qt - Get file size during generate in QT

Question

I need get the File size while it is being generated.

I've tried using QThread and QFileInfo::size and a while with a flag that signals when the finished file, but the value never changes.

So was wondering if you can take the file size while it is being generated.

Answer 1

来自Qt 文档：

注意：为了提高性能，QFileInfo 缓存有关文件的信息。因为文件可以被其他用户或程序更改，甚至可以被同一程序的其他部分更改，所以有一个刷新文件信息的函数：refresh()。如果您想关闭 QFileInfo 的缓存并在每次向它请求信息时强制它访问文件系统，请调用 setCaching(false)。

QFileInfo::refresh()因此，在（重新）检查文件大小之前尝试该功能。