React将变量对象传递给setState，而将匿名对象传递给setState

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

  handleClick() {
    const newCount = this.state.count + 1;
    const newMessage = 'Updated message';
    const newState = {
      count: newCount,
      message: newMessage
    };
    this.setState(newState);
  }

  render() {
    return (
      <div>
        <p>Count: {this.state.count}</p>
        <p>Message: {this.state.message}</p>
        <button onClick={() => this.handleClick()}>Update</button>
      </div>
    );
  }
}