你有一个很好的开始，但你错过了一些项目。你只需要让你的组件更加灵活和可重用（见下面的评论）。

一些注意事项：下面的示例使用ES6 解构、ES6 粗箭头函数、映射函数、扩展运算符和回调函数。此外，您不能将一个可点击元素 ( Modal)包装在另一个可点击元素 ( div) 内。最外面的元素 ( div) 将仅由onClick事件处理程序处理。

工作示例（为简单起见，我没有使用图像，而是使用example.png可点击的占位符标题）：

组件/模态

import React from "react";
import PropTypes from "prop-types";
import {
  Button,
  Dialog,
  DialogActions,
  DialogContent,
  DialogContentText,
  DialogTitle
} from "@material-ui/core";


// "Modal is a pure function that requires 4 parameters in order to display 
// the "<Modal />" component. This function would be the same as a traditional function:
// 
//   function Modal({ deconstructed parameters }) { 
//     return (
//       <Dialog>
//        ...
//      </Dialog>
//     )
//   }

const Modal = ({ description, onCloseModal, openModal, title }) => ( 
  <Dialog
    open={openModal}
    onClose={onCloseModal}
    aria-labelledby="alert-dialog-title"
    aria-describedby="alert-dialog-description"
  >
    <DialogTitle id="alert-dialog-title">{title}</DialogTitle>
    <DialogContent>
      <DialogContentText id="alert-dialog-description">
        {description}
      </DialogContentText>
    </DialogContent>
    <DialogActions>
      <Button onClick={onCloseModal} color="primary">
        Okay
      </Button>
    </DialogActions>
  </Dialog>
);

// PropTypes throws a warning if any of the 4 required params are
// missing! In addition, it ensures that props are consistent in name
// and declaration from parent component to child component.

Modal.propTypes = {
  description: PropTypes.string.isRequired,
  onCloseModal: PropTypes.func.isRequired,
  openModal: PropTypes.bool.isRequired,
  title: PropTypes.string.isRequired
};

export default Modal;

组件/场景

import React, { PureComponent } from "react";
import PropTypes from "prop-types";


// Scenario will be a PureComponent (stateless, but still a class component) 
// that will open the Modal component with a supplied "description" and 
// "title" via a parent callback function named "handleOpenModal"

class Scenario extends PureComponent {
  openModal = () => {
    const { description, handleOpenModal, title } = this.props;
    handleOpenModal({ description, title });
  };

  render = () => (
    <div className="scenario" onClick={this.openModal}>
      <h1>{this.props.imgSrc}</h1>
    </div>
  );
}

Scenario.propTypes = {
  description: PropTypes.string.isRequired,
  handleOpenModal: PropTypes.func.isRequired,
  imgSrc: PropTypes.string.isRequired,
  title: PropTypes.string.isRequired
};

export default Scenario;

组件/场景

import React, { Component } from "react";
import Modal from "../Modal";
import Scenario from "../Scenario/";

// A scenarios variable of an array of objects -- makes it so we don't have to 
// repeat <Scenario title=".." description="..."imgSrc={...} handleOpenModal={..} /> 
// over and over, instead we map over these objects as "props" and spread
// them out inside of "Scenario" like so: <Scenario {...props} />, which 
// would be the same as:  
// <Scenario title={title} description={description} imgSrc={imgSrc} />

const scenarios = [
  {
    title: "Car",
    description: "This is a description for a car.",
    imgSrc: "car.png"
  },
  {
    title: "Home",
    description: "This is a description for a home.",
    imgSrc: "home.png"
  },
  {
    title: "Bed",
    description: "This is a description for a bed.",
    imgSrc: "bed.png"
  },
  {
    title: "Pet",
    description: "This is a description for a pet.",
    imgSrc: "pet.png"
  }
];

// Scenarios is a stateful class component that'll act as the parent 
// for its "Scenario" children. The children will update the parent via 
// "this.handleOpenModal". Meanwhile, "Modal" will sit inside the parent
// waiting for the parent state updates to affect how its rendered. The 
// Modal will close itself via the parent's "this.handleCloseModal"
// class method when the "Okay" button is clicked.

class Scenarios extends Component {
  state = { description: "", openModal: false, title: "" };

  handleOpenModal = ({ description, title }) => {
    this.setState({ description, openModal: true, title });
  };

  handleCloseModal = () => {
    this.setState({ openModal: false });
  };

  render = () => (
    <section className="App-scenarios">
      <h2> Quick Tips </h2>
      <p>Know What to Do in Different Scenarios during an Earthquake</p>
      <div className="scenario-group">
        {scenarios.map(props => (
          <Scenario
            {...props}
            key={props.title} // this is required for React to know that each "Scenario" that is returned by the "map" function is unique and must be handled as individual components (otherwise React will complain and throw a warning)
            handleOpenModal={this.handleOpenModal}
          />
        ))}
      </div>
      <Modal {...this.state} onCloseModal={this.handleCloseModal} />
    </section>
  );
}

export default Scenarios;