微信小程序的分类页面制作

classify.js
Page({
data: {
 cateItems: [
  {
   cate_id: 1,
   cate_name: "护肤",
   ishaveChild: true,
   children:
   [
    {
     child_id: 1,
     name: '洁面皂',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161208/148117972563.jpg"
    },
    {
     child_id: 2,
     name: '卸妆',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161207/148110444480.jpg"
    },
    {
     child_id: 3,
     name: '洁面乳',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161208/148117973270.jpg"
    },
    {
     child_id: 4,
     name: '面部祛角质',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161208/148117981591.jpg"
    }
   ]
  },
  {
   cate_id: 2,
   cate_name: "彩妆",
   ishaveChild: true,
   children:
   [
    {
     child_id: 1,
     name: '气垫bb',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161212/14815381301.jpg"
    },
    {
     child_id: 2,
     name: '修容/高光',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161212/14815381411.jpg"
    },
    {
     child_id: 3,
     name: '遮瑕',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161212/148153815181.jpg"
    },
    {
     child_id: 4,
     name: '腮红',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161212/148153815759.jpg"
    },
    {
     child_id: 5,
     name: '粉饼',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161212/148153816983.jpg"
    },
    {
     child_id: 6,
     name: '粉底',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161212/148153817721.jpg"
    },
    {
     child_id: 7,
     name: '蜜粉/散粉',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161212/148153819354.jpg"
    },
    {
     child_id: 8,
     name: '隔离霜',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161215/148179053369.jpg"
    }
   ]
  },
  {
   cate_id: 3,
   cate_name: "香水/香氛",
   ishaveChild: true,
   children:
   [
    {
     child_id: 1,
     name: '淡香水EDT',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161213/14815978910.jpg"
    },
    {
     child_id: 2,
     name: '浓香水EDP',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161213/148159789883.jpg"
    },
    {
     child_id: 3,
     name: '香体走珠',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161213/14815979307.jpg"
    },
    {
     child_id: 4,
     name: '古龙香水男士的最爱',
     image: "http://mz.djmall.xmisp.cn/files/logo/20161213/148159765589.jpg"
    }
   ]
  },
  {
   cate_id: 4,
   cate_name: "个人护理",
   ishaveChild: false,
   children: []
  }
 ],
 curNav: 1,
 curIndex: 0
},

//事件处理函数 
switchRightTab: function (e) {
 // 获取item项的id，和数组的下标值 
 let id = e.target.dataset.id,
  index = parseInt(e.target.dataset.index);
 // 把点击到的某一项，设为当前index 
 this.setData({
  curNav: id,
  curIndex: index
 })
}
})

<!--主盒子-->
<view class="container">
<!--左侧栏-->
<view class="nav_left">
 <block wx:for="{{cateItems}}">
  <!--当前项的id等于item项的id，那个就是当前状态-->
  <!--用data-index记录这个数据在数组的下标位置，使用data-id设置每个item的id值，供打开2级页面使用-->
  <view class="nav_left_items {{curNav == item.cate_id ? 'active' : ''}}" bindtap="switchRightTab" data-index="{{index}}" data-id="{{item.cate_id}}">{{item.cate_name}}</view>
 </block>
</view>
<!--右侧栏-->
<view class="nav_right">
 <!--如果有数据，才遍历项-->
 <view wx:if="{{cateItems[curIndex].ishaveChild}}">
  <block wx:for="{{cateItems[curIndex].children}}">
   <view class="nav_right_items">
   <!--界面跳转 -->
    <navigator url="../../detail/detail}}">
     <image src="{{item.image}}"></image>
     <text>{{item.name}}</text>
    </navigator>
   </view>
  </block>
 </view>
 <!--如果无数据，则显示数据-->
 <view class="nodata_text" wx:else>该分类暂无数据</view>
</view>
</view>

classify.wxss
page{ 
background: #f5f5f5; 
} 
/*总体主盒子*/ 
.container { 
position: relative; 
width: 100%; 
height: 100%; 
background-color: #fff; 
color: #939393; 
}
/*左侧栏主盒子*/ 
.nav_left{ 
/*设置行内块级元素（没使用定位）*/ 
display: inline-block; 
width: 25%; 
height: 100%; 
/*主盒子设置背景色为灰色*/ 
background: #f5f5f5; 
text-align: center; 
} 
/*左侧栏list的item*/ 
.nav_left .nav_left_items{ 
/*每个高30px*/ 
height: 40px; 
/*垂直居中*/ 
line-height: 40px; 
/*再设上下padding增加高度，总高42px*/ 
padding: 6px 0; 
/*只设下边线*/ 
border-bottom: 1px solid #dedede; 
/*文字14px*/ 
font-size: 14px; 
} 
/*左侧栏list的item被选中时*/ 
.nav_left .nav_left_items.active{ 
/*背景色变成白色*/ 
background: #fff; 
color: #f0145a; 
} 
/*右侧栏主盒子*/ 
.nav_right{ 
/*右侧盒子使用了绝对定位*/ 
position: absolute; 
top: 0; 
right: 0; 
flex: 1; 
/*宽度75%，高度占满，并使用百分比布局*/ 
width: 75%; 
height: 1000px; 
padding: 10px; 
box-sizing: border-box; 
background: #fff; 
} 
/*右侧栏list的item*/ 
.nav_right .nav_right_items{ 
/*浮动向左*/ 
float: left; 
/*每个item设置宽度是33.33%*/ 
width: 33.33%; 
height: 120px; 
text-align: center; 
} 
.nav_right .nav_right_items image{ 
/*被图片设置宽高*/ 
width: 60px; 
height: 60px; 
margin-top: 15px; 
} 
.nav_right .nav_right_items text{ 
/*给text设成块级元素*/ 
display: block; 
margin-top: 15px; 
font-size: 14px; 
color: black;
/*设置文字溢出部分为...*/ 
overflow: hidden; 
white-space: nowrap; 
text-overflow: ellipsis; 
} 
.nodata_text
{
color: black;
font-size: 14px; 
text-align: center; 
}

<view wx:for="{{items}}">
{{index}}: {{item.message}}
</view>

<view wx:for="{{array}}" wx:for-index="idx" wx:for-item="itemName">
{{idx}}: {{itemName.message}}
</view>

<view wx:if="{{length > 5}}"> 1 </view>
<view wx:elif="{{length > 2}}"> 2 </view>
<view wx:else> 3 </view>