Implementation Guide for UniApp to Implement Image Carousel and Scroll Notification

UniApp is a cross-platform development framework that can quickly develop applications that support both iOS and Android. In mobile application development, image carousels and scrolling notifications are common functions. This article will introduce how to use UniApp to implement these two functions, and attach code examples.

1. Picture carousel implementation guide

Picture carousel is a common function in mobile applications. Multiple pictures can be displayed by sliding the screen or automatically switching pictures. The following are the steps to use the UniApp framework to implement image carousel:

Step 1: Install the uni-swiper plug-in

Search and install the uni-swiper plug-in in the UniApp plug-in market, which provides Implement the function of image carousel.

Step 2: Introduce the uni-swiper plug-in

Introduce the uni-swiper plug-in into the page that needs to use image carousel. The example is as follows:

<template>
  <view>
    <swiper :indicatorDots="true" :autoplay="true" interval="3000" duration="500">
      <block v-for="(item, index) in imgList" :key="index">
        <swiper-item>
          <image :src="item"></image>
        </swiper-item>
      </block>
    </swiper>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        imgList: [
          'https://example.com/image1.jpg',
          'https://example.com/image2.jpg',
          'https://example.com/image3.jpg'
        ]
      }
    }
  }
</script>

In the above code , the swiper component is used to wrap the pictures that need to be rotated, and the swiper-item component is used to wrap each picture. The indicatorDots attribute indicates whether to display indicator dots, the autoplay attribute indicates whether to automatically play, the interval attribute indicates the switching interval between pictures, duration Property represents the animation time of the switch. The v-for directive is used to loop through the image list, and the :src attribute is used to set the URL of each image.

2. Scroll Notification Implementation Guide

Scroll notification is a function that scrolls text content and can be used to display important messages or announcements. The following are the steps to use the UniApp framework to implement rolling notifications:

Step 1: Install the uni-notice-bar plug-in

Search and install the uni-notice-bar plug-in in the UniApp plug-in market. The plug-in provides the function of implementing rolling notifications.

Step 2: Introduce the uni-notice-bar plug-in

Introduce the uni-notice-bar plug-in into the page where scrolling notifications are required. The example is as follows:

<template>
  <view>
    <notice-bar :text="noticeText" :scrollable="true" :wrapable="false" :delay="2000" :speed="50"></notice-bar>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        noticeText: '这是一条滚动通知的示例文字'
      }
    }
  }
</script>

In the above code, the notice-bar component is used to display scrolling notifications, the text attribute is used to set the content of the notification, the scrollable attribute indicates whether scrolling is possible, # The ##wrapable attribute indicates whether to wrap the display, the delay attribute indicates the delay time to start scrolling, and the speed attribute indicates the scrolling speed.

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