我在我的 Rails 应用程序中使用了 Blueimp jQuery File Upload 。当用户选择文件时，我想在将文件上传到服务器之前显示图像的缩略图和图像的名称。
我一直在参考演示来自定义这个插件。我可以在屏幕上打印文件的名称，但无法显示缩略图。
这是生成的html
<!DOCTYPE html>
<html>
<head>
<title>Fileupload</title>
<link href="/assets/application.css?body=1" media="all" rel="stylesheet" type="text/css" />
<link href="/assets/jquery.fileupload-ui.css?body=1" media="all" rel="stylesheet" type="text/css" />
<script src="/assets/jquery.js?body=1" type="text/javascript"></script>
<script src="/assets/jquery_ujs.js?body=1" type="text/javascript"></script>
<script src="/assets/jquery.ui.widget.js?body=1" type="text/javascript"></script>
<script src="/assets/application.js?body=1" type="text/javascript"></script>
<script src="/assets/jquery.tmpl.js?body=1" type="text/javascript"></script>
<script src="/assets/load-image.min.js?body=1" type="text/javascript"></script>
<script src="/assets/canvas-to-blob.min.js?body=1" type="text/javascript"></script>
<script src="/assets/jquery.fileupload.js?body=1" type="text/javascript"></script>
<script src="/assets/jquery.fileupload-fp.js?body=1" type="text/javascript"></script>
<script src="/assets/jquery.fileupload-ui.js?body=1" type="text/javascript"></script>
<meta content="authenticity_token" name="csrf-param" />
<meta content="Akp8GLPQ+DlFYI1g3CUA71hk0vg3G84aVwcVRHTlRUY=" name="csrf-token" />
</head>
<body>
<div class="files">
<form action="/users" class="upload" id="fileupload" method="post">
<input id="user_photo" name="user[photo]" type="file" />
<div>Upload files</div>
</form>
<table class="upload_files"></table>
</div>
<!-- The template to display files available for upload -->
<script id="template-upload" type="text/x-jquery-tmpl">
<tr class="template-upload fade">
<td class="preview"><span class="fade"></span></td>
<td class="name"><span>${name}</span></td>
</tr>
</script>
<script type="text/javascript" charset="utf-8">
$(function () {
$('#fileupload').fileupload({
add: function (e, data) {
console.log('add');
$.each(data.files, function (index, file) {
console.log('Added file: ' + file.name);
//alert($('#tmpl-demo').tmpl(data));
$('#template-upload').tmpl(data.files).appendTo('.upload_files');
});
var jqXHR = data.submit()
.success(function (result, textStatus, jqXHR) {/* ... */})
.error(function (jqXHR, textStatus, errorThrown) {/* ... */})
.complete(function (result, textStatus, jqXHR) {
console.log("complete");
//$('.upload_files').append('<tr><td>'+ result +'</td></tr>');
});
},
progress: function (e, data) {
console.log('progress');
},
start: function (e) {
console.log('start');
},
done: function (e) {
console.log('done');
}
}).bind('fileuploadadd', function (e, data) {
console.log('fileuploadadd');
}).bind('fileuploadprogress', function (e, data) {
console.log('fileuploadprogress');
}).bind('fileuploadstart', function (e) {
console.log('fileuploadstart');
}).bind('fileuploaddone', function (e) {
console.log('fileuploaddone');
});
});
</script>
</body>
</html>
我比较选择文件后生成的html。唯一的区别是演示应用程序具有我的应用程序中缺少的<canvas height="72" width="80"></canvas>元素。<td class="preview"><span class="fade"></span></td>
它看起来像一些配置问题。有人可以帮我正确配置它以在用户从磁盘中选择图像后立即显示缩略图吗？