我正在学习如何上传多张图片并显示它们的预览...
我遇到了以下代码
<html>
<head>
<style>
.input-file-row-1:after {
content: ".";
display: block;
clear: both;
visibility: hidden;
line-height: 0;
height: 0;
}
.input-file-row-1{
display: inline-block;
margin-top: 25px;
position: relative;
}
#preview_image {
display: none;
width: 90px;
height: 90px;
margin: 2px 0px 0px 5px;
border-radius: 10px;
}
.upload-file-container {
position: relative;
width: 100px;
height: 137px;
overflow: hidden;
background: url('images/picplus.png') top center no-repeat;
float: left;
margin-left: 23px;
}
.upload-file-container-text{
font-family: Arial, sans-serif;
font-size: 12px;
color: #719d2b;
line-height: 17px;
text-align: center;
display: block;
position: absolute;
left: 0;
bottom: 0;
width: 100px;
height: 35px;
}
.upload-file-container-text > span{
border-bottom: 1px solid #719d2b;
cursor: pointer;
}
.one_opacity_0 {
opacity: 0;
height: 0;
width: 1px;
float: left;
}
</style>
<script>
function readURL(input,target)
{
if(input.files && input.files[0])
{
var reader=new FileReader();
var image_target=$(target);
reader.onload=function(e)
{
image_target.attr('src',e.target.result).show();
};
reader.readAsDataUrl(input.files[0]);
}
}
$("patient_pic").live("change",function(){
readURL(this,"#preview_image")
});
</script>
</head>
<body>
<form name="" method="post" action="#" class="feedback-form-1">
<fieldset>
<div class="input-file-row-1">
<div class="upload-file-container">
<img id="preview_image" src="#" alt="" />
<div class="upload-file-container-text">
<div class = 'one_opacity_0'>
<input type="file" id="patient_pic" label = "add" />
</div>
<span> Add Photo </span>
</div>
<div class="upload-file-container-text">
<div class = 'one_opacity_0'>
<input type="file" id="patient_pic" label = "add" />
</div>
<span> Add Photo </span>
</div>
</div>
</div>
</fieldset>
</form>
</body>
</html>
我遇到了这个 JS Fiddle这对我来说是完美的解释。但作为初学者，我知道它包含一个 jQuery 库，它清楚地显示在 Fiddle 的框架扩展中。现在我的问题是，当我在我的机器上开始编码时，我应该如何包含它？
head ( <script src="???">) 部分将包含什么以调用库？
最佳答案
下面是预览多个上传图像的解决方案的工作示例。 ( Source , Fiddle )
window.onload = function() {
//Check File API support
if (window.File && window.FileList && window.FileReader) {
var filesInput = document.getElementById("files");
filesInput.addEventListener("change", function(event) {
var files = event.target.files; //FileList object
var output = document.getElementById("result");
for (var i = 0; i < files.length; i++) {
var file = files[i];
//Only pics
if (!file.type.match('image'))
continue;
var picReader = new FileReader();
picReader.addEventListener("load", function(event) {
var picFile = event.target;
var div = document.createElement("div");
div.innerHTML = "<img class='thumbnail' src='" + picFile.result + "'" +
"title='" + picFile.name + "'/>";
output.insertBefore(div, null);
});
//Read the image
picReader.readAsDataURL(file);
}
});
} else {
console.log("Your browser does not support File API");
}
}body {
font-family: ‘Segoe UI’;
font-size: 12pt;
}
header h1 {
font-size: 12pt;
color: #fff;
background-color: #1BA1E2;
padding: 20px;
}
article {
width: 80%;
margin: auto;
margin-top: 10px;
}
.thumbnail {
height: 100px;
margin: 10px;
}<form id='post-form' class='post-form' method='post'>
<label for='files'>Select multiple files: </label>
<input id='files' type='file' multiple/>
<output id='result' />
</form>关于javascript - 多张图片上传和预览，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20779983/