触摸事件触发两次 [英] touch events firing twice

问题描述

我在移动设备/平板电脑上遇到了问题，事件触发了两次.当我单击以下功能时，应该下拉的菜单将下拉然后立即向上滑动.这只是触摸设备的问题.

I am having problems on mobile devices/tablets with the events firing twice. When I click the following function, the menu that is supposed to drop down will drop down then immediataly slide back up. It is only an issue with touch devices.

$(document).on("touchend click", ".lines-button", function(e){

    e.stopImmediatePropagation();
    if($(this).hasClass("close")){
        $(this).removeClass("close");
        $(".widget1x1Back").next(".actionsHolder3").slideUp("fast", function() {
            $(this).remove();
        });             
    }else{

        var iconsList = $(this).closest(".top1x1").next(".hdnActnLst").find(".iconsHolder3").html();
        $(this).closest(".widget1x1").append(iconsList);
        $(this).closest(".widget1x1").find(".actionsHolder3").hide();
        $(this).closest(".widget1x1").find(".actionsHolder3").slideDown(700,"easeOutBack");
        $(this).addClass("close");
    }
});

任何输入都会很棒，谢谢！

Any input would be great, thanks!!

推荐答案

您的问题是您的函数被触发了两次(每种事件类型一次). 请参阅(我使用了mousedown和 DEMO ). click就像我现在在台式机上一样-但原理相同).

Your issue is that your function is getting triggered twice (once for each event type). See the DEMO here (I used mousedown and click as I am on a desktop right now - but its the same principle).

您需要捕获并处理对该事件的重复调用. 您可以尝试设置一个处理的布尔值，以便click事件知道touch事件是否处理了该事件(touch事件应该首先触发).像这样...

You need to catch and handle duplicate calls to the event. You could try setting a handled boolean so the click event knows if the touch event handled the event or not (the touch event should be firing first). Something like this...

var handled = false;
$(document).on("touchend click", ".lines-button", function(e){
    e.stopImmediatePropagation();

    if(e.type == "touchend") {
        handled = true;
        handleIt();
    }
    else if(e.type == "click" && !handled) {
        handleIt();
    }
    else {
        handled = false;
    }
});

function handleIt() { 
        if($(this).hasClass("close")){
            $(this).removeClass("close");
            $(".widget1x1Back").next(".actionsHolder3").slideUp("fast", function() {
                $(this).remove();
            });             
        }else{

            var iconsList = $(this).closest(".top1x1").next(".hdnActnLst").find(".iconsHolder3").html();
            $(this).closest(".widget1x1").append(iconsList);
            $(this).closest(".widget1x1").find(".actionsHolder3").hide();
            $(this).closest(".widget1x1").find(".actionsHolder3").slideDown(700,"easeOutBack");
            $(this).addClass("close");  
        } 
}

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