Flutter:将数据从TabBarView(StatefullWidgets)发送回主支架

本文介绍了Flutter:将数据从TabBarView(StatefullWidgets)发送回主支架的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想创建一个带有标签的应用程序以获取用户输入.问题是，不同的选项卡获得不同的输入，但是我必须收集数据库的输入.我的主意是，主要的Scaffhold会收集所有Tabs的输入并将其写入数据库中！我的问题是，我不知道将数据从选项卡(另一个文件中的statefullWidget)发送到父类(Scaffold)还是从那里运行函数！

I want to create an App with Tabs to get the users input. The Problem is, that the different Tabs get different inputs, but i have to collect the inputs for the Database. My idea her was, that the main Scaffhold collects the inputs from all Tabs and write it in a database! My Problem is, that i dont know to send data from the tab (statefullWidget in an other file) to the parent class (Scaffold) or run a function from there!

请帮助我，抱歉我的英语不好！

Please help me and sorry for my bad english!

乔纳斯(Jonas)

推荐答案

您可以传递一个 Function ，该函数可以随时调用.

You can pass a Function that can be called whenever you want.

MamaBear班

MamaBear class

... class _MamaBear extends State<MamaBear> { void hungryBear(String babyBear) { print("$babyBear is hungry"); } @override Widget build(BuildContext context) { return Scaffold( body: Container( child: Column(children: <Widget>[ BabyBear( "Mark", (babyBear) { hungryBear(babyBear); }, )])));}

BabyBear班

BabyBear class

class BabyBear extends StatefulWidget { final String babyBearName; final Function onBearAction; BabyBear(this.babyBearName, this.onBearAction); @override _BabyBear createState() => _BabyBear(); } class _BabyBear extends State<BabyBear> { @override Widget build(BuildContext context) { return Card( child: RaisedButton( child: Text("Mama I'm hungry"), onPressed: () { widget.onBearAction(widget.babyBearName); }), ); }

}