擅长:python、mysql、java
<p>由于qtv5.9.4可以设置环境变量<code>QT_FILESYSTEMMODEL_WATCH_FILES</code>,因此可以在<a href="http://code.qt.io/cgit/qt/qtbase.git/tree/dist/changes-5.9.4/?h=v5.9.4" rel="nofollow noreferrer">changelog</a>中阅读更多关于它的信息:</p>
<blockquote>
<p>[QTBUG-46684] It is now possible to enable per-file watching by
setting the environment variable QT_FILESYSTEMMODEL_WATCH_FILES,
allowing to track for example changes in file size.</p>
</blockquote>
<p>有几件事:</p>
<ul>
<li>目前您需要设置它<a href="http://code.qt.io/cgit/qt/qtbase.git/tree/src/widgets/dialogs/qfileinfogatherer.cpp?h=dev#n270" rel="nofollow noreferrer">before initializing the model</a>,之后您可以毫无问题地将其设置到另一个文件夹。在</li>
<li>不过,请注意,这个特性是以潜在的重载为代价的。在</li>
</ul>