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

在我的案例中,我使用的是“委托”,所以这些解决方案都不起作用。我相信这是按钮出现多次通过ajax调用,导致多次点击问题。解决方案是使用超时,所以只有最后一次点击被识别:

var t;
$('body').delegate( '.mybutton', 'click', function(){
    // clear the timeout
    clearTimeout(t);
    // Delay the actionable script by 500ms
    t = setTimeout( function(){
        // do something here
    },500)
})

当我处理这个问题时,我总是使用:

$(".bet").unbind("click").bind("click", function (e) {
  // code goes here
}

通过这种方式,我可以在同一笔划中解除绑定并重新绑定。

下面的代码可以在我的聊天应用程序中处理多次鼠标单击触发事件。 if (!e.originalEvent.detail || e.originalEvent.detail == 1) {//你的代码逻辑}

在我的情况下,onclick事件被多次触发,因为我已经做了一个通用的事件处理程序比较

  `$('div').on("click", 'a[data-toggle="tab"]',function () {
        console.log("dynamic bootstrap tab clicked");
        var href = $(this).attr('href');
        window.location.hash = href;
   });`

更改为

    `$('div#mainData').on("click", 'a[data-toggle="tab"]',function () {
        console.log("dynamic bootstrap tab clicked");
        var href = $(this).attr('href');
        window.location.hash = href;
    });`

还必须为静态和动态点击,静态选项卡点击创建单独的处理程序

    `$('a[data-toggle="tab"]').on("click",function () {
        console.log("static bootstrap tab clicked");
        var href = $(this).attr('href');
        window.location.hash = href;
    });`

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。