react-router（v4）如何返回？

我认为问题在于绑定：

constructor(props){   super(props);   this.goBack = this.goBack.bind(this); // i think you are missing this}goBack(){    this.props.history.goBack();}.....<button onClick={this.goBack}>Go Back</button>

正如我在发布代码之前所假设的那样：

constructor(props) {    super(props);    this.handleNext = this.handleNext.bind(this);    this.handleBack = this.handleBack.bind(this); // you are missing this line}