在下面的代码中，clearTimeout()函数似乎并未清除计时器。请注意:我已经将代码精简了一下，以显示相关部分。有任何想法吗？
var Gallery =
{
next: function()
{
// does stuff
},
close: function()
{
Gallery.slideshow("off");
},
slideshow: function(sw)
{
if (sw == "off") {clearTimeout(timer);}
var timer = setTimeout(function() {Gallery.next();Gallery.slideshow();}, 1000);
},
};
完整代码:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Gallery</title>
<meta name="description" content=" ">
<meta name="author" content=" ">
<link rel="stylesheet" href="scripts/css.css">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>
<!--[if lt IE 9]>
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<script>
var Gallery =
{
// PARAMETERS FOR CUSTOMISATION
gallery_type: "overlay", // overlay(default), inpage, slideshow
transition_speed: 1000, // milliseconds
outer_opacity: 0.7, // 0 to 1 (option available with overlay)
outer_colour: "#000000", // hex value
image_size: "800px",
show_captions: true, // true, false
overlay_slideshow: true, // true, false (option available with overlay)
slideshow_interval: 5000, // milliseconds
slideshow_controls: false, // true, false
fullscreen: false, // true, false (option available with inpage)
thumbs: [],
images: [],
captions: [],
current_image_id: null,
timer: null,
init: function()
{
// CREATE ARRAYS
var gallery_div = document.getElementById("gallery");
gallery_thumbs = gallery_div.getElementsByTagName("img");
for (var i=0; i < gallery_thumbs.length; i++)
{
Gallery.thumbs[i] = gallery_thumbs[i];
Gallery.thumbs[i].rel = [i];
}
for (var i=0; i < gallery_thumbs.length; i++)
{
Gallery.captions[i] = Gallery.thumbs[i].alt;
}
// CREATE OVERLAYS
var body_tag = document.getElementsByTagName("body");
var outer_overlay = document.createElement("div");
outer_overlay.id = "outer";
outer_overlay.style.backgroundColor = Gallery.outer_colour;
var window_height = $(document).height();
outer_overlay.style.height = window_height +'px';
body_tag[0].appendChild(outer_overlay);
var inner_overlay = document.createElement("div");
inner_overlay.id = "inner";
body_tag[0].appendChild(inner_overlay);
var close_button = document.createElement("img");
close_button.src="images/icon-close.png";
close_button.id = "gallery-close";
inner_overlay.appendChild(close_button);
var next_button = document.createElement("img");
next_button.src="images/icon-next.png";
next_button.id = "gallery-next";
inner_overlay.appendChild(next_button);
var prev_button = document.createElement("img");
prev_button.src="images/icon-prev.png";
prev_button.id = "gallery-prev";
inner_overlay.appendChild(prev_button);
var caption_div = document.createElement("div");
caption_div.id = "gallery-caption";
inner_overlay.appendChild(caption_div);
$("#gallery-caption").fadeTo(0, 0);
if (Gallery.show_captions == true) {
inner_overlay.onmouseover = function() {$("#gallery-caption").stop().fadeTo(Gallery.transition_speed/2, 0.5);};
inner_overlay.onmouseout = function() {$("#gallery-caption").stop().fadeTo(Gallery.transition_speed, 0);};
}
// CREATE IMAGES
for (var i=0; i < Gallery.thumbs.length; i++)
{
var new_image = document.createElement("img");
new_image.src = Gallery.thumbs[i].parentNode.href;
new_image.id= "gallery-img" + (i + 1);
inner_overlay.appendChild(new_image);
Gallery.images[i] = new_image;
$(Gallery.images[i]).fadeTo(0, 0);
}
// EVENT HANDLERS FOR OPEN AND CLOSE
for (var i=0; i < Gallery.thumbs.length; i++)
{
Gallery.thumbs[i].onclick = Gallery.open;
}
var outer_overlay = document.getElementById("outer");
outer_overlay.onclick = Gallery.close;
close_button.onclick = Gallery.close;
next_button.onclick = Gallery.next;
prev_button.onclick = Gallery.previous;
},
open: function()
{
Gallery.current_image_id = this.rel;
var current = Gallery.images[Gallery.current_image_id];
var caption_div = document.getElementById("gallery-caption");
caption_div.innerHTML = Gallery.captions[Gallery.current_image_id];
var inner_overlay = document.getElementById("inner");
inner_overlay.style.height = current.height + "px";
// CENTER BUTTONS & OVERLAY
var next_button = document.getElementById("gallery-next");
next_button.style.top = (current.height / 2) -15 + "px";
var prev_button = document.getElementById("gallery-prev");
prev_button.style.top = (current.height / 2) -15 + "px";
$("#inner").css("top", (($(window).height()-$("#inner").height())/2));
$("#inner").css("left", (($(window).width()-$("#inner").width())/2));
$(current).fadeTo(0, 1);
$("#outer").fadeTo(0, Gallery.outer_opacity);
$("#inner").fadeTo(0, 0);
$("#inner").fadeTo(Gallery.transition_speed, 1);
if (Gallery.overlay_slideshow == true) {
Gallery.slideshow();
}
return false;
},
close: function()
{
if (Gallery.timer) {
clearInterval(Gallery.timer);
Gallery.timer = null;
} else {
$("#outer").fadeTo(0, 0);
$("#inner").fadeTo(0, 0);
$("#outer").css("display", "none");
$("#inner").css("display", "none");
var current = Gallery.images[Gallery.current_image_id];
current.style.display = "none";
}
},
next: function()
{
var next_id = Number(Gallery.current_image_id) + 1;
if (next_id == Gallery.images.length) {next_id = 0;}
var next = Gallery.images[next_id];
var current = Gallery.images[Gallery.current_image_id];
var inner_overlay = document.getElementById("inner");
inner_overlay.style.height = next.height + "px";
// CENTER BUTTONS & OVERLAY
var next_button = document.getElementById("gallery-next");
next_button.style.top = (next.height / 2) -15 + "px";
var prev_button = document.getElementById("gallery-prev");
prev_button.style.top = (next.height / 2) -15 + "px";
$("#inner").css("top", (($(window).height()-$("#inner").height())/2));
$("#inner").css("left", (($(window).width()-$("#inner").width())/2));
var caption_div = document.getElementById("gallery-caption");
caption_div.innerHTML = Gallery.captions[next_id];
$(current).fadeTo(Gallery.transition_speed, 0);
$(next).fadeTo(0, 0);
$(next).fadeTo(Gallery.transition_speed, 1);
Gallery.current_image_id = next_id;
},
previous: function()
{
var prev_id = Number(Gallery.current_image_id) - 1;
if (prev_id == -1) {prev_id = Gallery.images.length -1;}
var prev = Gallery.images[prev_id];
var current = Gallery.images[Gallery.current_image_id];
var inner_overlay = document.getElementById("inner");
inner_overlay.style.height = prev.height + "px";
// CENTER BUTTONS & OVERLAY
var next_button = document.getElementById("gallery-next");
next_button.style.top = (prev.height / 2) -15 + "px";
var prev_button = document.getElementById("gallery-prev");
prev_button.style.top = (prev.height / 2) -15 + "px";
$("#inner").css("top", (($(window).height()-$("#inner").height())/2));
$("#inner").css("left", (($(window).width()-$("#inner").width())/2));
var caption_div = document.getElementById("gallery-caption");
caption_div.innerHTML = Gallery.captions[prev_id];
$(current).fadeTo(Gallery.transition_speed, 0);
$(prev).fadeTo(0, 0);
$(prev).fadeTo(Gallery.transition_speed, 1);
Gallery.current_image_id = prev_id;
},
slideshow: function() {
Gallery.close();
Gallery.timer = setInterval(function() {
Gallery.next();
}, 1000);
},
fullscreen: function()
{
}
};
// START SCRIPTS
Start = function()
{
Gallery.init();
};
window.onload = Start;
</script>
</head>
<body>
<div id="gallery">
<a href="images/argentina-river.jpg"><img src="images/thumbs/argentina-river-thumb.jpg" alt="Argentina River"></a>
<a href="images/monte-bre.jpg"><img src="images/thumbs/monte-bre-thumb.jpg" alt="Monte Bre"></a>
<a href="images/romania.jpg"><img src="images/thumbs/romania-thumb.jpg" alt="Romania"></a>
<a href="images/norway.jpg"><img src="images/thumbs/norway-thumb.jpg" alt="Norway"></a>
<a href="images/cloudy-skies.jpg"><img src="images/thumbs/cloudy-skies-thumb.jpg" alt="Cloudy Skies"></a>
<a href="images/field.jpg"><img src="images/thumbs/field-thumb.jpg" alt="Field"></a>
<a href="images/poland.jpg"><img src="images/thumbs/poland-thumb.jpg" alt="Poland"></a>
<a href="images/coconut-trees.jpg"><img src="images/thumbs/coconut-trees-thumb.jpg" alt="Coconut Trees"></a>
<a href="images/volcanic-land.jpg"><img src="images/thumbs/volcanic-land-thumb.jpg" alt="Volcanic Land"></a>
<a href="images/tokyo-city.jpg"><img src="images/thumbs/tokyo-city-thumb.jpg" alt="Tokyo City"></a>
</div>
</body>
</html>
最佳答案
clearTimeout在起作用，但是您立即使用相同的方法对其进行重新设置。因此，它马上又重新启动。您需要有条件地检查是否启动它:
slideshow: function(sw) {
var timer;
if (sw == "off") {
clearTimeout(timer);
} else {
timer = setTimeout(function() { Gallery.next(); }, 1000);
}
}