katoikia-app/mobile-ui/components/Home.js

import React from 'react';
import {
    Text,
    HStack,
    Box,
    Icon, 
    MaterialIcons,
    Center, 
    Pressable
  } from "native-base";

import { MaterialCommunityIcons } from '@expo/vector-icons';

export default function Home({navigation}){

  const [selected, setSelected] = React.useState(1);

    return (
      
   <Box flex={1} bg="white" safeAreaTop width="100%" maxW="300px" alignSelf="center">
        <Center flex={1}></Center>
        <HStack bg="indigo.600" alignItems="center" safeAreaBottom shadow={6}>
          <Pressable opacity={selected === 0 ? 1 : 0.5} py="3" flex={1} onPress={() => setSelected(0)}>
            <Center>
              <Icon mb="1" as={<MaterialCommunityIcons name={selected === 0 ? 'home' : 'home-outline'} />} color="white" size="sm" />
              <Text color="white" fontSize="12">
                Inicio
              </Text>
            </Center>
          </Pressable>
          <Pressable opacity={selected === 1 ? 1 : 0.5} py="2" flex={1} onPress={() => setSelected(1)}>
            <Center>
              <Icon mb="1" as={<MaterialIcons name="search" />} color="white" size="sm" />
              <Text color="white" fontSize="12">
                 Comunicados
              </Text>
            </Center>
          </Pressable>
          <Pressable opacity={selected === 2 ? 1 : 0.6} py="2" flex={1} onPress={() => setSelected(2)}>
            <Center>
              <Icon mb="1" as={<MaterialCommunityIcons name={selected === 2 ? 'cart' : 'cart-outline'} />} color="white" size="sm" />
              <Text color="white" fontSize="12">
                Reservas
              </Text>
            </Center>
          </Pressable>
          <Pressable opacity={selected === 3 ? 1 : 0.5} py="2" flex={1} onPress={() => setSelected(3)}>
            <Center>
              <Icon mb="1" as={<MaterialCommunityIcons name={selected === 3 ? 'account' : 'account-outline'} />} color="white" size="sm" />
              <Text color="white" fontSize="12">
                Perfil
              </Text>
            </Center>
          </Pressable>
        </HStack>
      </Box>
   
       
    );
}