React Native-在Tabnavigator中动态更改背景颜色 [英] React Native - Change background color in tabnavigator dynamically

问题描述

我想根据我的API响应动态更改标签导航器的背景颜色，所以下面是我的代码

i want to change my tab navigator background color dynamically in based on my API response so below is my code

_TabNavigator.js

const MyTabnav = TabNavigator({
ScreenOne: {
    screen: ({ navigation, screenProps }) => <ScreenOneNav screenProps={{ tabbarNavigation: navigation, ...screenProps }} onNavigationStateChange={null} />,
    navigationOptions: {
        tabBarLabel: 'ScreenOne',
        tabBarIcon: ({ tintColor }) => (
            <View style={[styles.tabViewBox]}>
                 <Text style={[styles.tabText, { color: tintColor }]}>ScreenOne</Text>
            </View>
        )
    }
},
ScreenTwo: {
    screen: ({ navigation, screenProps }) => <ScreenOneNav screenProps={{ tabbarNavigation: navigation, ...screenProps, }} onNavigationStateChange={null} />,
    navigationOptions: {
        tabBarLabel: 'ScreenOne',
        tabBarIcon: ({ tintColor }) => (
            <View style={[styles.tabViewBox]}>
                <Text style={[styles.tabText, { color: tintColor }]}>ScreenTwo</Text>
            </View>
        )
    }
},
ScreenThree: {
    screen: ({ navigation, screenProps }) => <StockNotificationNav screenProps={{ tabbarNavigation: navigation, ...screenProps }} onNavigationStateChange={null} />,
    navigationOptions: {
        tabBarLabel: 'Notifications',
        tabBarIcon: ({ tintColor }) => (
            <View style={[styles.tabViewBox]}>
                 <Text style={[styles.tabText, { color: tintColor }]}>ScreenThree</Text>
            </View>
        )
    }
},
},
 {

    tabBarOptions: {

        style: {
            backgroundColor: white,
            height: 55,
            borderTopColor: 'transparent',
            borderTopWidth: 1,
            paddingRight: 10,
            paddingLeft: 10,
            borderTopWidth: 1,
            borderTopColor: grayPlaceHolder
        },
        showLabel: false,
        showIcon : true,
    },
    tabBarComponent : TabBarBottom,

    initialRouteName: 'ScreenTwo',
    tabBarPosition: 'bottom',
    animationEnabled: false,
    swipeEnabled: false
}, []);


var styles = StyleSheet.create({
tabText: {
    fontSize: 10,
    fontWeight: "600",
    flex: 4,
},
tabViewBox: {
    flex: 1,
    alignItems: "center",
},
 tabIcon: {
    flex: 5,
    alignSelf: "center",
    marginTop: 10
  },
});
export default StocksTabNav;

我想在我的ScreenTwo.js文件中更改其tabnavigtor背景颜色，其中包含API响应代码，根据它，tabnavigator背景颜色(backgroundColor)应根据API更改为黑色或白色响应，那么我该如何实现呢?您的所有建议都是可以的

I want to change my tabnavigtor background color in my ScreenTwo.js file which include API response code on it as per that it tabnavigator background color (backgroundColor) should change as black or white as per API response so how can i achieve this? your all suggestions are appreciable

按照Rahul更新代码后，建议给出以下警告消息

推荐答案

您可以做的是制作一个自定义tabBar组件，并使用javaScript不可变性概念来覆盖tabBarOptions的样式.

what you can do is make one custom tabBar component and using javaScript immutability concept you can override style of tabBarOptions.

     const MyTabnav = TabNavigator({ScreenOne: {
        screen: ({ navigation, screenProps }) => <ScreenOneNav screenProps={{ tabbarNavigation: navigation, ...screenProps }} onNavigationStateChange={null} />,
        navigationOptions: {
            tabBarLabel: 'ScreenOne',
            tabBarIcon: ({ tintColor }) => (
                <View style={[styles.tabViewBox]}>
                     <Text style={[styles.tabText, { color: tintColor }]}>ScreenOne</Text>
                </View>
            )
        }
    },
    ScreenTwo: {
        screen: ({ navigation, screenProps }) => <ScreenOneNav screenProps={{ tabbarNavigation: navigation, ...screenProps, }} onNavigationStateChange={null} />,
        navigationOptions: {
            tabBarLabel: 'ScreenOne',
            tabBarIcon: ({ tintColor }) => (
                <View style={[styles.tabViewBox]}>
                    <Text style={[styles.tabText, { color: tintColor }]}>ScreenTwo</Text>
                </View>
            )
        }
    },
    ScreenThree: {
        screen: ({ navigation, screenProps }) => <StockNotificationNav screenProps={{ tabbarNavigation: navigation, ...screenProps }} onNavigationStateChange={null} />,
        navigationOptions: {
            tabBarLabel: 'Notifications',
            tabBarIcon: ({ tintColor }) => (
                <View style={[styles.tabViewBox]}>
                     <Text style={[styles.tabText, { color: tintColor }]}>ScreenThree</Text>
                </View>
            )
        }
    },
    },
     {

        tabBarOptions: {

            style: {
                backgroundColor: white,
                height: 55,
                borderTopColor: 'transparent',
                borderTopWidth: 1,
                paddingRight: 10,
                paddingLeft: 10,
                borderTopWidth: 1,
                borderTopColor: grayPlaceHolder
            },
            showLabel: false,


         showIcon : true,
        },

//Here Goes Your CustomTabBar Component 
        tabBarComponent : CustomTabBarComponent,
        initialRouteName: 'ScreenTwo',
        tabBarPosition: 'bottom',
        animationEnabled: false,
        swipeEnabled: false
    }, []);

CustomTabBarComponent.js

     const TabBar = (props) => {
          const { navigationState } = props;
          let newProps = props;

            newProps = Object.assign(
              {},
              props,
              {
                style: {

         // get value from redux store and set it here 
                  backgroundColor: 'rgba(0,0,0,0.1)',
                  position: 'absolute',
                  bottom: 0,
                  left: 0,
                  right: 0
                },
                activeTintColor: '#fff',
                inactiveTintColor: '#bbb',
              },
            );


          return <TabBarBottom {...newProps} />;
        };

现在，您可以将此CustomTabBarComponent与Redux存储连接，并可以更改所需的任何Property的值.

Now You can connect this CustomTabBarComponent with Redux store and can change the value of whatever Property you want.

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