使用navigation.goBack() 时如何将数据发送回前一个场景?

问题描述

我有屏幕 1，我使用以下方法导航到屏幕 2:

I've got screen 1 from which I navigate to screen 2 using:

navigation.navigate('Screen2')

从这个屏幕，我想转到上一个，很简单:

From this screen, I would like to go to the previous one, which simple:

navigation.goBack()

但是我想知道如何将一些数据传回 Screen1?类似的东西不起作用 navigation.goBack({ myData: 'something' }) 所以我想知道一般推荐的方法是什么?

However I'm wondering how can I pass some data back to Screen1? Something like wouldn't work navigation.goBack({ myData: 'something' }) so I'm wondering what is the recommended way to do this in general?

推荐答案

你可以通过两种方式解决:

You can solve it with 2 ways :

1 : 使用导航方式

当您通过导航调用该屏幕时传递一个方法:

Pass a method when you are calling that screen through navigation :

this.props.navigation.navigate('Screen2', {
  onGoBack: this.refresh,
});

refresh=(data)=> {

}

当你按下返回键时，像

this.props.navigation.state.params.onGoBack('123');
this.props.navigation.goBack();

2 : 使用 redux store

如果您在应用程序中使用 redux，只需在用户按下后退按钮时更新 redux store，并在上一屏幕中获取 store 值.

If you are using redux in your application, just update redux store whenever user presses back button, and get store value in previous screen.

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