# 前言

为更好的学习Flutter，特地将Flutter的学习从零整理及总结成本书，方便大家的快速学习！

其他权威网站：[Flutter中文网](https://flutterchina.club/)、[Flutter实战书籍](https://book.flutterchina.club)

## 主流跨平台语言对比

主流跨平台语言(Flutter和RN、Weex)之间的对比：

![主流跨平台语言对比](https://3320264277-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LVSU1YOqp0suas4rOgR%2F-LVmK6J0OWPnjWfRJhIf%2F-LVmK80dIOI3ZTrgHTb_%2F%E4%B8%BB%E6%B5%81%E8%B7%A8%E5%B9%B3%E5%8F%B0%E8%AF%AD%E8%A8%80%E5%AF%B9%E6%AF%94.jpg?generation=1547032635475282\&alt=media)

* 渲染性能

和RN和Weex将javascript转化为原生控件渲染不同，Flutter完全挣脱了原生控件的“束缚”，如下图所示，Flutter使用了分层架构，分为Framework和Engine两个部分，其中Framework层提供各种基础组件库，包括各种Widget，动画等，Engine层则完全由C和C++实现，使用Skia进行渲染（对！就是chrome用的那个图形渲染框架），官方宣称可以达到原生app的渲染性能。

![Flutter结构](https://3320264277-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LVSU1YOqp0suas4rOgR%2F-LVmK6J0OWPnjWfRJhIf%2F-LVmK80fSYlDAsqF2OEx%2FFlutter%E7%BB%93%E6%9E%84.jpg?generation=1547032634695252\&alt=media)

* Google新操作系统Fuchsia(被认为是Android的继任者)也使用Flutter作为其UI框架，今后的发展不可限量。


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