javascript - 重新启动游戏 jQuery 函数不起作用

Question

我正在使用jQuery Based Memory Game在我的网站上。您可以随时重新开始游戏。效果很好。现在我完成了游戏，然后我点击“再玩一次”。如果我点击重新启动，它就不再起作用了。为什么以及如何修复它？

这是一个fiddle .

JS:

// this script shows how you can get info about the game
    var game = jQuery('div.slashc-memory-game'); // get the game
    var info = jQuery('p#info').find('span'); // get the info box
    var restart = jQuery('a#restart').css('visibility', 'visible'); // get the play again link
    var playAgain = jQuery('a#play-again').css('visibility', 'hidden'); // get the play again link
    // format time like hh:mm:ss
    var formatTime = function(s)
    {
        var h = parseInt(s / 3600), m = parseInt((s - h * 3600) / 60); s = s % 60;
        return (h < 10 ? '0' + h : h) + ':' + (m < 10 ? '0' + m : m) + ':' + (s < 10 ? '0' + s : s);
    }
    // listen for game 'done' event 
    game.bind('done', function(e)
    {
        // show basic stats
        var stats = game.slashcMemoryGame('getStats');
        info.html('Success ! Number of clicks : ' + stats.numClicks + ', elapsed time : ' + formatTime(parseInt(stats.time / 1000)) + '.');
        playAgain.css('visibility', 'visible'); // show link
        restart.css('visibility', 'hidden'); // show link
    });
            // Restart action
    restart.click(function(e)
    {
        game.slashcMemoryGame('restart'); // restart game
    });
    // play again action
    playAgain.click(function(e)
    {
        playAgain.css('visibility', 'hidden'); // hide link
        info.html('Memory Game, click to reveal images. <a id="restart" href="#">Restart</a>'); // reset text
        game.slashcMemoryGame('restart'); // restart game
        e.preventDefault();
    });

HTML:

<p id="info"><span>Memory Game, click to reveal images. <a id="restart" href="#">Restart</a></span> <a id="play-again" href="#">Play Again</a></p>

Answer 1

每当您在此行单击 #play-again 时，您就会替换 #restart 元素:

info.html('Memory Game, click to reveal images. <a id="restart" href="#">Restart</a>');

这意味着 #restart 元素的点击处理程序不再附加到新元素。

您应该使用委托(delegate)事件处理程序将处理程序附加到始终存在于 DOM 中的祖先元素 .on() :

info.on('click', '#restart', function(e)
{
    game.slashcMemoryGame('restart'); // restart game
});

Fiddle

我用委托(delegate)事件处理程序替换了#restart 元素的直接绑定(bind)事件处理程序。以下是额外阅读的引用:Direct and delegated events 。基本上，您只能将事件处理程序绑定(bind)到 DOM 中当前的元素，并且:

Delegated events have the advantage that they can process events from descendant elements that are added to the document at a later time.