JavaScript 延时效果:每秒显示 30 张图像(了解更多详细信息)
我有一位客户,他为自己的作品集网站制作了一本“视觉日记”,其中包含他 365 天每天拍摄一次的照片。他希望我将这些组合成一个延时效果片。我想过使用 Flash,但最终选择了 JavaScript。
需要发生的是:图像循环非常非常快,没有过渡或任何东西,只是图像-图像-图像等。大约 30/fps 或类似的东西。当您单击闪烁的图像时,它会停在您选择的图像上,以便用户查看。当您再次单击时,幻灯片将再次开始播放。
我的问题是我是一个 PHP/XHTML/CSS 爱好者,对 JavaScript 并不是很了解。我可以很高兴地将它集成到任何页面中,但只是编写 JavaScript 代码让我感到困扰。
在他的主页上,我有这段代码用于显示基本的幻灯片 - 带有过渡效果等。它在 HTML 中,但我确信您可以理解代码:
<!-- Code for slideshow -->
<!-- Found on http://www.webdeveloper.com/forum/showthread.php?t=81441 -->
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
// Set slideShowSpeed (milliseconds)
var slideShowSpeed = 3000;
// Duration of crossfade (seconds)
var crossFadeDuration = 3;
// Specify the image files
var Pic = new Array();
// to add more images, just continue
// the pattern, adding to the array below
Pic[0] = '1.jpg'
Pic[1] = '2.jpg'
Pic[2] = '3.jpg'
Pic[3] = '4.jpg'
Pic[4] = '5.jpg'
Pic[5] = '6.jpg'
Pic[6] = '7.jpg'
Pic[7] = '8.jpg'
Pic[8] = '9.jpg'
Pic[9] = '10.jpg'
Pic[10] = '11.jpg'
Pic[11] = '12.jpg'
Pic[12] = '13.jpg'
Pic[13] = '14.jpg'
Pic[14] = '15.jpg'
Pic[15] = '16.jpg'
Pic[16] = '17.jpg'
Pic[17] = '18.jpg'
Pic[18] = '19.jpg'
Pic[19] = '20.jpg'
// do not edit anything below this line
var t;
var j = 0;
var p = Pic.length;
var preLoad = new Array();
for (i = 0; i < p; i++) {
preLoad[i] = new Image();
preLoad[i].src = Pic[i];
}
function runSlideShow() {
if (document.all) {
document.images.SlideShow.style.filter="blendTrans(duration=2)";
document.images.SlideShow.style.filter="blendTrans(duration=crossFadeDuration)";
document.images.SlideShow.filters.blendTrans.Apply();
}
document.images.SlideShow.src = preLoad[j].src;
if (document.all) {
document.images.SlideShow.filters.blendTrans.Play();
}
j = j + 1;
if (j > (p - 1)) j = 0;
t = setTimeout('runSlideShow()', slideShowSpeed);
}
// End -->
</script>
有没有办法修改此代码以关闭所有过渡效果,并使其在单击/再次启动时停止播放?否则,参考一些不同的代码会很有帮助。
谢谢大家!
杰克
I have a client who has made a 'Visual Diary' of photographs that he took once a day for 365 days, for his portfolio site. He wants me to put these together into a time-lapse effect piece. I thought about using Flash but in the end opted for JavaScript.
What needs to happen is this: The images cycle really really quickly with no transitions or anything, just image-image-image etc. About 30/fps or something like that. When you click the flashing images, it stops on the image you have selected, so the user can take a look. When you click again, the slideshow starts playing again.
My problem is I'm a PHP/XHTML/CSS bloke who hasn't really the foggiest about JavaScript. I can happily integrate it into any page, but it's just coding the JavaScript that's troubling me.
On his homepage, I have this code used to display a basic slideshow - with transition effects etc. It's in the HTML but you can fathom out the code I'm sure:
<!-- Code for slideshow -->
<!-- Found on http://www.webdeveloper.com/forum/showthread.php?t=81441 -->
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
// Set slideShowSpeed (milliseconds)
var slideShowSpeed = 3000;
// Duration of crossfade (seconds)
var crossFadeDuration = 3;
// Specify the image files
var Pic = new Array();
// to add more images, just continue
// the pattern, adding to the array below
Pic[0] = '1.jpg'
Pic[1] = '2.jpg'
Pic[2] = '3.jpg'
Pic[3] = '4.jpg'
Pic[4] = '5.jpg'
Pic[5] = '6.jpg'
Pic[6] = '7.jpg'
Pic[7] = '8.jpg'
Pic[8] = '9.jpg'
Pic[9] = '10.jpg'
Pic[10] = '11.jpg'
Pic[11] = '12.jpg'
Pic[12] = '13.jpg'
Pic[13] = '14.jpg'
Pic[14] = '15.jpg'
Pic[15] = '16.jpg'
Pic[16] = '17.jpg'
Pic[17] = '18.jpg'
Pic[18] = '19.jpg'
Pic[19] = '20.jpg'
// do not edit anything below this line
var t;
var j = 0;
var p = Pic.length;
var preLoad = new Array();
for (i = 0; i < p; i++) {
preLoad[i] = new Image();
preLoad[i].src = Pic[i];
}
function runSlideShow() {
if (document.all) {
document.images.SlideShow.style.filter="blendTrans(duration=2)";
document.images.SlideShow.style.filter="blendTrans(duration=crossFadeDuration)";
document.images.SlideShow.filters.blendTrans.Apply();
}
document.images.SlideShow.src = preLoad[j].src;
if (document.all) {
document.images.SlideShow.filters.blendTrans.Play();
}
j = j + 1;
if (j > (p - 1)) j = 0;
t = setTimeout('runSlideShow()', slideShowSpeed);
}
// End -->
</script>
Is there any way to modify this code to turn off all transitional effects, and make it stop playing when you click it/start it again? Otherwise, a reference to some different code would be helpful.
Thank you everybody!
Jack
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评论(1)
您似乎正在使用 IE 特定的代码。我建议使用专用 JavaScript 库中的各种效果模块,例如 MooTools (我个人最喜欢的)、jQuery,或 原型 + script.aculo.us。
要停止幻灯片放映,您应该能够简单地清除超时
t
:此外,您不应该引用
setTimeout
的第一个参数。向其传递函数引用:You seem to be using IE-specific code. I would recommend using the various effects modules in a dedicated JavaScript library such as MooTools (my personal favourite), jQuery, or Prototype + script.aculo.us.
To stop the slideshow, you should be able to simply clear timeout
t
:Also, you shouldn't quote the first parameter of
setTimeout
. Pass it a function reference: