Use WeChat applet to achieve sliding menu effect

Use WeChat applet to implement sliding menu effect

WeChat applet, as a tool that is rapidly developed and widely used, provides us with a variety of ways to implement sliding menus effect method. This article will show you a simple and practical implementation method to help you easily add sliding menu effects in development.

1. Preparation
   Before we start coding, we need to create a basic applet project and open the page where we need to add the sliding menu effect.
2. Layout structure
   We first need to build the layout structure of the page in the wxml file. The following is a simple example:

<!-- 页面布局 -->
<view class="container">
  <view class="content">
    <view class="item" wx:for="{{list}}" wx:key="{{index}}" catchtouchmove="catchTouchMove">
      {{item}}
    </view>
  </view>
</view>

In the above code, we use the wx:for directive to loop through rendering menu items and add catchtouchmove to each menu item Event, used to trigger the effect of the sliding menu.

3. Style settings
   Next, add styles for the menu items and sliding menu effects in the wxss file. Here is a simple example:

/* 页面样式 */
.container {
  width: 100%;
  height: 100vh;
  background-color: #f2f2f2;
  overflow: hidden;
}

.content {
  width: 100%;
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
}

.item {
  width: 100%;
  height: 100px;
  line-height: 100px;
  text-align: center;
  background-color: #fff;
  border-bottom: 1px solid #ccc;
}

/* 滑动菜单样式 */
.item-move {
  transition: transform .3s;
  transform: translateX(0);
}

.item-remove {
  transform: translateX(-100%);
}

In the above code, we define the container, content and style of each menu item. At the same time, we use the transform attribute combined with the transition effect to achieve the animation effect when the menu slides.

4. Event processing
   In the js file, we need to write the relevant event processing function to achieve the effect of the sliding menu. The following is a simple example:

Page({
  data: {
    list: ['菜单1', '菜单2', '菜单3'],
    startX: 0
  },
  catchTouchMove: function(ev) {
    if (ev.touches.length == 1) {
      this.setData({
        startX: ev.touches[0].clientX
      })
    }
  },
  catchTouchEnd: function(ev) {
    const index = ev.currentTarget.dataset.index;
    const moveX = ev.changedTouches[0].clientX - this.data.startX;
    if (moveX < -60) {
      const list = this.data.list;
      list.splice(index, 1);
      this.setData({
        list: list
      })
    }
  }
})

In the above code, we define a catchTouchMove event handler function to record the coordinates when the sliding starts. Subsequently, we wrote a catchTouchEnd event handling function to determine whether the menu item needs to be deleted when the sliding ends.

5. Add interactive effects
   Finally, in the menu item tag of the wxml file, we added the corresponding event processing. The following is a simple example:

<view class="item" wx:for="{{list}}" wx:key="{{index}}" catchtouchmove="catchTouchMove" bindtap="catchTouchEnd" data-index="{{index}}">
  {{item}}
</view>

In the above code, we use the bindtap event binding mechanism to bind the sliding end event processing method to the menu item. Implemented the interactive effect of deleting menu items.

So far, we have completed the implementation of the sliding menu effect in the WeChat applet. Through simple layout, style setting and event handling, we can easily add a sliding menu effect similar to that in WeChat to the mini program page.

Summary:
This article introduces the detailed steps on how to use WeChat applet to achieve the sliding menu effect, including layout structure, style setting, event processing and adding interactive effects. I hope this article will be helpful to your development work, and I wish you success in WeChat mini program development!

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