如何制作"Go back to initial StackNavigator Screen when TabNavigator's Tab is pressed"

Question

into

就像Facebook，Instagram和任何其他移动应用一样，我想实现"返回stacknavigator中的初始屏幕"

1. 如果用户按按钮，
2. 它可以回到第一页。

简单用例

1. 请参阅tabnavigator
2. 转到" feed"选项卡
3. 转到"用户"屏幕
4. 转到另一个"用户"屏幕
5. 按主选项卡图标 - 'feed'}
6. 返回" feed"选项卡//，因此您不会看到"后退"按钮

，如果您不了解此用例，请发表评论，我将为您绘制其状态流量

我主Tabnavigator上图标的代码。

navigationOptions: ({ navigation }) => ({
      header: null,
      tabBarIcon: ({ focused }) => {
          const { routeName } = navigation.state;
          ....
          return (
              <TochableWithoutFeedback onPress={()=>{navigation.goback(iconName)}> 
              // undefined is not a function when I press the Button 
              // deeper screen. (not getting any error on Main)
                  <Ionicons
                      name={iconName}
                      size={30}
                      style={{ marginBottom: -3 }}
                      color={focused ? Colors.tabIconSelected : Colors.tabIconDefault}
                      />
             <TochableWithoutFeedback>
         );
  },

Answer 1

实际上，这取决于您的路由有多少深，例如Instagram 2至3深的路由，否则tabs

因此，您可以使用

重置路由器或返回主路由器

this.props.navigation.goBack(null)

例如。

标签导航儿童AHS堆栈导航，因此在堆栈中，您可以做

之类的事情

// Anyone watching this, please check your react-navigation version
// I'm using ^1.0.0-beta.21.
// props for tabBarOnpress varies can be varied (Editor John Baek)
tabBarOnPress: ({scene, jumpToIndex}) => {
      jumpToIndex(scene.index)
      navigation.dispatch(NavigationActions.reset({
        index: 0,
        actions: [
          NavigationActions.navigate({ routeName: 'home' }) // go to first screen of the StackNavigator
        ]
      }))
    }

因此，每当有人按Home Tab时，所有路由重置，您就会看到Feed屏幕，就像Instagram

TabNavigation 
  -Home
      |
      StakeNavigation 
                    |
                    mainScreen //main of home 
                    Subrouts 
                    RouteToProfile //just like insta
  -Search 
        |
         StakeNavigation 
                       |
                       mainScreen //main of search 
                       searchResult //if people serch some specific 

继续...因此，在Tab的StakenAvigation级别重置路线

const SubHome = StackNavigator({
  Home: { screen: Home },
  Home2: { screen: Home2 },
  Home3 : { screen: Home3 },
},{
  navigationOptions:({navigation,screenProps})=>({
    tabBarLabel: I18n.t('tab_car'),
    tabBarIcon: ({ tintColor }) => (
      <CustomIcon name={'Home'} width={28} height={30} fill={tintColor} />
    ),
    tabBarOnPress: (tab, jumpToIndex) => {
      jumpToIndex(tab.index)
      navigation.dispatch(NavigationActions.reset({
        index: 0,
        actions: [
          NavigationActions.navigate({ routeName: 'Home' }) // go to first screen of the StackNavigator
        ]
      }))
    }
  }),
  headerMode:'none'
});