文件复制操作不能在单独的线程中进行吗?
我正在尝试在其他线程中运行复制文件的代码,这样它就不会冻结应用程序的 GUI。
我发现它似乎无法在单独的线程中工作。
为什么它不工作?
void CopyOperation::run()
{
CopyFilesToFolder(list,sFolder);
}
bool CopyOperation::CopyFilesToFolder(const QStringList &oFileList,const QString
&sTargetFolder)
{
if(sTargetFolder.isEmpty())
{
status = false;
return false;
}
QDir dir(sTargetFolder);
if(!dir.exists()) dir.mkdir(sTargetFolder);
QString sOldDirPath = dir.currentPath();
//if(!dir.setCurrent(sTargetFolder)) return false;
QFile file;
status = true;
foreach(QString sFileName,oFileList)
{
file.setFileName(sFileName);
QFileInfo info(sFileName);
QString newfile = sTargetFolder + "/" + info.fileName();
qDebug() << "\n name = " << newfile;
if(!QFile::copy(sFileName,newfile))
//if(!file.copy(newfile))
{
qDebug() << "\n File copy failed .. " + file.fileName() + " Error : " + file.errorString();
status = false;
break;
}
}
qDebug() << "\n Result .. " << file.errorString() << "code " << file.error();
//dir.setCurrent(sOldDirPath);
return status;
}
I am trying to run code of copying files in other thread so that it may not freeze the GUI of the application.
I found that it does not seem to work in a separate thread.
Why is it not working ?
void CopyOperation::run()
{
CopyFilesToFolder(list,sFolder);
}
bool CopyOperation::CopyFilesToFolder(const QStringList &oFileList,const QString
&sTargetFolder)
{
if(sTargetFolder.isEmpty())
{
status = false;
return false;
}
QDir dir(sTargetFolder);
if(!dir.exists()) dir.mkdir(sTargetFolder);
QString sOldDirPath = dir.currentPath();
//if(!dir.setCurrent(sTargetFolder)) return false;
QFile file;
status = true;
foreach(QString sFileName,oFileList)
{
file.setFileName(sFileName);
QFileInfo info(sFileName);
QString newfile = sTargetFolder + "/" + info.fileName();
qDebug() << "\n name = " << newfile;
if(!QFile::copy(sFileName,newfile))
//if(!file.copy(newfile))
{
qDebug() << "\n File copy failed .. " + file.fileName() + " Error : " + file.errorString();
status = false;
break;
}
}
qDebug() << "\n Result .. " << file.errorString() << "code " << file.error();
//dir.setCurrent(sOldDirPath);
return status;
}
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由于您没有发布代码,我只能尝试猜测问题是什么。 Qt 有一个静态函数:
还有一个不是静态的副本:
如果
newName
定义的文件已经存在,则它们都会失败,即。现有文件不会被覆盖。另外,也许路径不存在。如果没有代码的某些部分,很难猜测问题是什么。Since you didn't post code, I just can try to guess what is the problem. Qt has a static function:
There is also a copy which is not static:
Both of them will fail if file defined by
newName
already exists, ie. existing file will not be overwritten. Also, maybe path doesn't exists. Without some portion of code is difficult to guess what is the problem.