Merge pull request #135 from Unity-Technologies/zxw/update_readme

Zxw/update readme

README-ZH.md

-# UIWidgets
+# UIWidgets 2.0 （preview）
 
 
 ## 介绍
 UIWidgets主要来自[Flutter](https://github.com/flutter/flutter)。但UIWidgets通过使用强大的Unity引擎为开发人员提供了许多新功能，显著地改进他们开发的应用性能和工作流程。
+
+UIWidgets 2.0是UIWidgets的最新版本，它主要着力于UI绘制相关的整体性能优化。经测试，UIWidgets 2.0在iPhone 6等部分机型上的帧率相对1.0版本可以取得10%左右的提升。如果因为各种原因您还需要使用UIWidgets 1.0，请在Releases中下载对应的包或者使用uiwidgets_1.0分支。
 
 #### 效率
 通过使用最新的Unity渲染SDK，UIWidgets应用可以非常快速地运行并且大多数时间保持大于60fps的速度。
    ```
 在unity的PackageManager中，选择添加添加local file。选中```/com.unity.uiwidgets```下的```package.json```。
 
-对于windows,请用在```com.unity.uiwidgets/Runtime/Plugins/x86_64```下的 ```libEGL.dll, libGLESv2.dll```替换编辑器中中相应文件
+对于windows,请用在```com.unity.uiwidgets/Runtime/Plugins/x86_64```下的 ```libEGL.dll, libGLESv2.dll```替换编辑器中相应文件
+
+#### 运行环境
+
+UIWidgets目前暂时只支持MacOS（Metal），iOS（Metal），Android（Armv7，OpenGLes）以及 Windows（Direct3D11）。我们后续会针对更广泛的运行环境进行适配，敬请期待。
 
 ## 入门指南
 
 首先，请打开或创建Unity项目并使用Unity编辑器打开它。
-
-然后打开Project Settings，转到Player部分并**将“UIWidgets_DEBUG”添加到Scripting Define Symbols字段中。**
-
-这样就启动了UIWidgets的调试模式。 在之后发布版本的时候清空这个字段。
 
 #### 二、 场景构建
 
 
 #### 五、如何加载图像？
 1. 将你的图像文件，如image1.png，放在StreamingAssets文件夹中。
-2. 使用Image.File（“image1.png”）加载图像。
+2. 使用Image.file("image1.png")加载图像。
-2. 使用Image.file（“loading1.gif”）加载gif图像。
+2. 使用Image.file("loading1.gif")加载gif图像。
 
 #### 六、在安卓上显示状态栏
 当一个Unity项目运行在Android设备上时，状态栏是默认隐藏且无法在编辑内进行调整的。

README.md

-# UIWidgets
+# UIWidgets 2.0 (preview)
 [中文](README-ZH.md)
 
 
 UIWidgets is mainly derived from [Flutter](https://github.com/flutter/flutter). However, taking advantage of
 the powerful Unity Engine, it offers developers many new features to improve their Apps
 as well as the develop workflow significantly.
+
+As the latest version, UIWidgets 2.0 aims to optmize the overall performance of the package. Specifically, a performance gain around 10% is observed on  mobile devices like iPhone 6 after upgrading to UIWidgets 2.0. However, if you still want to use the original UIWidgets 1.0, please download the archived packages from Releases or switch your working branch to uiwidgets_1.0.
 
 #### Efficiency
 Using the latest Unity rendering SDKs, a UIWidgets App can run very fast and keep >60fps in most times.
 
 for windows, please replace ```libEGL.dll, libGLESv2.dll``` in Editor from ones in ```com.unity.uiwidgets/Runtime/Plugins/x86_64``
 
+#### Runtime Environment
+
+Currently UIWidgets only supports MacOS(Metal), iOS(Metal), Android(Armv7, OpenGLes) and Windows(Direct3D11). More devices will be supported in the future.
+
 ## Getting Start
 
 #### i. Overview
 First of all, please open or create a Unity Project and open it with Unity Editor.
-
-And then open Project Settings, go to Player section and **add "UIWidgets_DEBUG" to the Scripting Define Symbols field.**
-This enables the debug mode of UIWidgets for your development. Remove this for your release build afterwards.
 
 #### ii. Scene Build
 A UIWidgets App is usually built upon a Unity UI Canvas. Please follow the steps to create a
 
 UIWidgets supports Gif as well!
 1. Put your gif files in StreamingAssets folder. e.g. loading1.gif.
-2. Use Image.asset("loading1.gif") to load the gif images.
+2. Use Image.file("loading1.gif") to load the gif images.
 
 #### Show Status Bar on Android
 Status bar is always hidden by default when an Unity project is running on an Android device.