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useState 使用也和react一样，其他也一样就不多举例

import React, {
    Component, useState } from 'react';import {
     View,  Text,  StyleSheet,  Button} from 'react-native';export default function Flex () {
     const [count, setCount] = useState(0)  const addCount = () => {
       let newCount = count    setCount(newCount += 1)  }  handelClick = () => {
       alert('dianji')  }  return (    
         
    
     {
   count}
          
          
            
            Image source={
   require('./img/dask.gif')} style={
   {
    width: 300, height: 300 }}>        
            
            
               
      
       Hello World!
              
           
          
        
     )}const styles = StyleSheet.create({
     container: {
       width: 100,    height: 100,    margin: 10,    backgroundColor: 'gray'  },  text: {
       fontSize: 20, margin: 20  }})

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