MIT官方已升级至2.70版本，中文网待测试并升级相关特性

App Inventor 2

2.70 版本主要更新内容：

Features:

• Add a Japanese translation
• Update the Spanish translation
• Make the Sharing component respect DefaultFileScope when sharing relative path files (@arjuninv)
• Add TextChange event, MoveCursor methods, and HintColor property to TextBox and related components (@gordonlu310)
• Show translated help in property help widgets
• Add CircularProgress and LinearProgress components from Kodular (@barreeeiroo)
• Add Theme and Toolkit properties to the new project dialog (@jennet-zamanova)
• Add a Trendline component to visualize linear, quadratic, exponential, and logarithmic trends in ChartData2D components
  

Bug Fixes:

• Fix a bug in removing an item from a listview resulting in bad indices (@timfoden)
• Fix a bug that could result in an infinite loop for certain TTS engines (@XomaDev)
• Improve documentation about special regex characters in replace block (@JustinFrost47)
• Improve description of the DataFile component (@gordonlu310)
• Fix a font size issue for checkbox and switch in the designer (@gordonlu310)
• Fix a CSS issue that made the PasswordTextBox look larger in the Designer than it should be
• Fix an issue where the project properties dialog would not open when using a non-English locale
  

Internal Changes:

• Deprecate the Twitter component (@gordonlu310)
• Fix a duplicated translation file causing issues on macOS
  

https://appinventor.mit.edu/ai2/ReleaseNotes

待合并支持的大概有：
1、TextBox 新增了文本变更事件，这个一直是一个槽点，这次终于修复。
2、2个内置进度条组件。
3、其他组件的优化及bug修复。
4、去掉Twitter 组件。
5、新建项目项目时，可以指定主题和级别（初学者、专家等）
6、Show translated help in property help widgets（已支持）

近期将进行新特性合并及功能测试，你最期待哪个功能，欢迎回复讨论。

zqp2013

第一个，期待(✧∀✧)