr-more-btn up-down-btn" href="javascript:" @click="limitNum=addressList.length">
  more
  <i class="i-up-down">
   <i class="i-up-down-l"></i>
   <i class="i-up-down-r"></i>
  </i>
 </a>
</div>

data:{
    limitNum:3
  },
computed:{
  filterAddress:function(){
    return this.addressList.slice(0,this.limitNum);
  }
},

<li v-for="(item,index) in filterAddress" v-bind:class="{'check':index==currentIndex}" 
@click="currentIndex=index">
<!--其中currentIndex在js里需要定义-->

<ul>
  <li v-bind:class="{'check':shippingMethod==1}" @click="shippingMethod=1">
   <div class="name">标准配送</div>
   <div class="price">Free</div>
  </li >
  <li v-bind:class="{'check':shippingMethod==2}" @click="shippingMethod=2">
   <div class="name">高级配送</div>
   <div class="price">180</div>
  </li>
 </ul>
 <!--其中shippingMethod在js里需要定义-->

<div class="md-overlay" v-if="delFlag"></div>

var _this = this;
this.$http.get("data/address.json").then(function(response){
    _this.addressList = response; //这里不能直接用this 此this非彼this 所以只能声明_this
}); 
//以下为ES6写法，就可以直接用this了
let _this = this;  //没用，就放这看看~
this.$http.get("data/cartData.json",{"id":123}).then(res=>{
  this.productList = res.data.result.list;
});

this.productList.forEach(function(item,index){
  if(typeof item.checked == 'undefined'){ 
  //如果item中没有checked属性 在item对象中添加checked属性，值为true
    _this.$set(item,"checked",true);//局部注册
    Vue.set(item,"checked",true);//全局注册
  }
});