如何在同一屏幕内更改视图（React Native）？

Question

我想用 react-native-scrollable-tab-view 复制以下内容：

目前我的代码如下，但我不确定如何执行和合并模块以使事情变得更容易 - 有人对我如何实现它有任何想法吗？（我是新手，所以感谢任何帮助）：

这是主要的（选项卡视图）：

'use strict';

var React = require('react-native');
var Dimensions = require('Dimensions');
var window = Dimensions.get('window');
var Icon = require('react-native-vector-icons/FontAwesome');
var Restaurants = require('../Helpers/Restaurants');
var More = require('../Helpers/More');
var api = require('../Api/Api');
var Profile = require('../Helpers/Profile');
var Recipes = require('../Helpers/Recipes');
var Actions = require('react-native-router-flux').Actions;
var Home = require('../Helpers/Home');

var {
  StyleSheet,
  Text,
  View,
  Image, 
  TabBarIOS,
  Component
} = React;


class Main extends React.Component{
  constructor(props) {
    super(props);
    this.state = {
      selectedTab: 'home',
      notifCount: 0,
      presses: 0,
    };
  }

  GoBack() {
    this.props.navigator.pop();
  }

  render() {
    return (
      <TabBarIOS 
        tintColor="#49B64D"
        barTintColor="rgba(255,255,255,0.3)"
        selectedTab={this.state.selectedTab}>
        <Icon.TabBarItem
          selected={this.state.selectedTab === 'home'}
          icon={require('image!homeicon')}
          onPress={() => {
              this.setState({
                  selectedTab: 'home',
              });
          }}>
            <Home/>
        </Icon.TabBarItem>
        <Icon.TabBarItem
          selected={this.state.selectedTab === 'restaurants'}
          icon={require('image!nomicon')}
          onPress={() => {
                this.setState({
                    selectedTab: 'restaurants',
                });
          }}>
          <Restaurants/>
        </Icon.TabBarItem>
       <Icon.TabBarItem
          selected={this.state.selectedTab === 'recipes'}
          icon={require('image!haticon')}
          onPress={() => {
                this.setState({
                    selectedTab: 'recipes',
                });
          }}>
          <Recipes/>
        </Icon.TabBarItem>
        <Icon.TabBarItem
          selected={this.state.selectedTab === 'profile'}
          icon={require('image!accounticon')}
          onPress={() => {
                this.setState({
                    selectedTab: 'profile',
                });
          }}>
          <Profile/>
        </Icon.TabBarItem>
      </TabBarIOS>
    );
  }
};

var styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: 'transparent'
  },
  bgImage: {
    flex: 1,
    width: window.width,
    resizeMode: 'cover',
  },
});

module.exports = Main;

这是您点击食谱选项卡时的食谱视图：

'use strict';
var React = require('react-native');
var Seperator = require('./Seperator');
var api = require('../Api/Api');
var Dimensions = require('Dimensions');
var window = Dimensions.get('window');
var LinearGradient = require('react-native-linear-gradient');
var Swipeout = require('react-native-swipeout');
var List = require('./List');
var RecipeDetails =  require('./RecipeDetails');
var Actions = require('react-native-router-flux').Actions;


var {
  ScrollView,
  Text,
  View,
  TouchableHighlight,
  StyleSheet,
  Image,
  ListView,
  NavigatorIOS,
} = React;

var styles = StyleSheet.create({
  description: {
    fontSize: 20,
    textAlign: 'center',
    color: '#FFFFFF'
  },
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: 'transparent',
  },
  linearGradient: {
    flex: 1,
    paddingLeft: 15,
    paddingRight: 15,
    borderRadius: 5,
    opacity: 0.9,
    height: window.width,
  },
  dietText: {
    color:'white',
    fontFamily: 'Avenir Next', 
    alignSelf:'center',
  },
  title: {
    textAlign:'left', 
    marginTop: (window.width/1.4), 
    fontSize: 20, 
    color: 'white', 
    fontFamily: 'Avenir Next', 
    fontWeight: '500',
  },
  dietbuble: {
    backgroundColor:'transparent', 
    height:20, 
    width:60, 
    borderRadius: 10, 
    backgroundColor:'#49B64D',
    marginRight:5,
  },
  nombtn: {
    height: 30,
    width: 30,
    marginBottom: 5,
  }, 
  arrow: {
    height: 15,
    width: 15,
    marginRight: 20,
    marginTop: 5,
  }, 
  upvotenum: {
    marginRight: 5, 
    fontSize: 20, 
    fontWeight: "600",
    color: 'white',
    fontFamily: 'Avenir Next'
  }, 
  dish_num: {
    backgroundColor:'#49B64D',
    height: 30,
    width: 100,
    marginLeft: window.width/1.36,
    borderRadius: 5,
  },
  dishtext: {
    fontFamily: "Avenir Next",
    fontSize: 20,
    fontWeight: "400",
    textAlign: 'center',
    color:"white",
  },
  profilebubble: {
    width: 40,
    height: 40,
    borderRadius: 20,
    margin: 2,
  }
});

var list = [
  {
    component: <List/>
  }
]

class Recipes extends React.Component{

  constructor(props) {
    super(props);
    this.state = {
      venues: new Object(),
    };
  }

  activateHome() {
    api.getAnything(this.props.paleo,this.props.vegan,this.props.vegetarian,this.props.healthy,this.props.dairyfree,this.props.nutfree,this.props.glutenfree)
      .then((res) => {
        console.log(res);
        return res;
    });
  }

  detailsRecipe() {
    this.props.navigator.push ({
        component: RecipeDetails,
        title: "",
    })
  }

  render(){ 

    return (
      <ScrollView
        alwaysBounceVertical={true}
        scrollEventThrottle={200}>
        <Swipeout right={list}>
            <View style={styles.container}>
                <Image source={{uri: 'http://i.huffpost.com/gadgets/slideshows/404432/slide_404432_5031844_free.jpg'}} style={{width: window.width, height: window.width}}>
                  <View style={{backgroundColor: 'transparent', marginBottom: 100,}}>
                    <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent'}}>
                      <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent'}}>
                        <Image source={{uri: 'http://cookieandkate.com/images/2014/02/kate-600.jpg'}} style={styles.profilebubble}/>
                        <Image source={{uri: 'http://www.thetimes.co.uk/tto/multimedia/archive/00851/82ef9ae8-ae34-11e4-_851122b.jpg'}} style={styles.profilebubble}/>
                      </View>
                    </View>
                    <LinearGradient colors={['transparent', 'transparent', '#1C1C1C']} style={styles.linearGradient}>
                        <TouchableHighlight onPress={Actions.recipedetails} underlayColor='transparent'>
                          <View style={{backgroundColor:'transparent', height: window.width, marginTop:-20}}>
                            <Text style={styles.title}>Recipe Name | 10 Mins</Text>
                          </View>
                        </TouchableHighlight>
                        <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent', marginTop: -75}}>
                           <View style={styles.dietbuble}>
                              <Text style={styles.dietText}>Vegan</Text>
                           </View>
                           <View style={styles.dietbuble}>
                              <Text style={styles.dietText}>Vegie</Text>
                           </View>
                           <View style={{flex: 1, flexDirection: 'row', marginLeft: window.width/3, backgroundColor: 'transparent'}}>
                             <Text style={styles.upvotenum} >20</Text>
                             <Image style={styles.arrow} source={require('image!upvotearrow')}></Image>
                             <Image style={styles.nombtn} source={require('image!nombtn')}></Image>
                            </View>
                        </View>
                      </LinearGradient>
                    </View>
                </Image>
            </View>
        </Swipeout>
        <Seperator/>
        <Swipeout right={list}>
            <View style={styles.container}>
                <Image source={{uri: 'http://www.funkinutt.com/wp-content/uploads/2013/06/Vegan-Scallops-Sophies-Kitchen.jpg'}} style={{width: window.width, height: window.width}}>
                  <View style={{backgroundColor: 'transparent', marginBottom: 100,}}>
                    <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent'}}>
                      <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent'}}>
                        <Image source={{uri: 'http://cookieandkate.com/images/2014/02/kate-600.jpg'}} style={styles.profilebubble}/>
                        <Image source={{uri: 'http://www.thetimes.co.uk/tto/multimedia/archive/00851/82ef9ae8-ae34-11e4-_851122b.jpg'}} style={styles.profilebubble}/>
                      </View>
                    </View>
                    <LinearGradient colors={['transparent', 'transparent', '#1C1C1C']} style={styles.linearGradient}>
                        <TouchableHighlight onPress={Actions.recipedetails} underlayColor='transparent'>
                          <View style={{backgroundColor:'transparent', height: window.width, marginTop:-20}}>
                            <Text style={styles.title}>Recipe Name | 10 Mins</Text>
                          </View>
                        </TouchableHighlight>
                        <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent', marginTop: -75}}>
                           <View style={styles.dietbuble}>
                              <Text style={styles.dietText}>Vegan</Text>
                           </View>
                           <View style={styles.dietbuble}>
                              <Text style={styles.dietText}>Vegie</Text>
                           </View>
                           <View style={{flex: 1, flexDirection: 'row', marginLeft: window.width/3, backgroundColor: 'transparent'}}>
                             <Text style={styles.upvotenum} >20</Text>
                             <Image style={styles.arrow} source={require('image!upvotearrow')}></Image>
                             <Image style={styles.nombtn} source={require('image!nombtn')}></Image>
                            </View>
                        </View>
                      </LinearGradient>
                    </View>
                </Image>
            </View>
        </Swipeout>
        <Seperator/>
        <Swipeout right={list}>
            <View style={styles.container}>
                <Image source={{uri: 'http://m5.paperblog.com/i/37/370315/guest-blogger-vegan-richa-samosa-and-onion-bh-L-KmHfF4.jpeg'}} style={{width: window.width, height: window.width}}>
                  <View style={{backgroundColor: 'transparent', marginBottom: 100,}}>
                    <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent'}}>
                      <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent'}}>
                        <Image source={{uri: 'http://cookieandkate.com/images/2014/02/kate-600.jpg'}} style={styles.profilebubble}/>
                        <Image source={{uri: 'http://www.thetimes.co.uk/tto/multimedia/archive/00851/82ef9ae8-ae34-11e4-_851122b.jpg'}} style={styles.profilebubble}/>
                      </View>
                    </View>
                    <LinearGradient colors={['transparent', 'transparent', '#1C1C1C']} style={styles.linearGradient}>
                        <TouchableHighlight onPress={Actions.recipedetails} underlayColor='transparent'>
                          <View style={{backgroundColor:'transparent', height: window.width, marginTop:-20}}>
                            <Text style={styles.title}>Recipe Name | 10 Mins</Text>
                          </View>
                        </TouchableHighlight>
                        <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent', marginTop: -75}}>
                           <View style={styles.dietbuble}>
                              <Text style={styles.dietText}>Vegan</Text>
                           </View>
                           <View style={styles.dietbuble}>
                              <Text style={styles.dietText}>Vegie</Text>
                           </View>
                           <View style={{flex: 1, flexDirection: 'row', marginLeft: window.width/3, backgroundColor: 'transparent'}}>
                             <Text style={styles.upvotenum} >20</Text>
                             <Image style={styles.arrow} source={require('image!upvotearrow')}></Image>
                             <Image style={styles.nombtn} source={require('image!nombtn')}></Image>
                            </View>
                        </View>
                      </LinearGradient>
                    </View>
                </Image>
            </View>
        </Swipeout>
        <Seperator/>
        <Swipeout right={list}>
            <View style={styles.container}>
                <Image source={{uri: 'http://www.choosingraw.com/wp-content/uploads/2014/09/IMG_8328.jpg'}} style={{width: window.width, height: window.width}}>
                  <View style={{backgroundColor: 'transparent', marginBottom: 100,}}>
                    <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent'}}>
                      <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent'}}>
                        <Image source={{uri: 'http://cookieandkate.com/images/2014/02/kate-600.jpg'}} style={styles.profilebubble}/>
                        <Image source={{uri: 'http://www.thetimes.co.uk/tto/multimedia/archive/00851/82ef9ae8-ae34-11e4-_851122b.jpg'}} style={styles.profilebubble}/>
                      </View>
                    </View>
                    <LinearGradient colors={['transparent', 'transparent', '#1C1C1C']} style={styles.linearGradient}>
                        <TouchableHighlight onPress={Actions.recipedetails} underlayColor='transparent'>
                          <View style={{backgroundColor:'transparent', height: window.width, marginTop:-20}}>
                            <Text style={styles.title}>Recipe Name | 10 Mins</Text>
                          </View>
                        </TouchableHighlight>
                        <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent', marginTop: -75}}>
                           <View style={styles.dietbuble}>
                              <Text style={styles.dietText}>Vegan</Text>
                           </View>
                           <View style={styles.dietbuble}>
                              <Text style={styles.dietText}>Vegie</Text>
                           </View>
                           <View style={{flex: 1, flexDirection: 'row', marginLeft: window.width/3, backgroundColor: 'transparent'}}>
                             <Text style={styles.upvotenum} >20</Text>
                             <Image style={styles.arrow} source={require('image!upvotearrow')}></Image>
                             <Image style={styles.nombtn} source={require('image!nombtn')}></Image>
                            </View>
                        </View>
                      </LinearGradient>
                    </View>
                </Image>
            </View>
        </Swipeout>
        <Seperator/>
      </ScrollView>
    )
  }
};


module.exports = Recipes;

这是菜谱详情视图：

'use strict';

var React = require('react-native');
var Dimensions = require('Dimensions');
var window = Dimensions.get('window');
var LinearGradient = require('react-native-linear-gradient');
var Tabbar = require('react-native-tabbar');
var Item = Tabbar.Item;
var {
  StyleSheet,
  View,
  Text,
  Component, 
  Image, 
  ScrollView, 
  TouchableHighlight,
} = React;

var styles = StyleSheet.create({
  description: {
    fontSize: 20,
    textAlign: 'center',
    color: '#FFFFFF'
  },
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: 'transparent',
  }, 
  venue_image: {
    width: window.width, 
    height: window.height/4, 
    flex: 1, 
  }, 
  linearGradient: {
    flex: 1,
    paddingLeft: 15,
    paddingRight: 15,
    opacity: 0.9,
    height: window.height/3.7, 
  },
  title: {
    textAlign:'left', 
    fontSize: 15, 
    color: 'white', 
    fontFamily: 'Avenir Next', 
    fontWeight: '500',
  },
  nombtn: {
    height: 30,
    width: 30,
    marginBottom: 5,
  }, 
  arrow: {
    height: 15,
    width: 15,
    marginRight: 20,
    marginTop: 5,
  }, 
  upvotenum: {
    marginRight: 5, 
    fontSize: 20, 
    fontWeight: "600",
    color: 'white',
    fontFamily: 'Avenir Next'
  }, 
  dietbuble: {
    backgroundColor:'transparent', 
    height:20, 
    width:60, 
    borderRadius: 10, 
    backgroundColor:'#49B64D',
    marginRight:5,
  },
  submenutext: {
    fontFamily: 'Avenir Next',
    fontSize: 15,
    fontWeight: '600', 
    color: 'white',
    alignSelf: 'center', 
    marginTop: 10,
  }, 
  undernum: {
    fontFamily: 'Avenir Next',
    fontSize: 30,
    fontWeight: '400', 
    color: 'white',
    alignSelf: 'center', 
  }, 
  units: {
    fontFamily: 'Avenir Next',
    fontSize: 10,
    color: 'white',
    alignSelf: 'center',
  }
});

class VenueDetails extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      selectedTab: 'ingredients',
    };
  }

  _Directions() {
    this.setState({selectedTab: 'directions'});
    console.log(this.state.selectedTab);
  }

  _Nutrition() {
     this.setState({selectedTab: 'nutrition'});
     console.log(this.state.selectedTab);
  }

  _Ingredients() {
    this.setState({selectedTab: 'ingredients'});
    console.log(this.state.selectedTab);
  }

  makeBackground(btn){
    var featurebox = {
     flex: 1,
     height: window.width/4,
     width: window.width/3,
     alignItems: 'center',
     justifyContent: 'center',
    }
    if(btn === 0 || btn === 2){
      featurebox.backgroundColor = '#49B64D';
    } else if (btn === 1){
      featurebox.backgroundColor = '#585858';
    } 
    return featurebox;
  }

  render() {
    return (
      <View style={styles.container}>
        <View style={styles.container}>
            <Image source={{uri: 'http://i.huffpost.com/gadgets/slideshows/404432/slide_404432_5031844_free.jpg'}} style={styles.venue_image}>
              <LinearGradient colors={['transparent', 'transparent', '#1C1C1C']} style={styles.linearGradient}>
                <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent', marginTop: window.height/4.3}}>
                   <View style={{backgroundColor:'transparent', marginRight: window.width/4, marginLeft: 10}}>
                      <Text style={styles.title}>Recipe Name | 10 Mins</Text>
                   </View>
                   <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent'}}>
                     <Text style={styles.upvotenum} >20</Text>
                     <Image style={styles.arrow} source={require('image!upvotearrow')}></Image>
                     <Image style={styles.nombtn} source={require('image!nombtn')}></Image>
                    </View>
                </View>
               </LinearGradient>
            </Image>
        </View>
        <View style={{flex: 1, flexDirection: 'row', backgroundColor: 'transparent'}}>
            <TouchableHighlight 
              onPress={this._Ingredients.bind(this)}
              style={this.makeBackground(0)}
              underlayColor='transparent'>
              <View>
                <Text style={styles.submenutext}>Ingredients</Text>
                <Text style={styles.undernum}>5</Text>
                <Text style={styles.units}>Count</Text>
              </View>
            </TouchableHighlight>
            <TouchableHighlight 
               onPress={this._Nutrition.bind(this)}
               style={this.makeBackground(1)}
               underlayColor='transparent'>
              <View>
                <Text style={styles.submenutext}>Nutrition</Text>
                <Text style={styles.undernum}>200</Text>
                <Text style={styles.units}>Sugars</Text>
              </View>
            </TouchableHighlight>
            <TouchableHighlight 
              onPress={this._Directions.bind(this)}
              style={this.makeBackground(2)}
              underlayColor='transparent'>
              <View>
                <Text style={styles.submenutext}>Directions</Text>
                <Text style={styles.undernum}>10</Text>
                <Text style={styles.units}>Hours</Text>
              </View>
            </TouchableHighlight>
        </View>
        <ScrollView>
        </ScrollView>
      </View>
    );
  }
}

module.exports = VenueDetails;

目前，所有这些看起来像这样：

Answer 1

我要做的是创建一个对象数组，每个对象代表页脚滑块中的不同 views/components。然后，在您的状态上有一个属性，这是活动选项卡，当用户单击新选项卡时，将活动选项卡更新为新索引。我们要做的是，无论活动选项卡是什么，获取您在上面制作的 tabMap 中拥有的特定组件并渲染它。代码看起来像这样。

var tabMap = [
  {key: 0, icon: 'ion|ios-contact-outline', state: 'bio', asArray: false, Component: About},
  {key: 1, icon: 'ion|ios-paper', state: 'posts', asArray: true, Component: Posts},
  {key: 2, icon: 'ion|ios-people', state: 'friends', asArray: false, Component: Friends},
  {key: 3, icon: 'ion|ios-heart', state: 'activity', asArray: false, Component: Activity},
];

所以这代表了下部的不同标签。

getInitialState(){
   return {
      activeTab: 0
   }
}

这是我的初始状态，它将跟踪我在哪个选项卡上。

然后在我的渲染方法中，我抓取当前活动选项卡的组件，

var BodyComponent = tabMap[this.state.activeTabIndex].Component;

现在我有了组件，我可以简单地渲染 BodyComponent，传入任何我想要的数据。

 <BodyComponent
    header={tabMap[this.state.activeTabIndex].header}
    authedUser={this.props.authedUser}
    isGuest={this.props.isGuest}
    userToRender={this.state.userToRender}
    data={this.state[tabMap[this.state.activeTabIndex].state]} />

Answer 2

缺少react-native-router-flux的功能（在一个容器内'tabs'之间切换），我最近添加了它，请检查最新版本。

您需要使用 Container 元素并在其中定义您的路线。您还必须定义 TabBar 实现以与该容器一起使用（检查示例及其 TabBarFlux）

如何在同一屏幕内更改视图（React Native）？

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react-native