Flutter中使用TabBar遇到的坑

1.对TabController的监听在点击Tab后会执行两次

 

每点击一次,监听都有两次回调

解决:

            

对indexIsChanging进行判断

 

2.使用SingleTickerProviderStateMixin报错

    根据官方文档使用(自己也敲了些其他代码),但是报了个错

I/flutter ( 9971): A SingleTickerProviderStateMixin can only be used as a TickerProvider once. If a State is used for

I/flutter ( 9971): multiple AnimationController objects, or if it is passed to other objects and those objects might

I/flutter ( 9971): use it more than one time in total, then instead of mixing in a SingleTickerProviderStateMixin, use

I/flutter ( 9971): a regular TickerProviderStateMixin.

    解决:

             将SingleTickerProviderStateMixin换成TickerProviderStateMixin