jQuery点击事件多次触发

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

.unbind()已弃用，您应该使用.off()方法代替。只需在调用.on()之前调用.off()即可。

这将删除所有事件处理程序:

$(element).off().on('click', function() {
    // function body
});

只删除已注册的'点击'事件处理程序:

$(element).off('click').on('click', function() {
    // function body
});

2014-01-02 10:56:07

其他回答

发生这种情况是因为特定事件多次绑定到同一元素。

对我有效的解决方案是:

使用.die()方法杀死所有附加的事件。

然后附加方法监听器。

因此,

$('.arrow').click(function() {
// FUNCTION BODY HERE
}

应该是:

$('.arrow').die("click")
$('.arrow').click(function() {
// FUNCTION BODY HERE
}

2013-10-10 07:40:04

参考@尖锐的回答。如果在循环中，可以通过这样做避免多次触发单击事件:

 $(".bet").each(function(i,item){
       $(this).on({
            click:function(){
                //TRIGGERS ONES
            if(i){
              console.log(i); 
                //DO YOUR THING HERE
            }
            
            }
        });

});

2021-06-12 08:39:21

要确保单击只执行一次操作，请使用以下命令:

$(".bet").unbind().click(function() {
    //Stuff
});

2013-02-20 22:31:18

$('.bed').one(function(){ })

文档:

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

2019-03-19 23:49:08

更好的选择是使用off

<script>
function flash() {
  $("div").show().fadeOut("slow");
}
$("#bind").click(function() {
  $( "body" )
    .on("click", "#theone", flash)
    .find("#theone")
      .text("Can Click!");
});
$("#unbind").click(function() {
  $("body")
    .off("click", "#theone", flash)
    .find("#theone")
      .text("Does nothing...");
});
</script>

2016-08-08 06:19:26

jQuery点击事件多次触发

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