基本上你想要Navigator每个Tab,所以你可以有每个Tab和一个导航器包含Tabs(TabBar)的路由栈.您还要为TabBar设置初始路由堆栈,并在这些路由之间跳转.

了解Navigator方法之间的区别很重要.

>当您弹出路线时,它将被卸载,并将活动索引移动到
最后一个.因为最后一个被保持在状态,它将被恢复
以前渲染(很有可能会改变道具).再次到弹出的路线将完全恢复场景(这发生在你身上).
>当你推路由时,没有任何东西被卸载,新路由被挂载.
>当你跳转ToIndex路由时,再次没有挂载,所以跳
路线之间恢复场景(再次,如果道具改变了)
场景将重现).

所以,我不认为这是正确的：

I was able to create Tab based Navigation but the issue that i am facing now is when i switch between tabs the component is unmounted and it re-render every time.

…您卸载导航操作错误的路线.

现在还有什么不同,NavigationCardStack并没有实际创建它自己的状态,它是从外部传递的,这给了你很大的灵活性.还有一件好事是,您可以使用Facebook提供的reducer进行常见操作(例如push,pop,jumpToIndex;它们是Navigation Utils的一部分).

你有完整的例子,说明如何创建navigationState和它的reducers here,所以我不会解释,只是给出想法如何解决你的问题.

[更新]示例现在工作！

import React from 'react';
import { NavigationExperimental,View,Text,StyleSheet } from 'react-native';

const {
  CardStack: NavigationCardStack,StateUtils: NavigationStateUtils,} = NavigationExperimental;

const style = StyleSheet.create({
  screen: {
    flex: 1,},screenTitle: {
    marginTop: 50,fontSize: 18,pushNewScreenLabel: {
    marginVertical: 10,fontSize: 15,fontWeight: "bold",goBackLabel: {
    fontSize: 15,tabBarWrapper: {
    position: 'absolute',height: 50,bottom: 0,left: 0,right: 0,top: null,backgroundColor: 'grey',flexDirection: 'row',flex: 0,alignItems: 'stretch',tabBarItem: {
    flex: 1,justifyContent: 'center',backgroundColor: 'red',});

export class TabBar extends React.Component {
  constructor(props,context) {
    super(props,context);

    this.jumpToTab = this.jumpToTab.bind(this);

    // Create state
    this.state = {
      navigationState: {
        // Active route,will  be rendered as default
        index: 0,// "tab-s" represents route objects
        routes: [
          { name: 'Tab1',key: '1' },{ name: 'Tab2',key: '2' },{ name: 'Tab3',key: '3' },{ name: 'Tab4',key: '4' }],};
  }

  jumpToTab(tabIndex) {
    const navigationState = NavigationStateUtils.jumpToIndex(this.state.navigationState,tabIndex);
    this.setState({ navigationState });
  }

  renderScene({ scene }) {
    return <Tab tab={scene.route} />;
  }

  render() {
    const { navigationState } = this.state;
    return (
      <View style={style.screen}>
        <NavigationCardStack
          onNavigate={() => {}}
          navigationState={navigationState}
          renderScene={this.renderScene}
        />
        <View style={style.tabBarWrapper}>
          {navigationState.routes.map((route,index) => (
            <TabBarItem
              key={index}
              onPress={this.jumpToTab}
              title={route.name}
              index={index}
            />
            ))}
        </View>
      </View>
    );
  }
}

class TabBarItem extends React.Component {
  static propTypes = {
    title: React.PropTypes.string,onPress: React.PropTypes.func,index: React.PropTypes.number,}

  constructor(props,context);
    this.onPress = this.onPress.bind(this);
  }
  onPress() {
    this.props.onPress(this.props.index);
  }
  render() {
    return (
      <Text style={style.tabBarItem} onPress={this.onPress}>
        {this.props.title}
      </Text>);
  }
}

class Tab extends React.Component {
  static propTypes = {
    tab: React.PropTypes.object,context);
    this.goBack = this.goBack.bind(this);
    this.pushRoute = this.pushRoute.bind(this);
    this.renderScene = this.renderScene.bind(this);
    this.state = {
      navigationState: {
        index: 0,routes: [{ key: '0' }],};
  }

  // As in TabBar use NavigationUtils for this 2 methods
  goBack() {
    const navigationState = NavigationStateUtils.pop(this.state.navigationState);
    this.setState({ navigationState });
  }

  pushRoute(route) {
    const navigationState = NavigationStateUtils.push(this.state.navigationState,route);
    this.setState({ navigationState });
  }

  renderScene({ scene }) {
    return (
      <Screen
        goBack={this.goBack}
        goTo={this.pushRoute}
        tab={this.props.tab}
        screenKey={scene.route.key}
      />
    );
  }

  render() {
    return (
      <NavigationCardStack
        onNavigate={() => {}}
        navigationState={this.state.navigationState}
        renderScene={this.renderScene}
      />
    );
  }
}

class Screen extends React.Component {
  static propTypes = {
    goTo: React.PropTypes.func,goBack: React.PropTypes.func,screenKey: React.PropTypes.string,tab: React.PropTypes.object,context);
    this.nextScreen = this.nextScreen.bind(this);
  }

  nextScreen() {
    const { goTo,screenKey } = this.props;
    goTo({ key: `${parseInt(screenKey) + 1}` });
  }

  render() {
    const { tab,goBack,screenKey } = this.props;
    return (
      <View style={style.screen}>
        <Text style={style.screenTitle}>
          {`Tab ${tab.key} - Screen ${screenKey}`}
        </Text>
        <Text style={style.pushNewScreenLabel} onPress={this.nextScreen}>
          Push Screen into this Tab
        </Text>
        <Text style={style.goBackLabel} onPress={goBack}>
          Go back
        </Text>
      </View>
    );
  }
}

## TBD多一点清理..