flutter - initState没有被调用(initState not getting called)

Question

I open PageB from PageA using this code

(我使用此代码从PageA打开PageB)

 Navigator.pushNamed(context, PageB.ROUTE);

In pageB, when I press the back device button, it will return to pageA, but the initState in PageA is not getting called.

(在pageB中，当我按后退设备按钮时，它将返回到pageA，但是没有调用initState中的initState。)

Why?

(为什么？)

I want it call a function once it is back from pageB.

(我希望它从pageB返回时调用一个函数。)

  ask by John Joe translate from so

Answer 1

You can call PageA from PageB like this,

(您可以像这样从PageB调用PageA ，)

Navigator.of(context).pushReplacementNamed('PageA');
OR
Navigator.of(context).pushNamedAndRemoveUntil('PageA', (Route<dynamic> route) => false);

I have found an interesting blog about navigators

(我发现了一个有关导航员的有趣博客)