Question

我正在使用react导航库，特别是${server_2_details}

https://reactnavigation.org/docs/en/params.html上的文档介绍了如何使用堆栈导航器在路由之间传递参数，而Im使用标签导航器，我找不到跳出来的任何东西来解释如何在标签导航设置中进行操作

我在App.js中的标签导航器是

createBottomTabNavigator

watchList路由包含一个名为symbol的json文件，我希望将其传递到alertScreen.js中的警报路由

const BottomTabMenu = createBottomTabNavigator (
  {
    WatchList: { screen: WatchListScreen },
    Alerts: { screen: AlertsScreen },
    Analytics: { screen: AnalyticsScreen },
    Settings: { screen: SettingsScreen },
  },
  {
    initialRouteName: 'WatchList',
    defaultNavigationOptions: ({ navigation }) => ({
      tabBarIcon: ({ focused, horizontal, tintColor }) => {
        const { routeName } = navigation.state;
        let IconComponent = Ionicons;
        let iconName;
        if (routeName === 'WatchList') { iconName = 'md-list'; }  
        if (routeName === 'Alerts') { iconName = 'md-alert'; }  
        if (routeName === 'Analytics') { iconName = 'md-analytics'; }  
        if (routeName === 'Settings') { iconName = 'md-settings'; }

        return <IconComponent name={iconName} size={25} color={tintColor} />;
      },
    }),
    tabBarOptions: {
      activeTintColor: 'tomato',
      inactiveTintColor: 'gray',
    },
  }
);
const AppContainer = createAppContainer(BottomTabMenu);

ALERTSSCREEN.JS

export default class WatchListScreen extends React.Component {

    constructor(props) {
        super(props)
        this.state = {
            symbols: [],
        }
    }  
LOTS OF OTHER STUFF

根据文档，我需要传递数据的行将是这样的

export default class AlertsScreen extends React.Component {

    render() {
        //according to the docs, this is how to receive in the props
        const { navigation } = this.props;
        const jsonWatchList = navigation.getParam('jsonWatchList', '[]');

        return (
        <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
            <Text>blah blah blah</Text>
        </View>
        );
    }
}

唯一的问题是我不知道应该去哪里。

Answer 1

在您的链接（https://reactnavigation.org/docs/en/params.html）中有详细记录。它说明了路线之间如何传递参数。使用stackNavigator还是createBottomTabNavigator

都没关系

按您希望的方式传递参数：

this.props.navigation.navigate('jsonWatchList', { jsonWatchList: [lots of data here], });

在另一个屏幕上，像这样获得它们：

const data = this.props.navigation.getParam('jsonWatchList');

如何使用Tab Navigator NOT堆栈导航器将参数传递给路由

1 个答案: