javascript - React 状态数组添加值

Question

我确信这是显而易见的事情，然后我会觉得很傻，但我在这里错过了什么？我有类似的东西:

export default class Questions extends Component {

  state = {
    questions: [{value: 'one'}, {value: 'two'}]
  };

  addQuestion = (question) => {
    let questions= this.state.questions
    let newQuestions = [...questions, {value: question}]
    this.setState({
      questions: newQuestions
    })
  };

  render() {
    return (
      <div>
        {this.state.questions.map((question, index) => <p key={index}>{question.value}</p>)}
        <button onClick={this.addQuestion.bind('three')}>Add</button>
      </div>
    )
  }

}

初始状态值显示正常，但是当我单击“添加”时，我从 React 收到一个很长的错误，内容如下:

Uncaught Error: Invariant Violation: Objects are not valid as a React child...

那么，我在这里错过了什么？

Answer 1

最有可能应该是:

{this.addQuestion.bind(this, 'three')}

否则，您将无法在 addQuestion 中访问 this.state:

let questions= this.state.questions