VUE2.0 饿了么学习笔记（8）VUE "TypeError: Cannot read property 'deliveryPrice' of undefined"报错

 <shopcart :delivery-price="seller.deliveryPrice" :min-price="seller.minPrice"></shopcart>中.VUE "TypeError: Cannot read property 'deliveryPrice' of undefined"报错
在app.vue中把seller传进来<router-view seller="seller"></router-view>
过程：
1）在app.vue中把seller传递到goods组件<router-view seller="seller"></router-view>
2）在goods.vue把seller传递到shopcart.vue组件

<shopcart :delivery-price="seller.deliveryPrice" :min-price="seller.minPrice"></shopcart>

前提是在goods.vue中已经引入seller

props： {
		seller：{
			type: Object
		}
	}

3)在shopcart中接收（props）这个值， <div class="desc">另需配送费{{deliveryPrice}}元</div>

export default {
		props: {
			deliveryPrice: {
				type: Number,
				default: 0
			}
			minPrice: {
				type: Number,
				default: 0
			}
		}
	}