Use WeChat applet to achieve page sliding effects

Use WeChat mini programs to achieve page sliding effects

With the continuous development of WeChat mini programs, more and more developers are beginning to use WeChat mini programs to develop various Various practical applications. Among them, the page sliding effect is a very common and dynamic effect. This article will introduce how to use WeChat applet to achieve page sliding effects and provide specific code examples.

In the WeChat applet, we can use the swiper component to achieve the sliding effect of the page. Swiper can scroll content horizontally or vertically, and supports functions such as gesture sliding and automatic carousel. The following is a simple sample code that demonstrates how to use swiper to achieve page sliding effects.

First, create a swiper component in the wxml file:

<swiper class="swiper" indicator-dots="{{indicatorDots}}" indicator-active-color="{{indicatorColor}}" autoplay="{{autoplay}}" interval="{{interval}}" duration="{{duration}}">
  <block wx:for="{{imageUrls}}" wx:key="url">
    <swiper-item>
      <image src="{{item}}" class="image"></image>
    </swiper-item>
  </block>
</swiper>

In the corresponding wxss file, we can define the style of the sliding area:

.swiper {
  width: 100%;
  height: 400rpx; /* 自定义高度 */
}

.image {
  width: 100%;
  height: 100%;
}

Next, in In the corresponding js file, we can initialize data and set related configurations:

Page({
  data: {
    imageUrls: [
      'https://example.com/image1.jpg',
      'https://example.com/image2.jpg',
      'https://example.com/image3.jpg'
    ],
    indicatorDots: true, // 是否显示指示点
    indicatorColor: "#ffffff", // 指示点颜色
    autoplay: true, // 是否自动播放
    interval: 3000, // 自动切换时间间隔
    duration: 500 // 动画时长
  }
})

In the above code, we define an imageUrls array, which contains the URLs of three pictures. By modifying the contents of this array, we can switch the displayed pictures at any time.

In addition, we can also control functions such as indicator points, automatic playback, switching time intervals, and animation duration by modifying parameters such as indicatorDots, autoplay, interval, and duration.

In addition to basic sliding effects, we can also achieve more interactive effects through events of the swiper component. For example, we can add a bindchange event to the swiper component and trigger the corresponding callback function when the page is switched:

<swiper class="swiper" indicator-dots="{{indicatorDots}}" indicator-active-color="{{indicatorColor}}" autoplay="{{autoplay}}" interval="{{interval}}" duration="{{duration}}" bindchange="swiperChange">

Page({
  // ...
  swiperChange(e) {
    console.log('当前页面索引：', e.detail.current)
  }
})

In the above code, we added the bindchange event to the swiper component and set the corresponding callback function in the swiper component. Prints the index of the current page. Through this event, we can obtain the index of the current page, thereby achieving a more flexible page switching effect.

Through the above steps, we can implement the page sliding effect in the WeChat applet. Of course, the above code is just a simple example, and developers can make more complex customizations according to their own needs. I hope this article will be helpful to developers who are learning WeChat applet development.

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