使用React-导航V5编辑底部选项卡导航上的中间按钮

npm install @react-navigation/native
npm install @react-navigation/bottom-tabs

import React from 'react';
import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';
import { Ionicons } from '@expo/vector-icons';
import { TouchableOpacity } from 'react-native';

// 导入其他屏幕组件
import HomeScreen from './HomeScreen';
import ProfileScreen from './ProfileScreen';
import AddScreen from './AddScreen';

const Tab = createBottomTabNavigator();

const BottomTabNavigator = () => {
  return (
    <Tab.Navigator
      tabBarOptions={{
        showLabel: false, // 隐藏标签文本
      }}
    >
      <Tab.Screen
        name="Home"
        component={HomeScreen}
        options={{
          tabBarIcon: ({ focused }) => (
            <Ionicons name="home" size={24} color={focused ? 'blue' : 'gray'} />
          ),
        }}
      />
      <Tab.Screen
        name="Add"
        component={AddScreen}
        options={({ navigation }) => ({
          tabBarButton: () => (
            <TouchableOpacity
              style={{
                top: -30, // 调整按钮位置
                justifyContent: 'center',
                alignItems: 'center',
                backgroundColor: 'blue',
                borderRadius: 30,
                width: 60,
                height: 60,
              }}
              onPress={() => navigation.navigate('Add')}
            >
              <Ionicons name="add" size={32} color="white" />
            </TouchableOpacity>
          ),
        })}
      />
      <Tab.Screen
        name="Profile"
        component={ProfileScreen}
        options={{
          tabBarIcon: ({ focused }) => (
            <Ionicons name="person" size={24} color={focused ? 'blue' : 'gray'} />
          ),
        }}
      />
    </Tab.Navigator>
  );
};

export default BottomTabNavigator;

import React from 'react';
import { NavigationContainer } from '@react-navigation/native';
import BottomTabNavigator from './BottomTabNavigator';

const App = () => {
  return (
    <NavigationContainer>
      <BottomTabNavigator />
    </NavigationContainer>
  );
};

export default App;