对setTimeout和clearTimeout的困惑 | 对setTimeout和clearTimeout的困惑

本文介绍了对setTimeout和clearTimeout的困惑的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个按钮，可在div滚动时更改div的背景.背景需要在计时器上进行更改，因此我使用setTimout来执行更改背景的方法.我认为clearTimeout会取消并且设置了超时，因此我将其放在mouseleave事件上.但是，它似乎并没有停止超时.我的逻辑在这里吗?

I have a button that changes the background of a div when its rolled over. the background needs to change on a timer so i have used setTimout to execute methods that change the backgrounds. I thought clearTimeout would cancel and timeouts i have set so i put this on the mouseleave event. However it doesnt seem to stop the timeouts. Is my logic right here?

$("#h2Buzz").mouseenter(function () {
   setTimeout(playV(), 2700);
   setTimeout(playP(), 5400);
});
$("#h2Buzz").mouseleave(function () {
   clearTimeout(playV());
   clearTimeout(playP());
});


function playV() {
    $("#ServicesBackgroundImage2").css("background-image", "url(/images/v.jpg)");
}
function playPn() {

    $("#ServicesBackgroundImage2").css("background-image", "url(/images/p.jpg)");
}

推荐答案

为您的setTimeout分配一个变量，然后将其传递给clearTimeout进行清除，即

Assign a variable to your setTimeout, which you then pass to clearTimeout to clear it, i.e.

var play_timeout = setTimeout("playV()", 2700);
clearTimeout(play_timeout);

(请注意，我在第一个setTimeout参数周围添加了引号)

(Note I added quotes around your first setTimeout argument)

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