前言:
项目有个需求是:跳转路由,在离开页面前,需要弹框询问用户是否确定离开。
react-router<Prompt>组件是可以的,但是,怎么使用antd组件(或者说自定义组件)呢?
请看下面

先看的这个:https://stackoverflow.com/questions/32841757/detecting-user-leaving-page-with-react-router
(1)使用react-router<Prompt>

import { Prompt } from 'react-router'<Prompt  message="你确定要离开嘛?"/>

(2)<Prompt>支持函数

<Prompt  when={true}  message={(location) => {    return window.confirm(`confirm to leave to ${location.pathname}?`);  }}/>

(3)history.block这个是个坑!

import { history } from 'path/to/history';class MyComponent extends React.Component {   componentDidMount() {      history.block(targetLocation => {           // take your action here                return false;      });   }   render() {      //component render here   }}

坑的原因是history.block()方法是不能和<Modal>组件并列使用的,而必须在history.block()内部去调用<Modal>组件(就是注释take your action here那里),这就导致一个问题:<Modal>组件里的 onOk、onCancel 如何返回值给 history.block()的 return 语句(return false/true)的同时,不让history.block()的 return 语句和 <Modal>组件顺序执行呢?

说白点就是,<Modal>组件先显示出来,阻塞后面的 return false/true,等 <Modal>组件的 onOk、onCancel 方法执行后,再 return false/true

我试了几种方法,不行,直到找到这篇文章:
Using React-Router v4 Prompt with custom modal component

(4)在离开页面,路由跳转时,自定义弹框拦截,并询问

  handlePrompt = location => {    if (!this.isSave) {      this.showModalSave(location);      return false;    }    return true;  };  showModalSave = location => {    this.setState({      modalVisible: true,      location,    });  };  closeModalSave = () => {    const { location } = this.state;    const { history } = this.props;    this.setState({      modalVisible: false,    });    history.push({      pathname: `..${location.pathname}`,    });  };  handlePrompt = location => {    if (!this.isSave) {      this.showModalSave(location);      return false;    }    return true;a  };  handleSave = () => {    const { location } = this.state;    const { history } = this.props;    this.isSave = true;    console.log(location.pathname, 'pathname75');    history.push({      pathname: `..${location.pathname}`,    });    this.setState({      modalVisible: false,    });    this.saveAll();  }; <Prompt message={this.handlePrompt}/><Modal title="提示"       visible={modalVisible}       onCancel={this.closeModalSave}       closable={false}       centered       footer={null}><div>是否保存修改?</div><div>      <Button onClick={this.closeModalSave}>            不保存      </Button>       <Button onClick={this.handleSave}>            保存       </Button></div></Modal>

完美实现离开页面,路由拦截的同时,显示自定义模态框!


(完)