所以我的目标是制作一个图像幻灯片，底部有 3 个可点击的热点。我现在有了它的基本功能，但是我的内容 div 在它第一次循环遍历图像之前无法正确调整自己的大小。我需要在页面加载时立即正确调整所有内容的大小和位置。
<script type="text/javascript" src="js/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#image").attr("src", images[0]);
});
//Click tracking
var badClicks = 0;
var skipClicks = 0;
var goodClicks = 0;
//Counter to keep track of images
var iCount = 0;
var images = [];
images[0] = "images/document.png";
images[1] = "images/document2.png";
images[2] = "images/document3.png";
function nextImage(){
iCount++;
//If there are no more images in the array, go back to the first image
if (images[iCount]==null) {
iCount = 0;
};
//Change image source to new image
$("#image").attr("src", images[iCount]);
//Set content wrapper width & height to current image's width & height
$("#content").css("width", $("#image").css("width"));
$("#content").css("height", $("#image").css("height"));
//Store content wrapper's new width and height into variables
var h = parseInt($("#content").css("height"));
var w = parseInt($("#content").css("width"));
//Move hotspot-wrapper to the bottom of the new image
//Height of content wrapper - height of hotspot wrapper = new top
$("#hotspot-wrapper").css("top", h - parseInt($("#hotspot-wrapper").css("height")));
console.log(images[iCount] + " h " + h + " w " + w);
}
//Do something with data for "bad" hotspot
function bad(){
badClicks++;
}
//Do something with data for "skip" hotspot
function skip(){
skipClicks++;
nextImage();
}
//Do something with data for "good" hotspot
function good(){
goodClicks++;
}
//Show the collected data
function displayResults(){
$("#results").append("<br />Bad: " + badClicks
+ " Skip: " + skipClicks
+ " Good: " + goodClicks);
}
</script>
</head>
<body>
<div id="content">
<img id="image" />
<div id="hotspot-wrapper">
<div id="hotspot-a" class="hotspot" onclick="bad();"></div>
<div id="hotspot-b" class="hotspot" onclick="skip();"></div>
<div id="hotspot-c" class="hotspot" onclick="good();"></div>
</div>
</div>
<br />
<div id="results" style="clear:both">
<button onclick="displayResults();" style="text-align: center">Show results</button>
</div>
如有任何帮助、提示或建议，我们将不胜感激! 谢谢!
最佳答案
首先我更喜欢这种方式来初始化图像数组:
var images = [];
var image = new Image();
image.src = '/some/image/url.jpg';
/* while you doing this image already load in background - so its faster way*/
images.push(image);
您可以通过 jQuery 以这种方式显示此图像:
$('#parend_of_image_div').html(images[iCount]);
在您的 nextImage 函数中使用此代码:
var img = images[iCount];
$(img).load(function(){
var width = $(this).width()
var height = $(this).height();
/* do other stuff */
});
关于javascript - 如何让 div 调整自身大小以在页面加载时显示图像，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12806340/