Reactjs 在Redux+中传递参数；反应本机+；反应导航器

我正在尝试将参数从MenuScreen.js传递到ProfileScreen.js。我是一个新的反应本机和Redux。使用react navigation进行导航，我可以用一个按钮推到新屏幕

使用

按钮onPress={（）=>dispatch（导航操作.导航（{routeName:'Profile'，params:{user:'baz'}））} title=“Profile”/>

我可以传递参数，但我不知道如何在配置文件屏幕上访问它

使用

this.props.navigation.state.params

在ProfileScreen.js中，给出了一个错误

这是导航

没有定义

下面是代码

MainScreen.js

const MainScreen = ({ dispatch }) => {

return (
<View>

  <Button
    onPress={() =>
      dispatch(NavigationActions.navigate({ routeName: 'Profile', params: { user: 'baz' } }))}
    title="Profile"
  />
</View>
);
};

MainScreen.propTypes = {
dispatch: PropTypes.func.isRequired,
};

MainScreen.navigationOptions = {
title: 'Main',
}; 

const mapStateToProps = state => ({

});

export default connect(mapStateToProps)(MainScreen);

const params  = this.props.navigation.state.params;

const ProfileScreen = () => (
  <View style={styles.container}>
  <Text style={styles.welcome}>
   {params}
  </Text>
  </View>
);

ProfileScreen.navigationOptions = {
 title: 'Profile',
};

export default ProfileScreen;

import { AppNavigator } from '../navigators/AppNavigator';

const initialNavState = AppNavigator.router.getStateForAction(
  AppNavigator.router.getActionForPathAndParams('Main')
);

function nav(state = initialNavState, action) {
  let nextState;
  switch (action.type) {
    default:
      nextState = AppNavigator.router.getStateForAction(action, state);
      break;
  }
  return nextState || state;
}

const AppReducer = combineReducers({
  nav,
});

export default AppReducer;

import MainScreen from '../components/MainScreen';
import MainScreen from '../components/MainScreen';
import ProfileScreen from '../components/ProfileScreen';

export const AppNavigator = StackNavigator({
 Main: { screen: MainScreen },
 Profile: { screen: ProfileScreen },
});

const AppWithNavigationState = ({ dispatch, nav }) => (
  <AppNavigator navigation={addNavigationHelpers({ dispatch, state: 
  nav })} /> 
);

AppWithNavigationState.propTypes = {
   dispatch: PropTypes.func.isRequired,
   nav: PropTypes.object.isRequired,
};

const mapStateToProps = state => ({
 nav: state.nav,
});

export default connect(mapStateToProps)(AppWithNavigationState);

class NavChecks extends React.Component {
store = createStore(AppReducer);

render() {
  return (
    <Provider store={this.store}>
      <AppWithNavigationState />
    </Provider>
    );
  }
}

AppRegistry.registerComponent('NavChecks', () => NavChecks);

export default NavChecks; 

AppNavigator.js

const MainScreen = ({ dispatch }) => {

return (
<View>

  <Button
    onPress={() =>
      dispatch(NavigationActions.navigate({ routeName: 'Profile', params: { user: 'baz' } }))}
    title="Profile"
  />
</View>
);
};

MainScreen.propTypes = {
dispatch: PropTypes.func.isRequired,
};

MainScreen.navigationOptions = {
title: 'Main',
}; 

const mapStateToProps = state => ({

});

export default connect(mapStateToProps)(MainScreen);

const params  = this.props.navigation.state.params;

const ProfileScreen = () => (
  <View style={styles.container}>
  <Text style={styles.welcome}>
   {params}
  </Text>
  </View>
);

ProfileScreen.navigationOptions = {
 title: 'Profile',
};

export default ProfileScreen;

import { AppNavigator } from '../navigators/AppNavigator';

const initialNavState = AppNavigator.router.getStateForAction(
  AppNavigator.router.getActionForPathAndParams('Main')
);

function nav(state = initialNavState, action) {
  let nextState;
  switch (action.type) {
    default:
      nextState = AppNavigator.router.getStateForAction(action, state);
      break;
  }
  return nextState || state;
}

const AppReducer = combineReducers({
  nav,
});

export default AppReducer;

import MainScreen from '../components/MainScreen';
import MainScreen from '../components/MainScreen';
import ProfileScreen from '../components/ProfileScreen';

export const AppNavigator = StackNavigator({
 Main: { screen: MainScreen },
 Profile: { screen: ProfileScreen },
});

const AppWithNavigationState = ({ dispatch, nav }) => (
  <AppNavigator navigation={addNavigationHelpers({ dispatch, state: 
  nav })} /> 
);

AppWithNavigationState.propTypes = {
   dispatch: PropTypes.func.isRequired,
   nav: PropTypes.object.isRequired,
};

const mapStateToProps = state => ({
 nav: state.nav,
});

export default connect(mapStateToProps)(AppWithNavigationState);

class NavChecks extends React.Component {
store = createStore(AppReducer);

render() {
  return (
    <Provider store={this.store}>
      <AppWithNavigationState />
    </Provider>
    );
  }
}

AppRegistry.registerComponent('NavChecks', () => NavChecks);

export default NavChecks; 

从“../components/MainScreen”导入主屏幕；
从“../components/MainScreen”导入MainScreen；
从“../components/ProfileScreen”导入ProfileScreen；
export const AppNavigator=StackNavigator({
Main:{screen:MainScreen}，
配置文件：{screen:ProfileScreen}，
});
const AppWithNavigationState=（{dispatch，nav}）=>(
);
AppWithNavigationState.propTypes={
调度：需要PropTypes.func.isRequired，
导航：需要PropTypes.object.isRequired，
};
常量mapStateToProps=状态=>({
nav:state.nav，
});
导出默认连接（MapStateTops）（AppWithNavigationState）；

index.ios.js

const MainScreen = ({ dispatch }) => {

return (
<View>

  <Button
    onPress={() =>
      dispatch(NavigationActions.navigate({ routeName: 'Profile', params: { user: 'baz' } }))}
    title="Profile"
  />
</View>
);
};

MainScreen.propTypes = {
dispatch: PropTypes.func.isRequired,
};

MainScreen.navigationOptions = {
title: 'Main',
}; 

const mapStateToProps = state => ({

});

export default connect(mapStateToProps)(MainScreen);

const params  = this.props.navigation.state.params;

const ProfileScreen = () => (
  <View style={styles.container}>
  <Text style={styles.welcome}>
   {params}
  </Text>
  </View>
);

ProfileScreen.navigationOptions = {
 title: 'Profile',
};

export default ProfileScreen;

import { AppNavigator } from '../navigators/AppNavigator';

const initialNavState = AppNavigator.router.getStateForAction(
  AppNavigator.router.getActionForPathAndParams('Main')
);

function nav(state = initialNavState, action) {
  let nextState;
  switch (action.type) {
    default:
      nextState = AppNavigator.router.getStateForAction(action, state);
      break;
  }
  return nextState || state;
}

const AppReducer = combineReducers({
  nav,
});

export default AppReducer;

import MainScreen from '../components/MainScreen';
import MainScreen from '../components/MainScreen';
import ProfileScreen from '../components/ProfileScreen';

export const AppNavigator = StackNavigator({
 Main: { screen: MainScreen },
 Profile: { screen: ProfileScreen },
});

const AppWithNavigationState = ({ dispatch, nav }) => (
  <AppNavigator navigation={addNavigationHelpers({ dispatch, state: 
  nav })} /> 
);

AppWithNavigationState.propTypes = {
   dispatch: PropTypes.func.isRequired,
   nav: PropTypes.object.isRequired,
};

const mapStateToProps = state => ({
 nav: state.nav,
});

export default connect(mapStateToProps)(AppWithNavigationState);

class NavChecks extends React.Component {
store = createStore(AppReducer);

render() {
  return (
    <Provider store={this.store}>
      <AppWithNavigationState />
    </Provider>
    );
  }
}

AppRegistry.registerComponent('NavChecks', () => NavChecks);

export default NavChecks; 

类导航组件{
store=createStore（Appeducer）；
render（）{
返回(
);
}
}
AppRegistry.registerComponent（'NavChecks'，（）=>NavChecks）；
导出默认导航检查；

尝试将道具传递到

档案屏幕

：

const ProfileScreen = (props) => (
  <View style={styles.container}>
  <Text style={styles.welcome}>
   {props.navigation.state.params.user}
  </Text>
  </View>
);

const ProfileScreen=（道具）=>(
{props.navigation.state.params.user}
);

尝试将道具传递到ProfileScreen。在我看来，使用react native router flux进行导航更加灵活，我认为在导航到另一个页面时可以将参数作为道具传递

我也遇到了同样的问题，我通过在react导航中使用withNavigation解决了这个问题。

import { withNavigation } from 'react-navigation';
export default connect(mapStateToProps, mapDispatchToProps)(withNavigation(MyComponent));

---

你搞定了！成功了！谢谢mradziwon！我刚开始使用React Native，如果您允许，您能提供一种与您联系的方式，以便我在再次陷入困境时可以问一些问题寻求帮助吗？再次感谢，先生！