React Navigation-this.props.navigation.state未定义

Question

使用：“ @ react-navigation / drawer”：“ ^ 5.4.0”，“ @ react-navigation / native”：“ ^ 5.1.4”，

App.js：

    import { createDrawerNavigator } from '@react-navigation/drawer';
    ...
    const Drawer = createDrawerNavigator();
    const DrawerRender = () => {
    return (
      <NavigationContainer>
        <Drawer.Navigator drawerContent={props => <DrawerContent {...props} />}>
          <Drawer.Screen name="Home" component={Home} />
          <Drawer.Screen name="Screen1" component={Screen1} options={{unmountOnBlur: true, gestureEnabled: false}} />
          <Drawer.Screen name="Screen2" component={Screen2} options={{unmountOnBlur: true, gestureEnabled: false}} />
        </Drawer.Navigator>
      </NavigationContainer>
    );}

从屏幕1：

    navigateToPage = page_id => {
      this.closeCommentScreen();
      this.reopenModal = true;
      this.props.navigation.navigate('Screen2', {'page_id': 'testing'});
    }

在屏幕上2：

    export default class Screen2 extends React.Component {

    constructor(props) {
       super(props);
    }
    componentDidMount() {
       let id = this.props.navigation.state.params.page_id
       ...

我尝试打印“ this.props.navigation”，并且它总是返回空字典{}，因此params是未定义的。

我在做什么错？

Answer 1

是this.props.route.params

请参见升级指南https://reactnavigation.org/docs/upgrading-from-4.x#separate-route-prop