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更新for循環內的javascript對象屬性?

[英]Update javascript object properties inside of a for loop?

我正在用javascript制作一個井字游戲,我現在正試圖讓我的x和o出現在我點擊空格(div)時。 我有我的系統,以便我的ticTacToe()對象“游戲”可以通過它的對象原型更新。

問題是因為我使用for循環將click事件處理程序附加到具有“space”類的所有div,我無法訪問該范圍內“游戲”對象的屬性。 如果我使用“this”,我指的是div本身。 我已經嘗試制作原型函數和構造函數來更新游戲對象的“currentPlayer”,“board”和“turn”屬性,但我無法讓瀏覽器識別屬性在游戲中賓語。

HTML

<!DOCTYPE html>
<html>
<head>
  <title>Tic-Tac-Toe</title>
  <link href="style.css" rel="stylesheet" type="text/css" />
  <script src="js/script2.js"></script>
</head>
<body>

  <div id="gameBoard">
    <h1 id="msg">Welcome to Tic-Tac-Toe</h1>
    <div id="tl" class="space"></div>
    <div id="tm" class="space"></div>
    <div id="tr" class="space"></div>
    <div id="ml" class="space"></div>
    <div id="mm" class="space"></div>
    <div id="mr" class="space"></div>
    <div id="bl" class="space"></div>
    <div id="bm" class="space"></div>
    <div id="br" class="space"></div>
  </div>
</body>
</html>

JS

function ticTacToe() {
  this.board = [[0,0,0]
               [0,0,0]
               [0,0,0]];
  this.turn = 0;
  this.currentPlayer = 1;
}

ticTacToe.prototype = {
  status: function(){
    console.log("The number of turns played is " + this.turn +
    " and it is player " + this.currentPlayer + "'s turn.");
  },
  attachClicks: function(){
    var spaces = document.getElementsByClassName("space"),
        player = this.currentPlayer;
    for(var i = 0; i<spaces.length; i++){
      spaces[i].addEventListener('click',function(){
        if(player == 1){
          this.style.backgroundImage = "url('x.png')";
          //Update ticTacToe's turn, player, and board
        }
        else {
          this.style.backgroundImage = "url('o.png')";
          //Update ticTacToe's turn, player, and board
        }
      })
    }
  }
}

var game = new ticTacToe();

window.onload = function(){
  game.attachClicks();
}

將另一個變量綁定this

  attachClicks: function(){
    var game = this;
    var spaces = document.getElementsByClassName("space")
    for(var i = 0; i<spaces.length; i++){
      spaces[i].addEventListener('click',function(){
        if(player == 1){
          this.style.backgroundImage = "url('x.png')";
          //Update ticTacToe's turn, player, and board
        }
        else {
          this.style.backgroundImage = "url('o.png')";
          //Update ticTacToe's turn, player, and board
        }
      })
    }

然后你可以在事件監聽器函數中引用game.boardgame.currentPlayer來訪問當前的tictactoe對象。

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