How to implement picture browsing function in Uniapp

As times change, images and photos have become an indispensable part of our lives. Therefore, developing a picture browsing application based on the Uniapp platform has become a very necessary and popular option. In this article, we will introduce how to implement image browsing in Uniapp.

1. Prerequisite knowledge

First of all, before starting Uniapp’s image browsing operation, you need to understand the following concepts: front-end development (including HTML, CSS and JavaScript), Vue.js (especially Vue components) and Uniapp.

Secondly, you need a Uniapp project, which can be created using Hbuilder X.

2. Install uni-simple-router

In order to browse pictures, you need to install uni-simple-router, which is a routing manager that can make your operation more convenient. You only need to run the following command in the terminal of Hbuilder To do this, you need to create a Vue component, let's call it "ImageView".

This component includes the following content:

1. The list contains the image path.

2. When an image is clicked, the ID of the image should be stored in local storage and navigated to the "ImageViewDetail" component.

The following is a similar implementation example:

npm install uni-simple-router --save

4. Implement image browsing

In order to implement image browsing, you need to create a new Vue named "ImageViewDetail" components. The component should include the following:

1. Get the image ID stored in local storage.

2. When the component is mounted, use "uni-simple-router" to obtain image data.

Click the 'X' button in the image browser view or use the back button to close the browser view.

The following is an example of a similar implementation:

3. <template>
     <view class="container">
       <view v-for="(item, index) in imgUrlList" :key="index" >
         <image :src="item.path" mode="aspectFit" lazy-load @click="showImage(item.picID)"></image>
       </view>
     </view>
   </template>
   
   <script>
     export default {
       data() {
         return {
           imgUrlList: [
             { path: 'http://pic1.jpg', picID: 1},
             { path: 'http://pic2.jpg', picID: 2},
             { path: 'http://pic3.jpg', picID: 3}
           ]
         }
       },
       methods: {
         showImage(id) {
           uni.setStorageSync('__imageID__', id)
           uni.navigateTo({ url: 'ImageViewDetail.vue' })
         }
       }
     }
   </script>

5. Test results

Now, you have completed the Uniapp image browsing operation. You just need to build and run your Uniapp project and click on the image you want to view to open the image browser view.

6. Conclusion

In this article, we introduced how to use Uniapp and uni-simple-router to implement an image browser based on Vue.js and Uniapp platform. With this app you can easily create an app containing an image list and image browser and use it on your mobile device. While this example is not very complex, it shows how easily UniApp can implement an image browser and gives developers more options.

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