问题描述
我无法用属性 modal = true 实现一个（primfaces）对话框它与modal = false正确地工作，但是当我尝试设置 modal = true 时，即使对话框覆盖也会失效。
I am unable to achieve a (primefaces)dialog box with attribute modal=true. It works correctly with modal=false, but when I try to set modal=true, even the dialog box overlay becomes inactive.
如何使其正常工作？
推荐答案
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Per the Primefaces Guide 2.2 on the Dialog section:
$ b b
当使用Primefaces对话框时，使用appendToBody属性来启用对话框覆盖。
When using the Primefaces dialog utilize the appendToBody attribute to enable the dialog overlay to be found. The Primefaces dialog is based on the YUI dialog component which has a similar issue for modal dialog overlays.
操作对话框覆盖将涉及重写覆盖的CSS类并指定你自己的不透明度。
Manipulating the dialog overlay will involve overriding the CSS class of the overlay and specifying your own opacity.
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