How uniapp realizes multi-terminal unified development

Uniapp is a framework based on vue.js, which can achieve one-time development and multi-end release, including H5, small programs, App and other platforms. This article will introduce how to use Uniapp to achieve multi-terminal unified development, and attach code examples.

1. Project creation and configuration

1. Create the Uniapp project in HBuilderX and select the target platform to be developed.
2. Configure the basic information of the App in the manifest.json file of the project, such as package name, version number, etc.
3. Configure the custom configuration of each platform of the project, such as the appid of the mini program, etc.

2. Development of components and styles
Uniapp supports the development of components and styles using vue.js. There will be some differences in styles and component performance on different platforms, but Uniapp has carried out Some adaptation processing.

1. Use flex layout for page layout, and you can use uni-grid and uni-flex components for rapid development.
2. Use the uni-icons component to display icons. uni-icons will automatically switch to the corresponding icon library according to the platform.
3. Use the uni-list component to implement list display. uni-list will automatically optimize the mini program to make the sliding smoother.
4. Use the uni-notice-bar component to achieve the marquee effect, which will automatically convert to a smoother display effect in the mini program.

3. Multi-terminal compatibility processing
Although Uniapp can achieve multi-terminal development, there will still be some differences between different platforms, and some adaptation processing is required.

1. For the mini program platform, conditional compilation can be used to modify some logic. For example, in the onLoad life cycle, it is judged whether some specific operations need to be performed based on the current platform.

   onLoad() {
     #ifdef MP-ALIPAY
    console.log('支付宝小程序')
     #endif
   
     #ifdef MP-WEB
    console.log('微信小程序')
     #endif
   }

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2. For the App platform, you can configure the App’s plug-in reference and permission management in manifest.json, and you can use APIs provided by Uniapp such as uni.request and uni.showToast to make network requests and pop-up windows. operate.
3. For the H5 platform, you can use the nvue component of uni-app for optimization. For example, using nvue's list component to replace uni-list can improve the rendering and sliding effects of the page.

4. Data processing and sharing

1. Using vuex for global state management, you can share data between different pages and components to achieve responsive updates of data.

2. Use uniapp's life cycle function to initialize and destroy data, and perform different operations on different platforms.

   onLoad() {
     uni.request({
    url: 'https://api.example.com/data',
    success: (res) => {
      this.data = res.data
    }
     })
   },
   onUnload() {
     // 在小程序上需要手动销毁数据
     #ifdef MP
    this.data = null
     #endif
   }

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5. Packaging and publishing
Uniapp provides one-click packaging and publishing functions, which can directly compile the code into a mini program or App installation package for distribution. For specific operations, please refer to the official documentation.

Summary
By using Uniapp, we can achieve the goal of once development and multi-end release, which greatly improves development efficiency and code reusability. However, some adaptation processing needs to be carried out for different platforms during the development process to ensure a good user experience on different platforms.

The above is a brief introduction and code examples of how Uniapp achieves multi-terminal unified development. I hope it will be helpful to readers.

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