微信小程序点击不同的按钮，展示不同的信息内容

1.有四个导航：推荐、食品、服装、用品；点击不同的按钮，展示不同的内容

2.wxml

<view class='nav'>
  <block wx:for="{{nav}}" wx:key="key">
    <view class="{{ curIndex === item.id ? 'txt' : ''}}" data-id="{{item.id}}" bindtap="navTap">{{item.title}}</view>
  </block>
</view>
<scroll-view>
  <block wx:for="{{list}}" wx:key="key">
    <block wx:if="{{curNav == 0 }}">
      <view class='msg'>
        <text class='name'>{{item.name}}</text>
        <text class='price'>{{item.price}}</text>
      </view>
    </block>
    <block wx:elif="{{curNav == item.type }}">
      <view class='msg'>
        <text class='name'>{{item.name}}</text>
        <text class='price'>{{item.price}}</text>
      </view>
    </block>
  </block>
</scroll-view>

2.wxss

/* pages/nav/nav.wxss */
.nav{
  display: flex;
  justify-content: center;
  align-items: center;
  height:150rpx;
}
.nav view{
  width:33.33%;
  text-align: center;
}
.txt{
  color:#f00;
}
.msg{
  height:150rpx;
  display: flex;
  align-items: center;
  border:1px solid #ddd;
  padding:0 60rpx;
}
.msg text{
  display: block;
}
.msg .name{
  width:300rpx;
  margin-right:30rpx;
}

3.js

data: {
    nav:[
      {
        title:"推荐",
        id:0
      },
      {
        title: "食物",
        id: 1
      },
      {
        title: "服装",
        id: 2
      },
      {
        title: "用品",
        id: 3
      }
    ],
    list:[
      {
        id:1,
        name:'辣条',
        price:3.5,
        type:1
      },
      {
        id: 2,
        name: '辣条1',
        price: 3.5,
        type: 1
      },
      {
        id: 3,
        name: '男装',
        price: 300,
        type: 3
      },
      {
        id: 4,
        name: '豆腐',
        price: 1,
        type: 1
      },
      {
        id: 5,
        name: '女装',
        price: 150,
        type: 2
      },
      {
        id: 6,
        name: '儿童装',
        price: 80,
        type: 2
      },
      {
        id: 7,
        name: '锅',
        price: 58,
        type: 3
      },
      {
        id: 8,
        name: '床上四件套',
        price: 155,
        type: 3
      },
    ],
    curNav:0,
    curIndex:0
  },
  navTap(e){
    let id = e.currentTarget.dataset.id;
    console.log(id);
    this.setData({
      curNav: id,
      curIndex:id
    })
  },

  重点：根据商品的type值来判断展示的内容，如果type值为0，展示所有的商品，如果type的值为1,2,3时，显示相应的商品type的信息