如果当前标签处于活动状态,我想更改文本颜色。我是怎么做到的?
import React from 'react';
import { StyleSheet, View } from 'react-native';
import { NavigationContainer } from '@react-navigation/native';
import { BottomTabBar, createBottomTabNavigator } from '@react-navigation/bottom-tabs';
import { FontAwesome as Icon, Entypo as Icon2 } from '@expo/vector-icons';
import { createStackNavigator } from '@react-navigation/stack';
import { TabBarAdvancedButton } from '../components';
import { EmptyScreen } from '../screens';
import { IS_IPHONE_X } from '../utils';
const BottomBar = createBottomTabNavigator();
const Stack = createStackNavigator();
type Props = {
barColor: string;
};
export const TabBar: React.FC<Props> = ({ barColor }) => (
<NavigationContainer>
<BottomBar.Navigator
tabBar={(props) => (
<View style={styles.navigatorContainer}>
<BottomTabBar
{...props}
/>
{IS_IPHONE_X && (
<View style={[styles.xFillLine, {
backgroundColor: barColor
}]}/>
)}
</View>
)}
tabBarOptions={{
style: styles.navigator,
showLabel: true,
labelStyle: {
fontFamily: 'montserrat-regular',
paddingBottom: 8,
color: '#333',
},
tabStyle: {
backgroundColor: barColor,
},
}}
>
<BottomBar.Screen
name="Home"
component={EmptyScreen}
options={{
tabBarIcon: ({ color, focused }) => (
<Icon2
name="home"
size={28}
color={focused ? '#C71FF7' : color}
/>
)
}}
/>
<BottomBar.Screen
name="Profile"
component={EmptyScreen}
options={{
tabBarIcon: ({ color, focused }) => (
<Icon
name="user"
size={28}
color={focused ? '#C71FF7' : color}
/>
)
}}
/>
<BottomBar.Screen
name="Rocket"
component={EmptyScreen}
options={{
tabBarButton: (props) => (
<TabBarAdvancedButton
bgColor={barColor}
{...props}
/>
)
}}
/>
<BottomBar.Screen
name="Messages"
component={EmptyScreen}
options={{
tabBarIcon: ({ color, focused }) => (
<Icon
name="wechat"
size={28}
color={focused ? '#C71FF7' : color}
/>
)
}}
/>
<BottomBar.Screen
name="Settings"
component={EmptyScreen}
options={{
tabBarIcon: ({ color, focused }) => (
<Icon
name="gear"
size={28}
color={focused ? '#C71FF7' : color}
/>
)
}}
/>
</BottomBar.Navigator>
</NavigationContainer>
);
const styles = StyleSheet.create({
container: {
flex: 1,
},
navigatorContainer: {
position: 'absolute',
height: 60,
bottom: 0,
left: 0,
right: 0,
shadowColor: "#000",
shadowOffset: {
width: 0,
height: 1,
},
shadowOpacity: 0.22,
shadowRadius: 2.22,
},
navigator: {
borderTopWidth: 0,
backgroundColor: 'transparent',
elevation: 30,
height: 60
},
xFillLine: {
position: 'absolute',
bottom: 0,
left: 0,
right: 0,
height: 34
}
});
..................................... ………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………… ...
答案 0 :(得分:1)
您可以使用 tabBarLabel
道具,它的工作原理类似于您的代码中使用的 tabBarIcon
道具。
options={{
tabBarLabel: ({focused, color, size}) => (
<Text style={{color: focused ? 'red' : color}}>Updates</Text>
),
}}
完整示例:
const Tab = createBottomTabNavigator();
function MyTabs() {
return (
<Tab.Navigator>
<Tab.Screen
options={{
tabBarLabel: ({focused, color, size}) => (
<Text style={{color: focused ? 'red' : color}}>Updates</Text>
),
tabBarIcon: ({color, size}) => (
<MaterialCommunityIcons name="bell" color={color} size={size} />
),
}}
name="Home"
component={HomeScreen}
/>
<Tab.Screen
options={{
tabBarLabel: ({focused, color, size}) => (
<Text style={{color: focused ? 'red' : color}}>Settings</Text>
),
tabBarIcon: ({color, size}) => (
<MaterialCommunityIcons
name="account-settings"
color={color}
size={size}
/>
),
}}
name="Settings"
component={SettingsScreen}
/>
</Tab.Navigator>
)
}
有关 Tab.Navigator
道具的更多详细信息:here