jQuery仅在刷新页面时工作
当我将连接到此jQuery代码(如下)的网页放入时,图像滑块将不工作,除非我先刷新页面,然后单击图像滑块上的箭头,它将浏览图像。有没有人对我需要在这段代码中修改什么以使其工作有任何见解??谢谢jQuery仅在刷新页面时工作,jquery,Jquery,当我将连接到此jQuery代码(如下)的网页放入时,图像滑块将不工作,除非我先刷新页面,然后单击图像滑块上的箭头,它将浏览图像。有没有人对我需要在这段代码中修改什么以使其工作有任何见解??谢谢 $(window).load(function(){ // We are listening to the window.load event, so we can be sure // that the images in the slideshow are loaded properly // T
$(window).load(function(){
// We are listening to the window.load event, so we can be sure
// that the images in the slideshow are loaded properly
// Testing whether the current browser supports the canvas element:
var supportCanvas = 'getContext' in document.createElement('canvas');
// The canvas manipulations of the images are CPU intensive,
// this is why we are using setTimeout to make them asynchronous
// and improve the responsiveness of the page.
var slides = $('#slideshow li'),
current = 0,
slideshow = {width:0,height:0};
setTimeout(function(){
window.console && window.console.time && console.time('Generated In');
if(supportCanvas){
$('#slideshow img').each(function(){
if(!slideshow.width){
// Taking the dimensions of the first image:
slideshow.width = this.width;
slideshow.height = this.height;
}
// Rendering the modified versions of the images:
createCanvasOverlay(this);
});
}
window.console && window.console.timeEnd && console.timeEnd('Generated In');
$('#slideshow .arrow').click(function(){
var li = slides.eq(current),
canvas = li.find('canvas'),
nextIndex = 0;
// Depending on whether this is the next or previous
// arrow, calculate the index of the next slide accordingly.
if($(this).hasClass('next')){
nextIndex = current >= slides.length-1 ? 0 : current+1;
}
else {
nextIndex = current <= 0 ? slides.length-1 : current-1;
}
var next = slides.eq(nextIndex);
if(supportCanvas){
// This browser supports canvas, fade it into view:
canvas.fadeIn(function(){
// Show the next slide below the current one:
next.show();
current = nextIndex;
// Fade the current slide out of view:
li.fadeOut(function(){
li.removeClass('slideActive');
canvas.hide();
next.addClass('slideActive');
});
});
}
else {
// This browser does not support canvas.
// Use the plain version of the slideshow.
current=nextIndex;
next.addClass('slideActive').show();
li.removeClass('slideActive').hide();
}
});
},100);
// This function takes an image and renders
// a version of it similar to the Overlay blending
// mode in Photoshop.
// **NOTE: REMOVED COLOR CHANGES
function createCanvasOverlay(image){
var canvas = document.createElement('canvas'),
canvasContext = canvas.getContext("2d");
// Make it the same size as the image
canvas.width = slideshow.width;
canvas.height = slideshow.height;
// Drawing the default version of the image on the canvas:
canvasContext.drawImage(image,0,0);
// Taking the image data and storing it in the imageData array:
var imageData = canvasContext.getImageData(0,0,canvas.width,canvas.height),
data = imageData.data;
// Putting the modified imageData back to the canvas.
canvasContext.putImageData(imageData,0,0);
// Inserting the canvas in the DOM, before the image:
image.parentNode.insertBefore(canvas,image);
}
//end of window load
});
$(窗口).load(函数(){
//我们正在侦听window.load事件,因此可以确定
//幻灯片中的图像是否已正确加载
//测试当前浏览器是否支持画布元素:
var supportCanvas='getContext'在document.createElement('canvas')中;
//图像的画布操作是CPU密集型的,
//这就是为什么我们使用setTimeout使它们异步
//并提高页面的响应能力。
var slides=$(“#slideshow li”),
电流=0,
幻灯片放映={宽度:0,高度:0};
setTimeout(函数(){
window.console&&window.console.time&&console.time('Generated In');
如果(支持画布){
$('#幻灯片显示img')。每个(函数(){
如果(!slideshow.width){
//获取第一幅图像的尺寸:
slideshow.width=this.width;
slideshow.height=this.height;
}
//渲染图像的修改版本:
createCanvasOverlay(这个);
});
}
window.console&&window.console.timeEnd&&console.timeEnd('Generated In');
$('#slideshow.arrow')。单击(函数(){
var li=滑动。等式(电流),
canvas=li.find('canvas'),
nextIndex=0;
//取决于这是下一个还是上一个
//箭头,相应地计算下一张幻灯片的索引。
if($(this).hasClass('next')){
nextIndex=当前>=幻灯片。长度-1?0:当前+1;
}
否则{
nextIndex=current我过去在$(window).load()
方面的结果不好。我的经验是,加载事件通常根本不会触发,例如,如果浏览器认为页面已缓存。这可以解释为什么硬刷新似乎可以解决您的问题
我的建议是不要依赖它,而是使用$(document.ready()
。为什么不使用$(document.ready()
?@Jan你的意思是$(document.ready()
?)或者是$(document.ready()
,或者它的较短版本$()
$)。ready(){
或者($){
做了同样的事情吗?我尝试改用$document.ready(),现在即使刷新页面也无法使滑块工作。这可能是调用图像加载的方式吗?@Shub我也遇到了同样的问题,并将$(window.load()更改为$(document.ready())对我也不起作用,刷新时根本没有加载滑块…你最终解决了这个问题吗?@starkey01这可能会解决你的问题: