外层循环正常嵌套，内层循环嵌套的时候，把item.swiper_buy作为数组循环wx:for="{{item.swiper_buy}}"，然后给item重新命名wx:for-item="cell"，内部循环的时候，就是{{cell.属性}}
<block wx:for="{{swiper_object}}" wx:key="index">
<swiper-item>
<view class='swiper_in'>
<view class='head_img'>
<image src="{{item.head_img}}"></image>
<view class='head_in'>
<view class='card_name'>嘻哈帮街舞.{{item.card_name}}</view>
<view class="card_i">{{item.card_use}}</view>
<view class='use_region'>{{item.card_region}}</view>
</view>
</view>
<view class='buy_list'>
<block wx:for="{{item.swiper_buy}}" wx:for-item="cell" wx:key="index">
<view class="buy_item {{num==index?'current':''}}" data-index="{{index}}" catchtap='switchTab'>
<view class='buy_price'>
<view class='card_price'>¥{{cell.buy_price}}</view>
<view class='nk_species'>{{cell.card_species}}</view>
</view>
<view class='buy_zs'>{{cell.buy_send}}</view>
</view>
</block>
</view>
</view>
</swiper-item>
</block>
data: {
num: 0,
swiper_object:[
{
swiper_buy: [
{
buy_price: "1100",
card_species: "年卡D",
buy_send: "购买1课点"
},
{
buy_price: "2200",
card_species: "年卡C",
buy_send: "购买9课点"
},
{
buy_price: "3300",
card_species: "年卡B",
buy_send: "购买3课点"
}
],
head_img:"../../images/head_img1.png",
card_name:"次卡",
card_use:"49/课点",
card_region:"本课点全国通用"
},
{
swiper_buy: [
{
buy_price: "1400",
card_species: "一年通",
buy_send: "有效期内享受日课程课"
},
{
buy_price: "2500",
card_species: "两年通",
buy_send: "有效期内享受日课程课"
},
{
buy_price: "46000",
card_species: "单店通",
buy_send: "赠本企业续存期内"
}
],
head_img: "../../images/head_img2.png",
card_name: "少儿畅舞卡",
card_use: "本地使用",
card_region: "有效期内可以享受日常课"
},
]
}