检测jQuery UI自动完成
问题描述：
如何检测输入框当前是否是jQuery UI自动完成？似乎没有本地方法，但我希望有这样简单的东西：
How can I detect whether or not an input box is currently a jQuery UI autocomplete? There doesn't seem to be a native method for this, but I'm hoping there is something simple like this:
if ($("#q").autocomplete)
{
//Do something
}
然而，有条件的似乎总是返回true。
That conditional, however, seems to always return true.
答
if ($("#q").hasClass("ac_input")) {
// do something
}
UPDATE
JQuery UI自动完成小部件中的类名现在是'ui autocomplete-input'以便代码为：
The class name in the JQuery UI autocomplete widget is now 'ui-autocomplete-input' so that code would be:
if ($("#q").hasClass("ui-autocomplete-input")) {
// do something
}