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tic tac应用程序，其中包含两种模式：经典和 Image ，在经典模式下，我可以选择显示X和O，而在图像模式下，我有两个选项显示两个图像，如下所述。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
...

下面是我开发的代码：

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呈现到应用程序中。我使用require('./images/connery.svg'),来渲染图像。我可以知道我做错了什么，我也没有在这里使用Redux来进行国家管理，因为我刚开始学习，有人能帮助我如何在这个现有的应用程序中实现redux，这样就可以更好地处理状态管理，而不是把状态作为不同组件的单独支持传递给我吗？一个关于如何实现这个和任何其他改进或建议的总体想法也将是非常有帮助的。而且，正如建议的那样，这是我的码箱链接。

Answer 1

要使用图像，不需要修改经典代码，只需在工作的经典代码中更新renderBoxes()，并删除添加到代码的其他部分(例如App.js handleClick() )中的Image条件。

​

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>

​

为了使您的问题不那么麻烦，海事组织，您可以在https://codesandbox.io/s上托管您的代码，只需在这里显示问题。