Use uniapp to achieve full-screen scrolling effect

Using uniapp to achieve the full-screen scrolling effect requires specific code examples

In mobile application development, the full-screen scrolling effect is a common interaction method. Using the uniapp framework, we can easily achieve this effect. This article will introduce how to use uniapp to achieve full-screen scrolling and give detailed code examples.

The full-screen scrolling effect usually combines page switching and scrolling animation, allowing users to switch pages through sliding gestures in the application, enhancing interaction and user experience. Below we will follow the steps below to achieve the full-screen scrolling effect.

1. Set full-screen layout

First, create a new page in the uniapp project, such as "fullScreenScroll". In the .vue file of the page, set up a full-screen container to place the content of each scrolling page.

<template>
  <view class="full-screen-container">
    <!-- 这里放置每个滚动页面的内容 -->
  </view>
</template>

<style>
.full-screen-container {
  width: 100%;
  height: 100vh; /* 设置容器的高度为屏幕高度 */
  overflow: hidden; /* 隐藏容器溢出的内容 */
  display: flex; /* 使用flex布局 */
  flex-direction: column; /* 垂直布局 */
}
</style>

2. Writing a scrolling page component

In the full-screen container, we need to add multiple scrolling pages, each page corresponding to a component. In uniapp, we can use the uni-view component to implement scrolling pages. In the script of the page.vue file, define an array of components to store the scrolling page.

export default {
  data() {
    return {
      pages: ['page1', 'page2', 'page3'] // 定义滚动页面的组件名称
    }
  }
}

For each scrolling page, we need to create the corresponding .vue file in the pages directory and export a component. In the component, you can customize the layout and content of the scroll page.

3. Achieve scrolling effect

In order to achieve the full-screen scrolling effect, we need to monitor the user's sliding gesture and switch pages accordingly. In uniapp, you can use events such as touchstart, touchmove, and touchend to monitor the user's sliding gestures.

First, add the @touchstart event to the full-screen container to monitor the user's sliding start operation and record the starting position and time of the user's sliding.

<view class="full-screen-container" @touchstart="onTouchStart($event)">

methods: {
  onTouchStart(event) {
    this.startY = event.touches[0].clientY; // 记录起始位置
    this.startTime = Date.now(); // 记录起始时间
  }
}

Then, add the @touchmove event to the full-screen container to monitor the user's operations during sliding and update the scrolling position of the page in real time.

<view class="full-screen-container" @touchstart="onTouchStart($event)" @touchmove="onTouchMove($event)">

methods: {
  onTouchMove(event) {
    if (this.isScrolling) return; // 如果正在滚动，则不再处理滑动
    var currentY = event.touches[0].clientY;
    var distance = currentY - this.startY; // 计算滑动距离
    var duration = Date.now() - this.startTime; // 计算滑动时间

    if (duration < 300 && Math.abs(distance) > 20) {
      // 如果滑动时间小于300毫秒且滑动距离大于20像素，则认为是用户触发了滚动操作
      this.isScrolling = true; // 标记为正在滚动

      // 根据滑动方向切换页面
      if (distance < 0) {
        this.nextPage();
      } else {
        this.prevPage();
      }
    }
  }
}

Finally, the methods to implement page switching are nextPage() and prevPage(). In these two methods, we need to call uniapp's API to implement the scrolling animation of the page.

methods: {
  nextPage() {
    uni.pageScrollTo({
      scrollTop: uni.upx2px(this.currentPage * this.screenHeight),
      duration: 300,
      complete: () => {
        this.isScrolling = false; // 完成滚动后，取消滚动标记
        this.currentPage++; // 切换到下一页
      }
    });
  },
  prevPage() {
    uni.pageScrollTo({
      scrollTop: uni.upx2px((this.currentPage - 2) * this.screenHeight),
      duration: 300,
      complete: () => {
        this.isScrolling = false;
        this.currentPage--;
      }
    });
  }
}

In this way, we have completed the code that uses uniapp to achieve the full-screen scrolling effect. By monitoring the user's sliding gestures, switching pages accordingly, and implementing scrolling animation when switching pages, a full-screen scrolling effect is achieved.

Summary

This article introduces the specific steps of using the uniapp framework to achieve the full-screen scrolling effect, and gives detailed code examples. I hope this article can help developers quickly achieve full-screen scrolling effects and enhance user interaction and experience in mobile application development.

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