39、购物车_没有商品的提示功能
pages\cart\index.wxml
<!-- 购物车内容-->
<view class="cart_content">
<view class="cart_title">购物车</view>
<view class="cart_main">
<!--当cart数组长度不为0显示商品信息-->
<block wx:if="{
{cart.length!==0}}">
<view class="cart_item"
wx:for="{
{cart}}"
wx:key="goods_id">
<!--复选框-->
<view class="cart_chk_wrap">
<checkbox-group data-id="{
{item.goods_id}}" bindchange="handeItemChange">
<checkbox checked="item.checked"></checkbox>
</checkbox-group>
</view>
<!--商品图片-->
<navigator class="cart_img_wrap">
<image mode="widthFix" src="{
{item.goods_small_logo}}"></image>
</navigator>
<!--商品信息-->
<view class="cart_info_wrap">
<view class="goods_name">{
{item.goods_name}}</view>
<view class="goods_price_wrap">
<view class="goods_price">¥{
{item.goods_price}}</view>
<view class="cart_num_tool">
<view bindtap="handleItemNumEdit" data-id="{
{item.goods_id}}" data-operation="{
{-1}}" class="num_edit">-</view>
<view class="goods_num">{
{item.num}}</view>
<view bindtap="handleItemNumEdit" data-id="{
{item.goods_id}}" data-operation="{
{1}}" class="num_edit">+</view>
</view>
</view>
</view>
</view>
</block>
<!--否则显示一张图片-->
<block wx:else>
<image mode="widthFix" src="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1600243190697&di=14f72b149b5cb68f71a7582900d58e67&imgtype=0&src=http%3A%2F%2Fhbimg.b0.upaiyun.com%2Fe1b1467beea0a9c7d6a56b32bac6d7e5dcd914f7c3e6-YTwUd6_fw658"></image>
</block>
</view>
</view>