为 jQueryAJAX 调用实现一个加载指示器

我有一个自举模态是从一个链接启动。在大约3秒钟的时间里，它一直处于空白状态，而 AJAX 查询则从数据库中获取数据。如何实现某种类型的加载指示器？Bootstrap 是否默认提供此功能？

编辑: 模态的 JS 代码

<script type="text/javascript">
$('#myModal').modal('hide');
$('div.divBox a').click(function(){
var vendor = $(this).text();
$('#myModal').off('show');
$('#myModal').on('show', function(){
$.ajax({
type: "GET",
url: "ip.php",
data: "id=" + vendor,
success: function(html){
$("#modal-body").html(html);
$(".modal-header h3").html(vendor);
$('.countstable1').dataTable({
"sDom": "T<'row-fluid'<'span6'l><'span6'f>r>t<'row-fluid'<'span6'i><'span6'p>>",
"sPaginationType": "bootstrap",
"oLanguage": {
"sLengthMenu": "_MENU_ records per page"
},
"aaSorting":[[0, "desc"]],
"iDisplayLength": 10,
"oTableTools": {
"sSwfPath": "swf/copy_csv_xls_pdf.swf",
"aButtons": ["csv", "pdf"]
}
});
}
});
});
});
$('#myModal').on('hide', function () {
$("#modal-body").empty();
});
</script>
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最佳答案

I'm guessing you're using jQuery.get or some other jQuery ajax function to load the modal. You can show the indicator before the ajax call, and hide it when the ajax completes. Something like

$('#indicator').show();
$('#someModal').get(anUrl, someData, function() { $('#indicator').hide(); });
小开

A loading indicator is simply an animated image (.gif) that is displayed until the completed event is called on the AJAX request. http://ajaxload.info/ offers many options for generating loading images that you can overlay on your modals. To my knowledge, Bootstrap does not provide the functionality built-in.

小开

I solved the same problem following this example:

This example uses the jQuery JavaScript library.

First, create an Ajax icon using the AjaxLoad site.
Then add the following to your HTML : 

<img src="/images/loading.gif" id="loading-indicator" style="display:none" />

And the following to your CSS file: 

#loading-indicator {
position: absolute;
left: 10px;
top: 10px;
}

Lastly, you need to hook into the Ajax events that jQuery provides; one event handler for when the Ajax request begins, and one for when it ends:

$(document).ajaxSend(function(event, request, settings) {
$('#loading-indicator').show();
});


$(document).ajaxComplete(function(event, request, settings) {
$('#loading-indicator').hide();
});

This solution is from the following link. How to display an animated icon during Ajax request processing

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There is a global configuration using jQuery. This code runs on every global ajax request.

<div id='ajax_loader' style="position: fixed; left: 50%; top: 50%; display: none;">
<img src="themes/img/ajax-loader.gif"></img>
</div>


<script type="text/javascript">
jQuery(function ($){
$(document).ajaxStop(function(){
$("#ajax_loader").hide();
});
$(document).ajaxStart(function(){
$("#ajax_loader").show();
});
});
</script>

Here is a demo: http://jsfiddle.net/sd01fdcm/

小开

This is how I got it working with loading remote content that needs to be refreshed:

$(document).ready(function () {
var loadingContent = '<div class="modal-header"><h1>Processing...</h1></div><div class="modal-body"><div class="progress progress-striped active"><div class="bar" style="width: 100%;"></div></div></div>';


// This is need so the content gets replaced correctly.
$("#myModal").on("show.bs.modal", function (e) {
$(this).find(".modal-content").html(loadingContent);
var link = $(e.relatedTarget);
$(this).find(".modal-content").load(link.attr("href"));
});


$("#myModal2").on("hide.bs.modal", function (e) {
$(this).removeData('bs.modal');
});
});

Basically, just replace the modal content while it's loading with a loading message. The content will then be replaced once it's finished loading.

小开

This is how I realised the loading indicator by an Glyphicon:

<!DOCTYPE html>
<html>


<head>
<title>Demo</title>


<link rel="stylesheet" href="https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.6/css/bootstrap.min.css">
<script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.12.4.min.js"></script>
<script src="https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.6/bootstrap.min.js"></script>


<style>
.gly-ani {
animation: ani 2s infinite linear;
}
@keyframes ani {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(359deg);
}
}
</style>
</head>


<body>
<div class="container">


<span class="glyphicon glyphicon-refresh gly-ani" style="font-size:40px;"></span>


</div>
</body>


</html>

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