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代码缺少实现 ChangeNotifier 类 #4

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jsonz1993 opened this issue Oct 17, 2019 · 1 comment

jsonz1993 commented Oct 17, 2019 •

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看7.3 跨组件状态共享（Provider）的时候发现跑不了，来跑代码，拉下来之后发现项目里面好像缺少实现 ChangeNotifier 类

Undefined class 'ChangeNotifier'.
Try changing the name to the name of an existing class, or creating a class with the name 'ChangeNotifier'.

基于这个commit的最新代码 commit

The text was updated successfully, but these errors were encountered:

bdpqchen commented Dec 30, 2019

可能是版本的太低的问题, 我的是有的, 在包 flutter/packages/flutter/lib/src/foundation 下,
我的版本是
environment:
sdk: ">=2.1.0 <3.0.0"

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