我试图在Javascript中编写一个视频扑克游戏,作为一种获得它的基础知识的方式,我遇到了一个问题,jQuery点击事件处理程序被多次触发。

They're attached to buttons for placing a bet, and it works fine for placing a bet on the first hand during a game (firing only once); but in betting for the second hand, it fires the click event twice each time a bet or place bet button is pressed (so twice the correct amount is bet for each press). Overall, it follows this pattern for number of times the click event is fired when pressing a bet button once--where the ith term of the sequence is for the betting of the ith hand from the beginning of the game: 1, 2, 4, 7, 11, 16, 22, 29, 37, 46, which appears to be n(n+1)/2 + 1 for whatever that's worth--and I wasn't smart enough to figure that out, I used OEIS. :)

这是一个点击事件处理程序的函数;希望这很容易理解(如果不容易,请告诉我,我也想在这方面做得更好):

/** The following function keeps track of bet buttons that are pressed, until place button is pressed to place bet. **/
function pushingBetButtons() {
    $("#money").text("Money left: $" + player.money); // displays money player has left

    $(".bet").click(function() {
        var amount = 0; // holds the amount of money the player bet on this click
        if($(this).attr("id") == "bet1") { // the player just bet $1
            amount = 1;
        } else if($(this).attr("id") == "bet5") { // etc.
            amount = 5;
        } else if($(this).attr("id") == "bet25") {
            amount = 25;
        } else if($(this).attr("id") == "bet100") {
            amount = 100;
        } else if($(this).attr("id") == "bet500") {
            amount = 500;
        } else if($(this).attr("id") == "bet1000") {
            amount = 1000;
        }
        if(player.money >= amount) { // check whether the player has this much to bet
            player.bet += amount; // add what was just bet by clicking that button to the total bet on this hand
            player.money -= amount; // and, of course, subtract it from player's current pot
            $("#money").text("Money left: $" + player.money); // then redisplay what the player has left
        } else {
            alert("You don't have $" + amount + " to bet.");
        }
    });

    $("#place").click(function() {
        if(player.bet == 0) { // player didn't bet anything on this hand
            alert("Please place a bet first.");
        } else {
            $("#card_para").css("display", "block"); // now show the cards
            $(".card").bind("click", cardClicked); // and set up the event handler for the cards
            $("#bet_buttons_para").css("display", "none"); // hide the bet buttons and place bet button
            $("#redraw").css("display", "block"); // and reshow the button for redrawing the hand
            player.bet = 0; // reset the bet for betting on the next hand
            drawNewHand(); // draw the cards
        }
    });
}

如果你有任何想法或建议,或者我的问题的解决方案与这里的另一个问题的解决方案相似,请告诉我(我看过许多类似标题的帖子,但没有幸运地找到一个适合我的解决方案)。


当前回答

。()

更好的选择是.one():

每个事件类型的每个元素最多执行一次处理程序。

$(".bet").one('click',function() {
    //Your function
});

如果有多个类,且每个类需要点击一次,

$(".bet").on('click',function() {
    //Your function
    $(this).off('click');   //or $(this).unbind()
});

其他回答

$(element).click(function (e)
{
  if(e.timeStamp !== 0) // This will prevent event triggering more then once
   {
      //do your stuff
   }
}
$('.bed').one(function(){ })

文档:

http://api.jquery.com/one/

在我的例子中,我用<script>标记在页面上加载了两次相同的*.js文件,所以两个文件都将事件处理程序附加到元素上。我删除了重复的声明,这就解决了问题。

如果你这样写:

$(文档).off(“点击”)。on("click", "#btnID", function(){})

然后,它将禁用所有项目的单击事件。

如果您只是想关闭单击特定的按钮,请执行此操作

美元(文件)。关掉(“点击”、“# btnID”)。on(点击,btnID,功能)

Unbind()有效,但将来可能会导致其他问题。处理程序在另一个处理程序内部时会触发多次,所以让你的处理程序在外部,如果你想要嵌套的处理程序的值,将它们分配给一个全局变量,它将被你的处理程序访问。