https://github.com/cgspine/Recos

Typescript to compose and swiftUI
https://github.com/cgspine/Recos

Last synced: 3 months ago
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Typescript to compose and swiftUI

• Host: GitHub
• URL: https://github.com/cgspine/Recos
• Owner: cgspine
• Created: 2021-05-17T05:16:26.000Z (over 3 years ago)
• Default Branch: master
• Last Pushed: 2023-04-23T13:55:11.000Z (over 1 year ago)
• Last Synced: 2024-07-13T04:33:01.436Z (4 months ago)
• Language: Swift
• Homepage:
• Size: 6.86 MB
• Stars: 33
• Watchers: 7
• Forks: 4
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

• awesome-github-star - Recos

README

        
![Recos](imgs/logo.png)

# Recos - experimental ts/jsx to Android Compose/SwiftUI compiler

This repository contains an early prototype of Recos, an experimental compiler, which would compile tx/jsx into Android Jetpack Compose and iOS SwiftUI.

For a long time, many technologies have been introduced to build cross-platform mobile apps using single codebase, and React-Native is the most popular framework in this area. However, React-Native has some kind of performance issues and relatively higher memory usage.

The main goal of Recos is to help us building high performance cross-platform mobile apps in a declarative manner.

## Recos overview

![Design](imgs/design.jpeg)

## Getting started with Recos

Before starting this 101 tutorial, make sure our system have installed [node](https://nodejs.org/en/), and suppose we are using macOS, we may consider install it via [brew](https://formulae.brew.sh/formula/node):

```

brew install node

npm install getopts --save

```

For the Android side, in order to make Jetpack Compose works, we must use [Android Studio Preview version](https://developer.android.com/studio/preview) in this moment.

Setting up the development environment is out of the scope of this tutorial, for more information, please read the latest official docs from [Facebook](https://reactnative.dev/docs/environment-setup) and [Google](https://developer.android.com/studio/preview/install-preview).

Using your convenient tool to write the first React app, we will use [TypeScript](https://reactnative.dev/docs/typescript) in this case and named it `hello.tsx`:

```typescript

function Item1(item, onItemClick) {

    const onClick = useCallback(() => {

        onItemClick(item)

    })

    return 偶数：{item.name}, {item.count}

}

function Item2(item, onItemClick) {

    const onClick = useCallback(() => {

        onItemClick(item)

    })

    return 奇数：{item.name}, {item.count}

}

function HelloWorld(current) {

    const [data, setData] = useState([])

    useEffect(() => {

        let ret = []

        for (let i = 0; i < 1000; i++) {

            ret.push({

                name: 'item' + i,

                index: i,

                count: 0

            })

        }

        setData(ret)

    }, [current])

    let render = function (i) {

        let item = data[i]

        if (item.index % 2 == 0) {

            return Item1(item, (it) => {

                it.count = it.count + 1

                setData(data)

            })

        } else {

            return Item2(item, (it) => {

                it.count = it.count + 2

                setData(data)

            })

        }

    }

    return Hello World!

}

```

The next step would be use `js/cli.js` to compile it into a bundle file:

```shell

node cli.js -s hello.tsx -o hello.bundle

```

Put the output file `hello.bundle` into Android project's `app/src/main/assets`, compile the Android app and we will see:



The example for iOS: