Question

UPDATE：

这是展示问题的jsbin example。

基本上，我有以下javascript，它将窗口滚动到页面上的锚点：

 // get anchors with href's that start with "#"
 $("a[href^=#]").live("click", function(){
     var target = $($(this).attr("href"));
     // if the target exists: scroll to it...
     if(target[0]){
         // If the page isn't long enough to scroll to the target's position
         // we want to scroll as much as we can. This part prevents a sudden 
         // stop when window.scrollTop reaches its maximum.
         var y = Math.min(target.offset().top, $(document).height() - $(window).height());
         // also, don't try to scroll to a negative value...
         y=Math.max(y,0);
         // OK, you can scroll now...
         $("html,body").stop().animate({ "scrollTop": y }, 1000);
     }
     return false;
 });

它完美无缺......直到我手动尝试滚动窗口。滚动滚动条或鼠标滚轮时，我需要停止当前的滚动动画......但我不知道该怎么做。

这可能是我的出发点......

$(window).scroll(e){
    if(IsManuallyScrolled(e)){
        $("html,body").stop();
    }
}

...但我不确定如何编码IsManuallyScrolled函数。我在Google Chrome控制台和AFAIK中检查了e（event对象），无法区分手动滚动和jQuery的animate()滚动。

如何区分手动滚动和通过jQuery $.fn.animate函数调用的滚动？

Answer 1

尝试此功能：

$('body,html').bind('scroll mousedown wheel DOMMouseScroll mousewheel keyup', function(e){
 if ( e.which > 0 || e.type == "mousedown" || e.type == "mousewheel"){
  $("html,body").stop();
 }
})

另外，你看到了this tutorial吗？

更新：现代浏览器现在使用"wheel"作为事件，因此我将其包含在上面的代码中。

Answer 2

几天前我遇到了同样的问题。如果你想获得那个结果，你不应该使用jquery的animate函数，你必须使用轮询函数来模拟动画。

我创建了这个类，当调用 ScrollDown.slow（）时，它应该提供一个平滑的向下滚动。

ScrollDown.current=$(window).scrollTop();
ScrollDown.lastValue;
ScrollDown.lastType;
ScrollDown.enabled=true;
ScrollDown.custom=function(value,rate){  //let's say value==='bottom' and rate=10
    if(value==='bottom'){
        value=$(document).height()-$(window).height();
    }
    ScrollDown.current=$(window).scrollTop();
    ScrollDown.lastValue=value;
    (function poll(){
        setTimeout(function(){
            var prev=$(window).scrollTop();  //This is the critical part
            /*I'm saving again the scroll position of the window, remember
            10 ms have passed since the polling has started
            At this rate, if the user will scroll up for down pre!==ScrollDown.current
            And that means I have to stop scrolling.*/
            ScrollDown.current++; //increasing the scroll variable so that it keeps scrolling
            $(window).scrollTop(ScrollDown.current);
            if(ScrollDown.current<ScrollDown.lastValue && ScrollDown.enabled){  
            //ScrollDown.current<ScrollDown.lastValue basically checks if it's reached the bottom
                if(prev!==ScrollDown.current-1){
                /*I'm checking if the user 
                scrolled up or down while the polling has been going on, 
                if the user scrolls up then prev<ScrollDown.current-1, 
                if the user scrolls down then prev>ScrollDown.current-1 
                and at the next poll() the scrolling will stop 
                because ScrollDown.enabled will bet set to false by ScrollDown.stop()*/
                    ScrollDown.stop();
                }
                poll();
            }
        },rate);
    })();
};

ScrollDown.stop=function(){
    ScrollDown.enabled=false;
};

ScrollDown.continue=function(){
    ScrollDown.enabled=true;
    switch (ScrollDown.lastType){
        case "fast":
            ScrollDown.fast(ScrollDown.lastValue);
            break;
        case "normal":
            ScrollDown.normal(ScrollDown.lastValue);
            break;
        case "slow":
            ScrollDown.slow(ScrollDown.lastValue);
            break;
    }
};

ScrollDown.fast=function(value){
    if(!ScrollDown.enabled){
        ScrollDown.continue();
    }else{
        ScrollDown.lastType='fast';
        ScrollDown.custom(value,1);
    }
};
ScrollDown.normal=function(value){
    if(!ScrollDown.enabled){
        ScrollDown.continue();
    }else{
        ScrollDown.lastType='normal';
        ScrollDown.custom(value,10);
    }
};
ScrollDown.slow=function(value){
    if(!ScrollDown.enabled){
        ScrollDown.continue();
    }else{
        ScrollDown.lastType='slow';
        ScrollDown.custom(value,50);
    }
};
function ScrollDown(){}

因此，如果您要调用 ScrollDown.slow（'bottom'），它将开始缓慢滚动直到它到达页面底部，除非您手动向上或向下滚动，然后停止。 / p>

Answer 3

您可以设置一个变量来表示您对animate的调用处于活动状态，然后在滚动处理程序中检查该变量。

window.IsAutoScrolling = true;
$("html,body").stop().animate({ "scrollTop": y }, 1000);
// Do something to set IsAutoScrolling = false, when the animation is done.

$(window).scroll(e){  
if(!window.IsAutoScrolling){  
    $("html,body").stop();  
}

如何区分手动滚动（通过鼠标滚轮/滚动条）与Javascript / jQuery滚动？

UPDATE：

3 个答案: