javascript - 使用reactjs在tic tac toe应用程序中渲染图像

Question

我正在尝试使用reactjs创建一个简单的井字棋应用程序，其中有两种模式:经典和图像，在经典模式下我可以选择显示 X 和 O，在图像模式下，我可以选择两个显示下面提到的两个图像。我的文件结构是:

src
  components
    ChooseGameMode.js
    choosePlayer.js
    GameStatus.js
    Status.js
  images
    connery.svg
    square.svg
App.css
App.js
index.css
index.js
...

以下是我开发的代码:

App.js

import React, { Component } from 'react';

import './App.css';

import Status from'./components/Status';
import GameStatus from'./components/GameStatus';

class App extends Component {


  constructor(props){

    super(props)

    this.state = {

      board : Array(9).fill(null),
      player : null,
      winner : null,
      gamemode : null,
      /* array to store the ndex */
      order_ndex : []
    }

  }

  checkWinner(){

    let winLines =
      [
        ["0", "1", "2"],
        ["3", "4", "5"],
        ["6", "7", "8"],
        ["0", "3", "6"],
        ["1", "4", "7"],
        ["2", "5", "8"], 
        ["0", "4", "8"],
        ["2", "4", "6"]
      ]

    this.checkmatch(winLines)
  }

  checkmatch(winLines){
    let board = this.state.board;
    for (let index = 0; index < winLines.length; index++) {
      const [a,b,c]=winLines[index];
      if(board[a] && board[a] === board[b] && board[a] === board[c] ){
        alert('You won!');
        this.setState({
          winner : this.state.player
        })
        this.state.winner = this.state.player;
      }
    }
    if(!this.state.winner && !board.includes(null)){
      this.state.winner = 'None';
      alert('Its a Draw!');
    }
  }

  handleClick(index){

    //To render images on selecting ImageMode mode
    const images ={
      connery : require('./images/connery.svg'),
      square : require('./images/square.svg')
    }


    if(this.state.player && !this.state.winner && this.state.gamemode === "Classic"){

      let newBoard = this.state.board

      if(this.state.board[index]===null){

        newBoard[index] = this.state.player
        /* push the last index into the array */
        this.state.order_ndex.push(index) 
        this.setState({
          board: newBoard,
          player: this.state.player==="X" ? "O" : "X"
        })

        this.checkWinner()

      }
    }

    else{

      let newBoard = this.state.board

      if(this.state.board[index]===null){

        newBoard[index] = this.state.player
        /* push the last index into the array */
        this.state.order_ndex.push(index) 
        this.setState({
          board: newBoard,
          player: this.state.player=== images.connery ? images.square : images.connery
        })

        this.checkWinner()

      }

    }
  } 

  setPlayer(player){
    this.setState({player})

  }

  setGameMode(gamemode){
    console.log(gamemode)
    this.setState({gamemode})

  }

  renderBoxes(){
    return this.state.board.map(
      (box, index) => 
      <div className="box" key={index} 
        onClick={()=> {this.handleClick(index)}}>
        {box}
      </div>
    )
  }

  reset(){

    this.setState({
      board : Array(9).fill(null),
      player :  null,
      winner : null,
      gamemode : null,
      order_ndex : []

    })

  } 

  undo() {
    let ndex = this.state.order_ndex.pop() 
    let newBoard = this.state.board
    let prev = newBoard[ndex]
    newBoard[ndex] = null
    this.setState({
      board: newBoard,
      player: prev
    })
  }

  render() {


    return (

      <div className="container">
        <h1>Tic Tac Toe App</h1>

        <GameStatus 
          gamemode ={this.state.gamemode} 
          setGameMode = {(e)=> this.setGameMode(e)}
        />

        <Status
          player={this.state.player} 
          setPlayer={(e) => this.setPlayer(e)}
          winner = {this.state.winner}
        />

        <div className="board">

          {this.renderBoxes()}

        </div>
        <div className="btn">
          <button className='reset' onClick = {() => this.reset()}> Reset </button>
          <div className="divider"/>
          <button className='reset' disabled ={this.state.winner} onClick = {() => this.undo()}> Undo </button>
        </div>

      </div>

    );
  }
}

export default App;

ChooseGameMode.js

import React, { Component } from 'react';

class ChooseGameMode extends Component{

    handleForm(e){
        e.preventDefault();
        this.props.gamemode(e.target.gamemode.value);
    }

    render(){
        return (
            <form onSubmit={(e)=> this.handleForm(e)}>
                <label>
                    Classic
                    <input type="radio" name="gamemode" value="Classic"/>
                </label>

                <label>
                    Frontenddevlandia
                    <input type="radio" name="gamemode" value="Frontenddevlandia"/>
                </label>

                <input type="submit" value="Submit" />
            </form>
        )

    }
}

export default ChooseGameMode;

choosePlayer.js

import React, { Component } from 'react';

class Player extends Component{

    handleForm(e){
        e.preventDefault();
        this.props.player(e.target.player.value);
    }

    render(){
        return (
            <form onSubmit={(e)=> this.handleForm(e)}>
                <label>
                    Player X
                    <input type="radio" name="player" value="X"/>
                </label>

                <label>
                    Player O
                    <input type="radio" name="player" value="O"/>
                </label>

                <input type="submit" value="Start" />
            </form>
        )

    }
}

export default Player;

GameStatus.js

import React, { Component } from 'react';

import ChooseGameMode from'./ChooseGameMode';


class GameStatus extends Component {

    handleSetGameMode(e){
        this.props.setGameMode(e)
    }

    render(){

        return (this.props.gamemode ? 
              <h3>You are playing the {this.props.gamemode} mode</h3> : 
              <ChooseGameMode gamemode={(e) => this.handleSetGameMode(e)} />
        )
    }
}

export default GameStatus;

Status.js

import React, { Component } from 'react';

import Player from'./choosePlayer';

class Status extends Component {

    handleSetPlayer(e){
        this.props.setPlayer(e)
    }

    renderHtml(){
        if (this.props.winner){
            return (<h2>Winner is {this.props.winner}</h2>)
        } else {
            return this.props.player ? 
            <h2>Next player is {this.props.player}</h2> : 
            <Player player={(e) => this.handleSetPlayer(e)} />
        }
    }

    render(){

        return (<span>{this.renderHtml()}</span>)
    }
}

export default Status;

当我选择图像模式并选择播放器而不是渲染图像时，它只是将图像文件的路径渲染到应用程序中。我使用 require('./images/connery.svg'), 来渲染图像。我可以知道我做错了什么吗，我也没有在这里使用 Redux 进行状态管理，因为我是学习 React 和 Redux 的新手，有人可以帮助我如何将 Redux 实现到这个现有的应用程序中，以便状态可以以更好的方式处理管理，而不是将状态作为不同组件的单独 Prop 传递？关于如何实现这一点的总体想法以及任何其他改进或建议也将非常有帮助。另外，正如建议的，这是我的 codesandbox link .

Answer 1

要使用图像，您不需要修改经典代码，只需更新工作经典代码中的 renderBoxes() 并删除添加到其他部分的 Image 条件即可例如 App.js handleClick() 中的代码。

const connery = require("./images/connery.svg"); // or import connery from "./images/connery.svg"
const square = require("./images/square.svg");

  ...
  
  renderBoxes() {
    
    const isFrontend = this.state.gamemode === 'Image'
  
    return this.state.board.map((box, index) => (
      <div
        className="box"
        key={index}
        onClick={() => {
          this.handleClick(index);
        }}
      >
        {box === "X" && isFrontend && <img src={connery} />}
        {box === "O" && isFrontend && <img src={square} />}
        {!isFrontEnd && box}
      </div>
    ));
  }

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>

为了让你的问题下次在我看来不那么麻烦，你可以将你的代码托管在 https://codesandbox.io/s并仅在此处显示问题。