随着项目深入学习flutter
1.flutter实战5:异步async、await和Future的使用技巧
2.Future.then函数:https://segmentfault.com/a/1190000017348507
3.flutter中event_bus实现原理
4.flutter 二维码
https://juejin.im/post/5b700d2d6fb9a0098b251462