How Does React Native Work?

The idea of writing mobile applications in JavaScript feels a little odd. How is it possible to use React in a mobile environment? In order to understand the technical underpinnings of React Native, first we’ll need to recall one of React’s features, the Virtual DOM.

In React, the Virtual DOM acts as a layer between the developer’s description of how things ought to look, and the work done to actually render your application onto the page. To render interactive user interfaces in a browser, developers must edit the browser’s DOM, or Document Object Model.

Let’s come to React Native now. Instead of rendering to the browser’s DOM, React Native invokes Objective-C APIs to render to iOS components, or Java APIs to render to Android components. This sets React Native apart from other cross-platform app development options, which often end up rendering web-based views.

This is all possible because of the “connector,” which provides React with an interface into the host platform’s native UI elements. React components return markup from their render function, which describes how they should look. With React for the Web, this translates directly to the browser’s DOM. For React Native, this markup is translated to suit the host platform, so a <View> might become an Android-specific TextView.

React Native currently supports iOS and Android. Because of the abstraction layer provided by the Virtual DOM, React Native could target other platforms, too—someone just needs to write the connector.

Rendering Lifecycle

If you are used to working in React, the React lifecycle should be familiar to you. When React runs in the browser, the render lifecycle begins by mounting the React components.

After that, React handles the rendering and re-rendering of the component as necessary.

For the render phase, the function returns HTML markup from a React component’s render method, which React then renders directly into the page.

For React Native, the lifecycle is the same, but the rendering process is slightly different, because React Native depends on the bridge. The bridge translates JavaScript calls and invokes the host platform’s underlying APIs and UI elements (i.e. in Objective-C or Java, as appropriate). Because React Native doesn’t run on the main UI thread, it can perform these asynchronous calls without impacting the user’s experience.

http://www.discoversdk.com/blog/how-react-native-works

React (Native) Rendering Lifecycle的更多相关文章

  1. [RN] 02 - Overview: React Native Practice of 50 lectures

    观看笔记:零基础 React Native 实战开发视频 50讲 本篇效果:RN入门,整体认识 基本原理 # 1 React到RN # 2 一个简单的例子 /** * Sample React Nat ...

  2. Xamarin vs React Native vs Ionic vs NativeScript: Cross-platform Mobile Frameworks Comparison

    CONTENTS Reading time: 14 minutes Cross-platform mobile development has long been a viable alternati ...

  3. React Native 中组件的生命周期

    概述 就像 Android 开发中的 View 一样,React Native(RN) 中的组件也有生命周期(Lifecycle).所谓生命周期,就是一个对象从开始生成到最后消亡所经历的状态,理解生命 ...

  4. React Native官方DEMO

    官方给我们提供了UIExplorer项目,这里边包含React Native的基本所有组件的使用介绍和方法. 运行官方DEMO步骤如下 安装react native环境 React Native项目源 ...

  5. React Native ——实现一个简单的抓取github上的项目数据列表

    /** * Sample React Native App * https://github.com/facebook/react-native */ 'use strict'; var React ...

  6. React Native For Android 架构初探

    版权声明:本文由王少鸣原创文章,转载请注明出处: 文章原文链接:https://www.qcloud.com/community/article/171 来源:腾云阁 https://www.qclo ...

  7. [React Native] Basic iOS Routing -- NavigatorIOS

    Inside the app component, we use NavigatiorIOS to render the compoent: class githubnotetaker extends ...

  8. [转] React Native Navigator — Navigating Like A Pro in React Native

    There is a lot you can do with the React Native Navigator. Here, I will try to go over a few example ...

  9. iOS 写给iOS开发者的React Native学习路线(转)

    我是一名iOS开发者,断断续续一年前开始接触React Native,最近由于工作需要,专职学习React Native也有一个多月了.网络上知识资源非常的多,但能让人豁然开朗.迅速学习的还是少数,我 ...

随机推荐

  1. asp.net core 和consul

    consul集群搭建 Consul是HashiCorp公司推出的使用go语言开发的开源工具,用于实现分布式系统的服务发现与配置,内置了服务注册与发现框架.分布一致性协议实现.健康检查.Key/Valu ...

  2. HDU校赛 | 2019 Multi-University Training Contest 6

    2019 Multi-University Training Contest 6 http://acm.hdu.edu.cn/contests/contest_show.php?cid=853 100 ...

  3. 【题解】Luogu P5301 [GXOI/GZOI2019]宝牌一大堆

    原题传送门 首先先要学会麻将,然后会发现就是一个暴力dp,分三种情况考虑: 1.非七对子国士无双,设\(dp_{i,j,k,a,b}\)表示看到了第\(i\)种牌,一共有\(j\)个\(i-1\)开头 ...

  4. Java学习:字符串概述与特点

    字符串概述与特点 java.lang.String类 代表字符串 API当中说:Java程序中的所有字符串字面值(如“abc“)都作为此类的实例实现.其实就是说:程序当中所用的双引号字符串,都是Str ...

  5. mvc企业微信开发全局配置

    protected void RegisterSenparcWork()     {         var isGLobalDebug = false;//设置全局 Debug 状态         ...

  6. 从0开始编写dapper核心功能、压榨性能、自己动手丰衣足食

    我偶然听说sqlsugar的性能比dapper强.对此我表示怀疑(由于我一直使用的dapper存在偏见吧),于是自己测试了sqlsugar.freesql.dapper发现他们的给我的结果是 sqls ...

  7. Redis常用配置和命令总结

    Redis(全称:Remote Dictionary Server 远程字典服务)是一个开源的使用ANSI C语言编写.支持网络.可基于内存亦可持久化的日志型.Key-Value数据库,并提供多种语言 ...

  8. 【转载】socket通信-C#实现tcp收发字符串文本数据

    在日常碰到的项目中,有些场景需要发送文本数据,也就是字符串,比如简单的聊天文字,JSON字符串等场景.那么如何如何使用SharpSocket来收发此类数据呢?其中要掌握的关键点是什么呢? 点击查看原博 ...

  9. 第一阶段:Java基础 1.JAVA开发介绍---2. JVM、JRE、JDK之间的关系

    JDK :英文名称(Java Development Kit),Java 开发工具包,是针对 Java 开发员的产品.jdk 是整个 Java 开发的核心,包括了Java运行环境JRE.Java工具和 ...

  10. Python面向对象封装案例

    01. 封装 封装 是面向对象编程的一大特点 面向对象编程的 第一步 —— 将 属性 和 方法 封装 到一个抽象的 类 中 外界 使用 类 创建 对象,然后 让对象调用方法 对象方法的细节 都被 封装 ...