▶ 运行代码import React from "react";
import { View, Text, Button, StyleSheet } from "react-native";

export default function App() {
    return (
        
            Hello, React Native!
             alert("点击了")} />
        
    );
}
const styles = StyleSheet.create({
    container: { flex: 1, justifyContent: "center", alignItems: "center" },
    text: { fontSize: 20 }
});