在 BottomTabNavigator 上打开一个模式单击 react-native答案

【问题标题】：Open a modal on BottomTabNavigator click react-native在 BottomTabNavigator 上打开一个模式单击 react-native
【发布时间】：2019-01-03 14:12:48
【问题描述】：

我试图从 bottomnavigator 打开一个模式，正在关注本教程 - https://snack.expo.io/SyJKMkFUM 我正在使用反应导航-3.0.9

这是我的 app.js 类 App 扩展 React.Component {

 renderItem = (route, index) => {
     const {
         navigation,
         jumpToIndex,
     } = this.props;
     const isCapture = route.routeName === 'Capture';
     const focused = index === navigation.state.index;
     return (
         <TouchableWithoutFeedback
             key={route.key}
             onPress={() => isCapture ? this.props.navigation.navigate('CaptureModal') : jumpToIndex(index)}
         >
             <View >
                 <Text >{route.routeName}</Text>
             </View>
         </TouchableWithoutFeedback>
     );
 };
 render() {
     const {
         navigation,
     } = this.props;

     const {
         routes,} = navigation.state;
       return (
         <View style={styles.container}>
             {routes && routes.map(this.renderItem)}
         </View>
     );}}
   const Screen = (props) => (
    <View >
    <Text>{props.title} Screen</Text>
    </View>
    );
    const styles = StyleSheet.create({
       container: {
       flex: 1,
        backgroundColor: '#fff',
       },
        });
      const TabNavigator = createBottomTabNavigator({
      Home: {
    screen: HomeScreen
},
Link: {
    screen: LinksScreen
},
settings: {
    screen: View,
},
 });
   const CaptureStack = createStackNavigator({
   Capture: {
    screen: (props) => <Screen title="Capture" {...props} />,
    navigationOptions: ({ navigation }) => ({
        headerTitle: 'Capture',
        headerLeft: (
            <Button
                title="Back"
                onPress={() => navigation.goBack(null)}
            />),}),},})

      const RootStack1 = createStackNavigator({
     Main: {
    screen: TabNavigator,
       },
        CaptureModal: {
    screen: CaptureStack,
    navigationOptions: {
        gesturesEnabled: false,
        },
      },
     }, {
headerMode: 'none',
mode: 'modal',
   });

const AppNavigator = createAppContainer(RootStack1); 导出默认 AppNavigator；

谁能解释一下这有什么问题？可能是路由版本问题，因为教程使用的是 1.0.0 。

【问题讨论】：

你能清理一下这段代码吗，缺乏可读性让我无法解决你的问题

标签： android react-native react-navigation expo

【解决方案1】：

如果有人在这里看我如何实现它，我确实解决了我的问题 -

我的目标 ->
单击主屏幕->选项卡式活动->单击任何选项卡新屏幕

在我的 app.js 中，我创建了如下导航 -

const TabNavigator = createBottomTabNavigator({
    HomeScreen: {
    screen: HomeScreen
},
    LinksScreen: {
    screen: LinksScreen
},
    LoginScreen: {
    screen: SurveyScreen,
},

 },
{
 initialRouteName : 'HomeScreen' ,
});

const RootStack1 = createStackNavigator({
TabNavigator: {
    screen: TabNavigator,
},
CaptureModal: {
    screen: LoginScreen,
     navigationOptions: {
         gesturesEnabled: false,
     },
  },
}, {
headerMode: 'none',
mode: 'modal',
headerLeft: null
});

const mainStack = createStackNavigator({

InsideApp: {
    screen: MainScreen,

},
StartScreen: {
    screen: RootStack1,
},
} ,{
headerMode: 'none',
headerLeft: null
},);

const AppNavigator = createAppContainer(mainStack);
export default AppNavigator;

现在我的模态屏幕将在点击第三个选项卡 (SurveyScreen) 时弹出，要在调查屏幕中实现这一点，我所要做的就是覆盖 didmount 功能并从那里打开模态 -

 componentDidMount() {
     console.log('didmount called.');
     this.props.navigation.navigate('CaptureModal')         
 }

对于从模态到选项卡活动的后退导航，我使用了 stackreset -

const resetAction = StackActions.reset({
 index: 0,
 actions: [NavigationActions.navigate({ routeName: 'TabNavigator' })],
});

然后点击返回 -

onPress={ () => this.props.navigation.dispatch(resetAction)

【讨论】：