StackNavigator 内的嵌套 TabNavigator：控制标题答案

【问题标题】：Nested TabNavigator inside StackNavigator: controlling the headerStackNavigator 内的嵌套 TabNavigator：控制标题
【发布时间】：2018-12-04 04:25:18
【问题描述】：

我的设置很像这样：

let Tabs = createBottomTabNavigator({
    screen1: Screen1,
    screen2: Screen2
})

let Stack = createStackNavigator({
    tabs: Tabs
    otherScreen: OtherScreen
})

堆栈导航器有一个标题，这很好。我想要的是根据我当前所在的选项卡获得不同的标题图标。

我正在使用以下版本：

"react": "16.3.1",
"react-native": "~0.55.2",
"react-navigation": "^2.2.5"

我考虑过切换我的设置，以便每个标签屏幕都有自己的StackNavigator，但我喜欢在切换标签时有滑动动画，我不希望标题图标滑动。标题栏应保持静态，但仅根据当前选项卡显示不同的图标。

【问题讨论】：

标签： reactjs react-native react-navigation

【解决方案1】：

你可以像下面这样使用，https://reactnavigation.org/docs/en/stack-navigator.html

//Screen1 Stack.

const Screen1 = createStackNavigator ({
    Home: {
        screen: Home,
        navigationOptions: {
            header: null //Need to set header as null.
        }
    }
});

//Screen2 Stack

const Screen2 = createStackNavigator ({
    Profile: {
        screen: Profile,
        navigationOptions: {
            header: null  //Need to set header as null.
        }
    }
});


let Tabs = createMaterialTopTabNavigator({
    Screen1:{
      screen: Screen1 //Calling Screen1 Stack.
    },
    Screen2:{
      screen: Screen2 //Calling Screen2 Stack.
    }
},{ tabBarPosition: 'bottom' }) //this will set the TabBar at Bottom of your screen.

let Stack = createStackNavigator({
    tabs:{
      screen: Tabs, //You can add the NavigationOption here with navigation as parameter using destructuring.
      navigationOptions: ({navigation})=>{
       //title: (navigation.state.routes[navigation.state.index])["routeName"]  
       //this will fetch the routeName of Tabs in TabNavigation. If you set the routename of the TabNavigation as your Header. 

       //use the following title property,this will fetch the current stack's routeName which will be set as your header in the TabBar.

        //title: (navigation.state.routes[navigation.state.index]["routes"])[(navigation.state.routes[navigation.state.index]["index"])].routeName

       //you can use switch case,on matching the route name you can set title of the header that you want and also header left and right icons similarly.

        switch ((navigation.state.routes[navigation.state.index]["routes"])[(navigation.state.routes[navigation.state.index]["index"])].routeName) {
            case "Screen1":
                return {
                    title: "Home", 
                    headerLeft: (<Button
                        onPress={()=> alert("hi")}
                        title="Back"
                        color="#841584"
                        accessibilityLabel="Learn more about this purple button"
                    /> ),
                    headerRight: <Button title= "Right"/>
                }
            case "Screen2":
                return { 
                    title: "Profile",
                    headerLeft: (<Button
                        onPress={()=> alert("hi")}
                        title="Back"
                        color="#841584"
                        accessibilityLabel="Learn more about this purple button"
                    /> ),
                    headerRight: <Button title= "Right"/>
                }
            default:
                return { title: (navigation.state.routes[navigation.state.index]["routes"])[(navigation.state.routes[navigation.state.index]["index"])].routeName }
        }
      }
    },
    otherScreen:{
      screen: OtherScreen
    }
})

//导航选项

  navigationOptions: ({navigation})=>{
   //title: (navigation.state.routes[navigation.state.index])["routeName"]  
   //this will fetch the routeName of Tabs in TabNavigation. If you set the routename of the TabNavigation as your Header. 

   //use the following title property,this will fetch the current stack's routeName which will be set as your header in the TabBar.

    //title: (navigation.state.routes[navigation.state.index]["routes"])[(navigation.state.routes[navigation.state.index]["index"])].routeName

    switch ((navigation.state.routes[navigation.state.index]["routes"])[(navigation.state.routes[navigation.state.index]["index"])].routeName) {
        case "Screen1":
            return {
                title: "Home", 
                headerLeft: (<Button
                    onPress={()=> alert("hi")} //Here you can able to set the back behaviour.
                    title="Back"
                    color="#841584"
                    accessibilityLabel="Learn more about this purple button"
                /> ),
                headerRight: <Button title= "Right"/>
            }
        case "Screen2":
            return { 
                title: "Profile",
                headerLeft: (<Button
                    onPress={()=> alert("hi")} 
                    title="Back"
                    color="#841584"
                    accessibilityLabel="Learn more about this purple button"
                /> ),
                headerRight: <Button title= "Right"/>
            }
        default:
            return { title: (navigation.state.routes[navigation.state.index]["routes"])[(navigation.state.routes[navigation.state.index]["index"])].routeName }
    }
  }

//alert(navigation.state)

{

    "routes":[
        {
            "key":"Screen1",
            "routeName":"Screen1",
            "routes":[
                {
                    "key":"Home",
                    "routeName":"Home",
                }
            ],
            "index":0,
            "isTransitioning":false,
            "key":"id-1530276062643-0"
        },
        {
            "key":"Screen2",
            "routeName":"Screen2",
            "routes":[
                {
                    "key":"Profile",
                    "routeName":"Profile",
                }
            ],
            "index":0,
            "isTransitioning":false,
            "key":"id-1530276062643-0"
        }
    ],
    "index":0,
    "isTransitioning":false,
    "routeName":"tabs",
    "key":"id-1530276062643-0"

}

//(navigation.state.routes[navigation.state.index])["routeName"] //(navigation.state.routes[navigation.state.index]["routes"])[(navigation.state.routes[navigation.state.index]["index"])].routeName

this will give the current route name of the tab inside StackNavigation.

上面的代码会将TabBar所在的根堆栈头中的标题设置为第一个路由，因此我们将TabBar中单个堆栈的标题设置为null。通过使用这种方式将在 TabBar 中切换屏幕时提供动画，因为标题将保持静态。

你可以在这里找到工作副本https://www.dropbox.com/s/jca6ssn9zkzh9kn/Archive.zip?dl=0

下载并执行以下操作。

npm install //获取依赖项
react-native upgrade //获取android和ios文件夹
react-native link //链接依赖和库
react-native run-ios（或）react-native run-android

你可以使用上面的，如果有请告诉我。

【讨论】：

@Anthony De Smet，我已经更新了我的答案，请检查一下，如果这能解决你的问题，请告诉我。
虽然这可行，但您不能将标题标题更改为除了 routeName 之外的任何其他内容，对吗？例如“Screen2”标题将始终为“Screen2”，或者您可以以某种方式将其设置为：“子项 XXX 的屏幕标题”？
@Chris，我已根据您的要求更新了我的答案。您可以通过在与我们的 routeName 匹配的 navigationOptions 中使用 switch case 来设置标题、headerLeft、headerRight 等来实现它。通过这种方式，我们可以设置标题而与 routeName 无关。
@dhivyas 我在这里也有关于嵌套标签的问题stackoverflow.com/questions/55888800/… 你认为我们可以用类似的解决方案来解决吗？
可以看看这个Q吗stackoverflow.com/questions/56999290/…@dhivyas

【解决方案2】：

您可以使用您当前的导航堆栈配置来实现所需的行为。您可能需要更改一些东西并组合几个属性，但是当您熟悉它时，这相当简单。

我试着用一个小例子来解释。

考虑拥有以下导航器；

const Tabs = createBottomTabNavigator({
    screen1: Tab1,
    screen2: Tab2
})

const Stack = createStackNavigator({
    tabs: {
      screen: TabsPage,
      navigationOptions: ({navigation}) => {
        return { title: (navigation.state.params && navigation.state.params.title ? navigation.state.params.title : 'No Title' ) }
      }
    },
    otherScreen: Page
})

如您所见，我正在从导航状态设置标题参数。为了能够为该导航器设置参数，我们将从screenProps 属性中获得帮助；

class TabsPage extends Component {
  onTabsChange = (title) => {
    this.props.navigation.setParams({ title })
  }
  render() {
    return(<Tabs screenProps={{ onTabsChange: this.onTabsChange }} />)
  }
}

我为标签导航器创建了一个包装器组件，并传递了一个设置标题参数的函数。

对于最后一部分，我们需要知道如何以及何时使用我们传下来的函数。为此，我们将使用addListener 导航道具

class Tab1 extends React.Component {
  setTitle = () => {
    this.props.screenProps.onTabsChange('Title from Tab 1')
  }
  componentDidMount() {
    this.props.navigation.addListener('willFocus', this.setTitle)
  }
  render() {
    return <View><Text>{'Tab1'}</Text></View>
  }
}

当我们的选项卡聚焦时，传递的函数将运行，然后为该选项卡设置标题。您可以使用此过程为标题设置不同的按钮或图标。你可以找到工作零食here。

【讨论】：

这确实是一个更好的解决方案，但是您如何导航到“otherScreen”？ this.props.navigation.navigate('Page');在 Tab1 或 Tab2 中不起作用
你能看看这个Q吗stackoverflow.com/questions/56999290/…@bennygenel

【解决方案3】：

const RootStack = createStackNavigator(
  {
    Home: {screen: HomeScreen},
    FilterScreen: createMaterialTopTabNavigator({
        Tab1: {screen:Tab1Screen},
        Tab2: {screen: Tab2Screen},
    }),
  },
  {
    mode: 'modal',
    headerMode: 'none',
  }
);


render() {
    return <RootStack/>;
}

【讨论】：

你能看看这个Q吗stackoverflow.com/questions/56999290/…@MahdiBashirpour

【解决方案4】：

在 AppNavigation.js //或您定义路线的地方。

let Tabs = createBottomTabNavigator({
    screen1: Screen1,
    screen2: Screen2
})

let Stack = createStackNavigator({
    tabs: Tabs
    otherScreen: OtherScreen
},{
    headerMode:"float", //Render a single header that stays at the top and animates as screens are changed. This is a common pattern on iOS.
    headerTransitionPreset:"fade-in-place" //this will give a slight transition when header icon change.
  }
)

在 Screen1.js 中

class Screen1 extends Component {
 
 static navigationOptions = ({ navigation }) => {

    return {
      ...
      headerLeft: <HeaderLeftImage navigation={navigation} image={"Image_For_Screen1"}/>,
      ...
    }
  }
  ...
}

注意：您可以添加标题、headersStyle、headerRight 以同样的方式阅读此链接header configuration 了解更多详情

在 Screen2.js 中与 Screen1 类似

class Screen2 extends Component {
 
 static navigationOptions = ({ navigation }) => {

    return {
      ...
      headerLeft: <HeaderLeftImage navigation={navigation} image={"Image_For_Screen2"}/>,
      ...
    }
  }
  ...
}

Header.js

export const HeaderLeftImage = (props) => (
    <View style={{
       'add styles'
    }}>
        <TouchableOpacity onPress={() => {"Add action here" }}>
            <Image source={props.image} resizeMethod='resize' style={{ height: 30, width: 90, resizeMode: 'contain' }} />
        </TouchableOpacity>
    </View>
)

希望对您有所帮助，如果您对代码有任何疑问，请随时提问。

【讨论】：

你能看看这个Q吗stackoverflow.com/questions/56999290/…@RajatGupta

【解决方案5】：

如果你使用 react navigation

const Tabs = TabNavigator({
    Tab1:{
         screen: Tab1,
         navigationOptions: ({navigation}) => {
            return { title: "Tab 1 Heading", tabBarLabel:"Tab 1 "}
    },
    }
    Tab2:{
       screen: Tab2
       navigationOptions: ({navigation}) => {
         return { title: "Tab 2 Heading", tabBarLabel:"Tab 2 "}
    }
    }
})

const Stack = StackNavigator({
    tabs: {
      screen: Tabs
      navigationOptions: ({navigation}) => {
        return { title: "Stack"}
      }
    },
    otherScreen: Page
})

我不确定他们为什么要删除此功能，当您尝试相同的功能时，它将无法在最新的 react-navigation 上运行。现在标题对象键似乎用于后备。

这可能对某些用户有所帮助。如果您愿意，也可以尝试降级。

我为我的项目升级了 React Navigation，我认为这种方式对某人有用

const Tabs = TabNavigator({
     Tab1:{
        screen: Tab1,
        navigationOptions: ({navigation}) => {
           return { tabBarLabel:"Tab 1 "}
        }},
     Tab2:{
        screen: Tab2
        navigationOptions: ({navigation}) => {
           return { tabBarLabel:"Tab 2 "}
        }}
});
Tabs.navigationOptions = ({navigation})=>{
    const { routeName } = navigation.state.routes[navigation.state.index]; //This gives current route
    switch(routeName){
         case "Tab1":
           headerTitle="Tab 1";
           break;
         case "Tab1":
           headerTitle="Tab 1";
           break;
    }

 return {
   headerTitle: headerTitle
}
}

【讨论】：

你能看看这个Q吗stackoverflow.com/questions/56999290/…@AshwinMothilal

【解决方案6】：

您可以简单地使用属性headerShown: false。我创建了一个react-navigation 版本的工作示例：5.x.x，嵌套不同的导航器：stack、drawer 和bottom-tabs。

这里是 github 的链接： https://github.com/mvpbuddy/react-native-nested-navigators/

如需更详细的概述，您可以查看我的博客： https://mvpbuddy.io/blog/detail/how-to-build-an-app-with-nested-stack-drawer-bottom-tab-navigators

【讨论】：