UniApp implements React Native application development and online process analysis

UniApp implements analysis of the development and launch process of React Native applications

Introduction:
React Native is an open source framework based on React that can write cross-platform applications in JavaScript. Its goal is to build native applications by using the best of JavaScript and React. However, React Native is not the only option, we can also use UniApp to develop cross-platform applications. UniApp is an open source framework based on Vue.js that can be used to develop a variety of applications, including Web, iOS, Android, applets, etc. This article will introduce how to use UniApp to implement the development and launch process of React Native applications, and attach code examples.

1. Development environment setup

1. Install Node.js and Npm

Make sure Node.js and Npm are installed. You can download and install the latest version on the official website.

2. Install HBuilderX

HBuilderX is an integrated development environment that provides a wealth of functions and plug-ins. You can download and install the latest version on the official website.

3. Create UniApp Project

Open HBuilderX and select New Project. Select Uni-APP in the project type and fill in the project name, directory, Appid and other information.

4. Configuration framework

Find the manifest.json file in the project root directory, open and modify the "app-plus" node, and change the "modules" node Three modules "uniWebView", "uniBackgroundAudio" and "uniMedia" are added. The sample code is as follows:

"app-plus": {
"modules": {
"uniWebView": {
"webviewId": true
},
"uniBackgroundAudio": {},
"uniMedia": {}
}
}

2. React Native component conversion

In UniApp, we can use Vue.js to write components of React Native applications. UniApp provides some built-in components that can be used directly. At the same time, we can also convert components in React Native into corresponding UniApp components.

1. Routing component conversion

In React Native, we use React Navigation to implement route navigation. In UniApp, we can use the uni-simple-router plug-in to achieve similar functionality. First, install the uni-simple-router plug-in in the project root directory:

npm install --save uni-simple-router

Then, introduce and use the plug-in in the entry file main.js:

import Vue from 'vue'
import App from './App'
import router from './router'

// 全局注册UniApp组件
// ...

// 使用uni-simple-router插件
import router from '@/router'
Vue.use(router)

const app = new Vue({
  ...App
})
// #ifdef H5
router.beforeEach((to, from, next) => {
  if (to.query.token) {
    uni.setStorageSync('token', to.query.token)
  }
  next()
})
// #endif
app.$mount()

2. Network request component conversion

In React Native, we use Fetch API or Axios to make network requests. In UniApp, we can use uni.request to achieve similar functionality. The sample code is as follows:

uni.request({
  url: 'https://api.example.com/users',
  method: 'GET',
  success: (res) => {
    console.log(res.data)
  },
  fail: (err) => {
    console.error(err)
  }
})

3. UI component conversion

In React Native, we use third-party UI component libraries to build the application's interface. In UniApp, we can use third-party UI component libraries such as uni-ui or Ant Design Vue to achieve similar functions. First, install uni-ui in the project root directory:

npm install @dcloudio/uni-ui

Then, introduce and use the plug-in in main.js:

import Vue from 'vue'
import App from './App'
import store from './store'
import { Button, List, Cell } from 'uni-ui'

Vue.component('Button', Button)
Vue.component('List', List)
Vue.component('Cell', Cell)

const app = new Vue({
  store,
  ...App
})
app.$mount()

3. Compilation and debugging

1. Compile Project

Open the UniApp project in HBuilderX and choose to run it on the corresponding platform. HBuilderX automatically compiles and runs the application on the simulator or device.

2. Debug Project

UniApp provides some tools and functions to help developers debug applications. For example, you can use Chrome DevTools to debug the web portion of your application. At the same time, you can also use the Uni-Stats plug-in to view application performance indicators.

4. Application online process

1. Register a developer account

Before going online in the app store, you need to register a developer account first. According to the requirements of the platform to be published, select an appropriate developer account to register.

2. Prepare application materials

Before the application goes online, you need to prepare some application materials, such as application icons, screenshots, application descriptions, etc. Depending on the app store, the required materials may vary.

3. Build the application package

Open the UniApp project in HBuilderX and select the corresponding platform to build. HBuilderX will automatically build the application package.

4. Submit for app store review

Submit the built app package to the corresponding app store for review according to the requirements of the platform to be released.

5. Waiting for the review result

After submitting the application for app store review, you need to wait patiently for the review result. The speed and results of the review depend on the app store's review process and standards.

6. App goes live

Once it passes the App Store review, your app will go live. Users can search for and download your app in the corresponding app store.

Summary:
The development and launch process of React Native applications through UniApp can help us build cross-platform applications more efficiently. UniApp provides a wealth of functions and plug-ins to meet our various needs in React Native development. By rationally using UniApp's conversion methods and tools, we can quickly migrate React Native applications to UniApp and achieve the goal of once development and multi-platform operation. I hope this article will help you understand the UniApp implementation of React Native development and launch process.

Reference materials:

1. UniApp official documentation: https://uniapp.dcloud.io/
2. React Native official documentation: https://reactnative.dev /
3. Uni-Stats plug-in: https://ext.dcloud.net.cn/plugin?id=123

Appendix: Sample code

import React from 'react'
import { View, Text, StyleSheet } from 'react-native'

const App = () => {
  return (
    <View style={styles.container}>
      <Text style={styles.text}>Hello, UniApp</Text>
    </View>
  )
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
  text: {
    fontSize: 20,
    fontWeight: 'bold',
  },
})

export default App

以上是UniApp实现React Native应用的开发与上线流程解析，通过UniApp，我们可以更便捷地开发和上线React Native应用。相信在未来，UniApp将会成为跨平台应用开发的主要选择之一。

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