Struts 2 jQuery插件isSubscribe无法正常工作 [英] Struts 2 jQuery plugin isSubscribe not working
问题描述
struts 2 jQuery插件有一个内置的发布 / 订阅框架。
The struts 2 jQuery plugin has a built in publish/subscribe framework.
如果您定义自己的发布和订阅事件（例如在网格上），则每次发布事件时都会调用订阅的函数。有关详细信息，请参阅（ Struts 2 jQuery Subscribe不止一次调用）
If you define your own publish and subscribe event (for example on a grid) the subscribed function will be called every time the event is published. For details please see (Struts 2 jQuery Subscribe is called more than once)
为了防止这种情况，可以使用 isSubscribed 方法。
To prevent this, there is a isSubscribed method which can be used.
对于网格：
<sjg:grid id="gridtable"
onBeforeTopics="before_grid_load" >
JS将是：
$.subscribe('before_grid_load', function(event, data) {
if ( $('#gridtable').isSubscribed('before_grid_load') ){
return ;
}
//go on with function
}
问题是 $（'＃gridtable'）。isSubscribed（'before_grid_load'）返回 false 每次！
推荐答案
在元素上应用函数 isSubscribed $（'＃gridtable'）但订阅 $（文件）。我已经测试了最后一个元素，它对我不起作用。但尝试使用第一个元素并且它有效。
The function isSubscribed is applied on the element $('#gridtable') but subscribed to the $(document). I have tested with the last element and it didn't work to me. But tried with the first element and it worked.
脚本：
<head>
<link href="<s:url value="/css/template_styles.css"/>" type="text/css" rel="stylesheet">
<sj:head />
<title>jQuery Grid</title>
<script type="text/javascript">
$(document).ready(function(){
console.log("Before subscribe");
$("#gridtable").subscribe("beforeTopic", function(topic, data) {
console.log('Topic: '+data, topic);
if ( $("#gridtable").isSubscribed("beforeTopic") ){
console.log('Subscribed: '+data, topic);
return;
}
//go on with function
console.log('Not subscribed: '+data, topic);
});
console.log("After subscribe");
});
</script>
</head>
对于网格：
<sjg:grid id="gridtable"
onBeforeTopics="beforeTopic" >
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