在TabNavigator中隐藏TabBar项目

Question

如何对TabNavigator隐藏特定的TabBar项。是否有特定的TabBarOptions选项，其visible键(true/false)如下所示？

const Tabs = TabNavigator({
  Home: {
    screen: Home
  },
  Profile: {
    screen: Thanks,
    tabBarOptions: {
      visible: false
    },
  },
  More: {
    screen: More
  },
})

Answer 1

对于在TabNavigator中隐藏特定项目，没有“可见”选项。

您需要创建Stacknavigator和Tabnavigator。在Stacknavigator中，您将添加您的“不可见”选项卡项，并在末尾添加其“可见”选项卡项的Tabnavigator。

作者:来自GitHub的@ragnorc

const TabsScreen = TabNavigator({
  Profile: { // visible TabBar item
    screen: Thanks,
    tabBarOptions: {
      visible: false
    },
  },
  More: { // visible TabBar item
    screen: More
  },
})

const MainScreenNavigator = StackNavigator({
    Home: { // invisible TabBar item
        screen: Home,
        navigationOptions : {
            header: null /* hide header*/
        }
    },
    Screen 2: { }, // invisible TabBar item
    Screen 3: { }, // invisible TabBar item
    Screen 4: { }, // invisible TabBar item
    TabsScreen: { 
        screen: TabsScreen,
        navigationOptions : {
            header: null /* hide header*/
        }
    },
});

Answer 2

tabBarOptions的问题是只隐藏所选屏幕的当前导航(选项卡)。但不隐藏/显示选项卡。

tabBarOptions: {
      visible: false
    }

自定义解决方案

我使用createMaterialTopTabNavigator创建了一些特殊的类来实现这一点

export default class CustomTabsNavigator extends Component {
  // Final navigation setup with screens
  TabsNavigation;

  constructor(props) {
    super(props);
    // Only this is necessary if you just want to hide/show without change it.
    this._setScreens();
  }
  // This is necessary if you want to hide/show depending on some user behavior
  componentDidUpdate(prevProps) {
    // Add your condition to avoid infinite renders
    if (prevProps.foo === this.props.foo) return;
    this._setScreens();
  }
  // Actual code to show/hide based on props.
  _setScreens = () => {
    const { isAdmin } = this.props;
    const screens = {};
    const settings = {
      tabBarOptions: {
        style: {...}
      }
    };
    // Set tabs depending on user and state
    if (isAdmin) {
      screens.Dashboard = {
        screen: DashboardScreen,
        navigationOptions: { ... }
      };
    }
    screens.Home = { screen: HomeScreen };
    this.TabsNavigation = createMaterialTopTabNavigator(screens, settings);
    // Since we are not using setState
    this.forceUpdate();
  };

  render() {
    // AppContainer is required in react-native version 3.x
    const { props } = this;
    const NavigatorTabs = createAppContainer(this.TabsNavigation);
    return <NavigatorTabs screenProps={{ ...props }} />;
  }
}

tabs的实现：

<CustomTabsNavigator isAdmin={true} />

Answer 3

我的解决方案是返回一个自定义选项卡栏按钮，即:高度和宽度设置为0的视图，工作正常

<Tabs.Screen name="Refer A Friend" component={WebViewComponent} 
    options={{
        tabBarButton: () => (
            <View style={{width:0, height:0}}></View>
        ),
        tabBarVisible:false //hide tab bar on this screen

    }}
/>

更新:正如@Aman Deep所指出的，你可以只返回null

<Tabs.Screen name="Refer A Friend" component={WebViewComponent} 
    options={{
        tabBarButton: () => null,
        tabBarVisible:false //hide tab bar on this screen

    }}
/>