How to implement drop-down loading with more functions in uniapp

How to implement drop-down loading of more functions in uniapp

1. Background introduction
With the development of the mobile Internet, users' demand for mobile applications is getting higher and higher. When developing mobile applications, it is often necessary to implement more pull-down loading functions to provide a better user experience. This article will introduce how to implement drop-down loading with more functions in uniapp.

2. Implementation steps

1. In uniapp, you can use the scroll-view component to achieve the scrolling effect of the page. In pages that need to implement drop-down loading of more pages, you first need to introduce the scroll-view component in the template and set its attributes:

<scroll-view class="scroll-view" scroll-y ref="scrollView" @scrolltolower="loadMore">
    <!-- 这里是页面具体内容 -->
</scroll-view>

Among them, the class attribute can be styled as needed, scroll-y The attribute indicates that vertical scrolling is allowed, and the ref attribute is used to obtain the scroll-view instance. @scrolltolower means that the loadMore method is triggered when the page scrolls to the bottom.

2. In the script, you need to define the loadMore method and handle the logic of loading more:

export default {
    methods: {
        loadMore() {
            // 执行加载更多逻辑
        }
    }
}

In the loadMore method, you can use uni.request to request The server fetches more data and adds it to the data already on the current page.

3. In the data of the page, you need to define a variable to store the existing data of the current page:

export default {
    data() {
        return {
            dataList: [] // 当前页面已有的数据
        }
    }
}

4. In the loadMore method, you can call The uni.request method requests the server to obtain more data, and then adds these data to the existing data dataList of the current page:

export default {
    methods: {
        loadMore() {
            uni.request({
                url: 'http://example.com/api/getMoreData',
                success: (res) => {
                    // 将获取的数据添加到dataList中
                    this.dataList = this.dataList.concat(res.data);
                }
            })
        }
    }
}

In this way, when the page scrolls to the bottom, the loadMore method will be triggered , gets more data from the server and adds it to the dataList of the current page.

5. In the template of the page, the data in the dataList can be rendered to the page through the v-for instruction:

<scroll-view class="scroll-view" scroll-y ref="scrollView" @scrolltolower="loadMore">
    <view v-for="(item, index) in dataList" :key="index">
        <!-- 这里是每条数据的渲染逻辑 -->
    </view>
</scroll-view>

In the v-for instruction, you can traverse Each item of data in the dataList array is rendered on the page.

3. Summary
Through the above steps, we can implement more pull-down loading functions in uniapp. First, introduce the scroll-view component in the template and set the scroll-y attribute and ref attribute on it. Then, define the loadMore method in the script and use the uni.request method to get more data from the server and add it to the dataList of the current page. Finally, use the v-for directive in the template to render the data in the dataList onto the page.

I hope this article will be helpful to you in implementing more drop-down loading functions in uniapp!

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