通过CreateAppContainer传递道具

Question

我正试图通过AppContainer传递道具。我能够通过其他组件传入，但我无法弄清楚如何通过createAppContainer发送道具

在App.js中：

render() {
    return (
        this.state.isLoggedIn ? <DrawerNavigator /> : 
<SignedOutNavigator handler={this.saveUserSettings} />
    )
}

在SignedOutNavigator中：

import React from "react";
import { View, Text } from "react-native";
import { createStackNavigator, createAppContainer } from "react-navigation";
import LoginScreen from "../screens/LoginScreen";

const SignedOutNavigator = createStackNavigator({
    Login: {
        // screen: LoginScreen
        screen: props => <LoginScreen screenProps={value => {
            // I need to access props from here
            // like this.props.handler(value)
        }} />,
        navigationOptions: ({ navigation }) => ({
            header: null,
        }),
    }
});

export default createAppContainer(SignedOutNavigator);

Answer 1

你必须在screenProps下调整道具的范围才能在screen级别访问它。

// App.js
<AppNavigator
  screenProps={{
    handler: () => {},
    hello: "World"
  }}
/>

// Navigator.js
const StackNavigator = createStackNavigator({
  Login: {
    screen: ({ screenProps, navigation }) => {
      screenProps.handler();

      // ...
    },
  },
})

Answer 2

好的，我在Samuel Vaillant的帮助下完成了这个工作。我不得不做一些修改。

我的App.js：

render() {
        return (
            this.state.isLoggedIn ? <DrawerNavigator /> : <SignedOutNavigator
                screenProps={{
                    handler: (settings) => { this.saveUserSettings(settings) }
                }}
            />
        )
    }

我的SignedOutNavigator：

import React from "react";
import { View, Text } from "react-native";
import { createStackNavigator, createAppContainer } from "react-navigation";
import LoginScreen from "../screens/LoginScreen";

const SignedOutNavigator = createStackNavigator({
    Login: {
        // screen: LoginScreen
        screen: screenProps => <LoginScreen screenProps={value => {
            screenProps.screenProps.handler(value)
        }} />,
        navigationOptions: ({ navigation }) => ({
            header: null,
        }),
    }
});

export default createAppContainer(SignedOutNavigator);