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