Flutter 开发遇到的问题

1. AnimationController has lost it's vsync

在升级 Flutter 1.22.1 以后发现 AnimationController 的 required 参数 vsync 传进去以后报错，其实根本不提示这个参数，查了下资料在 Flutter 的项目 AnimationController has lost it's vsync 中有人提到，目前解决办法如下

• change minimum sdk to 2.8
• run flutter upgrade
• run flutter pub get
• run flutter clean
• restart IDE

跟踪 Flutter 的稳定版本

flutter channel stable

然后升级就好

flutter upgrade