问添加到数组中

EN

class Movie extends React.Component {
  constructor(props) {
    super(props);
    this.state = {value: ''};
    this.state = {list: []};//this line shows a waring    

    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
    this.addMovie = this.addMovie.bind(this);

  }

  handleChange(event) {
    this.setState({value: event.target.value});
  }

  handleSubmit(event) {
    alert('A movie was submitted: ' + this.state.value);
    event.preventDefault();
    this.addMovie();

  }

  addMovie(value){      
    this.setState({ list: [...this.state.list, value] });       
  }
  render() {
    return (
      <form onSubmit={this.handleSubmit}>
        <label> 
          Movie name:
          <input type="text" value={this.state.value} onChange={this.handleChange} />
        </label>
        <input type="submit" value="Submit" /> 
      </form>
    );
  }
}

ReactDOM.render(
  <Movie />,
  document.getElementById('root')
);