How to dynamically turn off pull-down refresh in uniapp

Uniapp dynamically closes pull-down refresh

Uniapp is a development tool with cross-platform features that can quickly build applications between various platforms. Pull-down refresh is a commonly used function, but in some cases it needs to be dynamically closed. Below we will introduce in detail how to dynamically close Uniapp pull-down refresh.

First of all, when writing code, we need to use the drop-down refresh component in the page and define variables in the created life cycle to control whether it is turned on:

<template>
  <div>
    <view class="content" style="padding-top:{{(statusBarHeight + navigationBarHeight) + &#39;px&#39;}}">
      <!-- 下拉刷新组件 -->
      <uni-scroll-view refresher-enabled="{{ canRefresher }}" :refresher-triggered="onRefresh">
        <!-- 内容块 -->
      </uni-scroll-view>
    </view>
  </div>
</template>
<script>
export default {
  data() {
    return {
      canRefresher: true, // 是否开启下拉刷新
    };
  },
  methods: {
    onRefresh() {
      // 下拉刷新回调函数
    },
  },
  created() {
    this.canRefresher = true; // 默认开启下拉刷新
  },
};
</script>

In the above code, we A canRefresher variable is defined to control whether pull-down refresh is enabled. In the created life cycle function, we set the default value of canRefresher to true, which means pull-down refresh is enabled by default.

When we need to dynamically turn off the pull-down refresh function, we only need to set the canRefresher variable to false in the corresponding method:

methods: {
  stopRefresh() {
    this.canRefresher = false; // 关闭下拉刷新
  },
},

Use this method to turn off the pull-down refresh function.

But if we want to synchronously update other content on the page when the pull-down refresh is turned off, how should we do it? Next we will explain step by step.

First of all, in Vue, each attribute in the data attribute has a corresponding getter and setter method. We can monitor changes in the canRefresher value in the setter method and perform corresponding operations when it changes.

For example, in the following code, we demonstrate how to execute the additional method stopLoadData() when the canRefresher value changes. This method can be defined according to the actual situation, such as updating page content, etc.

<template>
  <div>
    <view class="content" style="padding-top:{{(statusBarHeight + navigationBarHeight) + &#39;px&#39;}}">
      <!-- 下拉刷新组件 -->
      <uni-scroll-view refresher-enabled="{{ canRefresher }}" :refresher-triggered="onRefresh">
        <!-- 内容块 -->
      </uni-scroll-view>
    </view>
  </div>
</template>

<script>
export default {
  data() {
    return {
      canRefresher: true, // 是否开启下拉刷新
    };
  },
  methods: {
    onRefresh() {
      // 下拉刷新回调函数
    },
    stopLoadData() {
      // 停止数据加载
      console.log('停止数据加载');
    },
  },
  created() {
    this.canRefresher = true; // 默认开启下拉刷新
  },
  watch: {
    canRefresher(newVal, oldVal) {
      if (!newVal) {
        this.stopLoadData();
      }
    },
  },
};
</script>

In the above code, we define a method named stopLoadData. In the setter method of canRefresher, monitor the value of canRefresher. When canRefresher becomes false, that is, when the pull-down refresh function is turned off, it will automatically Perform the operations in the stopLoadData method.

To sum up, through dynamic control of the canRefresher variable, we can realize the dynamic closing of Uniapp pull-down refresh and automatically perform other operations when closing.

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