WeChat applet realizes page folding and unfolding effect

WeChat Mini Program realizes page folding and expansion effect

As a lightweight mobile application development tool, WeChat Mini Program provides rich interface components and simple Develop syntax to facilitate developers to develop small program applications. This article will introduce how to use WeChat applet to achieve the folding and unfolding effect of the page, and provide specific code examples for reference.

1. Implementation ideas

To achieve the folding and unfolding effect of the page, you need to use the list component and animation effect of the mini program. The specific implementation ideas are as follows:

1. Create a list component in the page to display folded content.

2. By binding the click event, switch the folded state when the user clicks the fold button.

3. In the click event, trigger the re-rendering of the mini program by changing the value of the data binding variable.

4. Use the animation of the mini program to achieve the process effect of folding and unfolding.

2. Code Example

The following is a simple WeChat applet page code example, showing how to achieve the folding and unfolding effect of the page:

<!-- index.wxml -->
<view class="container">
  <view class="header" bindtap="toggleFold">
    <text>{{fold ? '展开' : '折叠'}}</text>
  </view>
  <view class="content" style="{{fold ? '' : 'height:0;'}}">
    <!-- 折叠内容 -->
  </view>
</view>

// index.js
Page({
  data: {
    fold: true, // 初始折叠状态为true
  },
  toggleFold: function() {
    this.setData({ fold: !this.data.fold }); // 切换折叠状态
  }
})

/* index.wxss */
.container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.header {
  width: 100%;
  height: 40px;
  line-height: 40px;
  text-align: center;
  background-color: #f0f0f0;
  cursor: pointer;
}
.content {
  width: 100%;
  background-color: #fff;
  overflow: hidden;
  transition: height 0.3s;
}

In the above code, The fold button on the page is bound to the toggleFold function, which is used to switch the folded state. The toggleFold function inverts the value of the data binding variable fold by calling this.setData method, thereby triggering re-rendering of the page. In the style, the height of the content class is determined whether to fold based on the value of fold.

3. Summary

Through the above code examples, we can see that using the list component and animation effect of the WeChat applet, we can simply achieve the folding and unfolding effect of the page. Developers can further optimize and expand the code according to their own needs to meet the actual needs of the project. I hope this article can help you achieve the page folding and expansion effect in the development of WeChat applet.

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