将类组件转换为函数组件

import React from 'react';

function MyComponent(props) {
  // 组件的代码逻辑
  return (
    // 组件的JSX结构
  );
}

import React from 'react';

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      count: 0
    };
  }

  componentDidMount() {
    console.log('Component mounted');
  }

  handleClick() {
    this.setState({ count: this.state.count + 1 });
  }

  render() {
    return (
      <div>
        <h1>{this.props.name}</h1>
        <p>Count: {this.state.count}</p>
        <button onClick={() => this.handleClick()}>Increment</button>
      </div>
    );
  }
}

export default MyComponent;

import React, { useState, useEffect } from 'react';

function MyComponent(props) {
  const [count, setCount] = useState(0);

  useEffect(() => {
    console.log('Component mounted');
  }, []);

  const handleClick = () => {
    setCount(count + 1);
  };

  return (
    <div>
      <h1>{props.name}</h1>
      <p>Count: {count}</p>
      <button onClick={handleClick}>Increment</button>
    </div>
  );
}

export default MyComponent;