How to implement pull-down to refresh and pull-up to load more in uniapp

Title: More tips and examples to implement pull-down refresh and pull-up loading in uniapp

Introduction:
In mobile application development, pull-down refresh and pull-up loading Pull-loading more is a common feature request that can improve user experience and provide smoother interactions. This article will introduce in detail how to implement these two functions in uniapp, and give specific code examples to help developers quickly master the implementation skills.

1. Implementation of pull-down refresh
Pull-down refresh means that after the user slides down a certain distance from the top of the page, an action is triggered to refresh the page data. In uniapp, this can be achieved through the pull-down refresh component uni-scroll-view.

1. Add a drop-down refresh component in <template></template>:

   <view>
     <uni-scroll-view refresher-enabled @pulling-down="refreshData">
    <!-- 显示刷新的动画内容 -->
    <view slot="refresher">下拉刷新中...</view>
    
    <!-- 页面内容 -->
    <view class="content">
      <!-- 数据显示内容 -->
    </view>
     </uni-scroll-view>
   </view>

2. In<script> Add pull-down refresh logic in :

   export default {
     data() {
    return {
      // 数据列表
      dataList: []
    }
     },
     methods: {
    // 下拉刷新事件
    refreshData() {
      // 发起请求获取最新数据
      // 并更新dataList
      // 示例代码略
      
      // 停止下拉刷新的动画
      uni.stopPullDownRefresh();
    }
     }
   }

2. Implementation of pull-up to load more
Pull-up to load more means that the user slides up a certain distance from the bottom of the page Later, trigger an action to load more data. In uniapp, this can be achieved by pulling up the bindscrolltolower event in uni-scroll-view to load more components.

1. Add pull-up in <template> to load more components:

   <view>
     <uni-scroll-view bindscrolltolower="loadMoreData">
    <!-- 显示加载更多动画内容 -->
    <view slot="scroll-bottom">加载中...</view>
    
    <!-- 页面内容 -->
    <view class="content">
      <!-- 数据显示内容 -->
    </view>
     </uni-scroll-view>
   </view>

2. In&lt ;script>Add more logic for pull-up loading:

   export default {
     data() {
    return {
      // 数据列表
      dataList: [],
      // 是否正在加载更多数据的标志
      isLoadingMore: false
    }
     },
     methods: {
    // 上拉加载更多事件
    loadMoreData() {
      // 避免重复加载数据
      if (this.isLoadingMore) {
        return;
      }
      
      // 设置加载更多的标志为true
      this.isLoadingMore = true;
      
      // 发起请求获取更多数据
      // 并将新的数据添加到dataList中
      // 示例代码略
      
      // 停止加载更多的动画
      uni.hideNavigationBarLoading();
      
      // 设置加载更多的标志为false
      this.isLoadingMore = false;
    }
     }
   }

Summary:
Through the above introduction, we can see that pull-down refresh and Pulling up to load more features is relatively simple. By properly combining the event handling of the pull-down refresh componentuni-scroll-view and the pull-up to load more componentsuni-scroll-view, we can quickly implement these two common interactions function to facilitate mobile application development.

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