How to implement product classification navigation in uniapp

How to implement product classification navigation in uniapp

Introduction: With the rapid development of the mobile Internet, e-commerce platforms have become one of the main channels for people to shop. In order to improve user experience and facilitate users to quickly find the products they need, product category navigation has become increasingly important. This article will introduce how to implement product category navigation in uniapp and provide corresponding code examples.

1. Preparation work
Before starting, we need to prepare the following work:

1. A uniapp project can be created using tools such as HBuilderX.
2. Product classification data, including category name and corresponding product list.

2. Create a category page

1. Create a page in the uniapp project and name it "category".
2. In the vue file of the "category" page, write the following code:

<template>
  <view class="container">
    <view class="category-list">
      <scroll-view class="category-scrollview" scroll-x>
        <view class="category-item" v-for="(item, index) in categoryList" :key="index" @click="selectCategory(item)">
          {{ item.name }}
        </view>
      </scroll-view>
    </view>
    <view class="goods-list">
      <view class="goods-item" v-for="(item, index) in selectedCategory.goodsList" :key="index">
        {{ item.name }}
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        categoryList: [
          { name: "分类1", goodsList: [{ name: "商品1" }, { name: "商品2" }, { name: "商品3" }] },
          { name: "分类2", goodsList: [{ name: "商品4" }, { name: "商品5" }, { name: "商品6" }] },
          { name: "分类3", goodsList: [{ name: "商品7" }, { name: "商品8" }, { name: "商品9" }] }
        ],
        selectedCategory: {}
      }
    },
    methods: {
      selectCategory(category) {
        this.selectedCategory = category;
      }
    }
  }
</script>

<style>
  .container {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 20rpx;
  }
  .category-list {
    flex: 1;
  }
  .category-scrollview {
    white-space: nowrap;
  }
  .category-item {
    display: inline-block;
    padding: 10rpx 20rpx;
    border-radius: 10rpx;
    background-color: #f2f2f2;
    margin-right: 20rpx;
    color: #333;
    font-size: 28rpx;
  }
  .goods-list {
    flex: 1;
    margin-top: 20rpx;
  }
  .goods-item {
    margin-bottom: 10rpx;
    padding: 10rpx 20rpx;
    border-radius: 10rpx;
    background-color: #f2f2f2;
    color: #333;
    font-size: 28rpx;
  }
</style>

The above code implements a product category navigation page, including a horizontally scrolling category list and a Vertical product list.

3. Page Reference

1. In uniapp, we need to reference the category page to other pages.
2. In the vue files of other pages, use the <navigator> tag to reference the "category" page.

<navigator url="/pages/category/category">
  分类导航
</navigator>

The above code will display a button on the current page, and when the user clicks the button, it will jump to the category page.

4. Data transfer and page jump

1. In the "category" page, use the uni.navigateTo method to transfer the selected category data to the product list page.

methods: {
  selectCategory(category) {
    this.selectedCategory = category;
    uni.navigateTo({
      url: '/pages/goodsList/goodsList',
      success: (res) => {
        res.eventChannel.emit('selectedCategory', this.selectedCategory)
      }
    })
  }
}

2. In the "goodsList" page, receive the selected classification data and use the data to display the corresponding product list.

mounted() {
  const eventChannel = this.getOpenerEventChannel()
  eventChannel.on('selectedCategory', (data) => {
    this.selectedCategory = data
  })
},
data() {
  return {
    selectedCategory: {}
  }
}

The above code uses eventChannel to realize data transfer between pages.

Conclusion:
This article introduces how to implement product classification navigation in uniapp, and provides corresponding code examples. In actual development, the page layout and style can be adjusted according to needs, and real product classification data can be obtained according to the back-end interface. I hope the above content is helpful to you, and happy coding!

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