snow_man_0:可以自己写一个CopyFileEx函数，不用别人的
(2021-08-23 07:59) 
bool copyFileA(QString &srcPath, QString &dstPath)
{
QFile file(srcPath);
qWarning()<<"file size="<<file.size();
QByteArray s = srcPath.toLatin1();
char *src = (char*)s.data();
QByteArray d = dstPath.toLatin1();
char *dst = (char*)d.data();
ifstream in(src, ios::binary);
ofstream ou(dst, ios::binary);
if(!in.is_open())
{
qWarning()<<"src is open failed!";
emit sigCopyValue(m_nCopyValue);
return false;
}
if(dst == src)
{
qWarning()<<"the src file can't be same with dst file";
emit sigCopyValue(m_nCopyValue);
return false;
}
char buffer[64*1024] = {0};
long long totalBytes = 0;
qWarning()<<"hello...";
//m_mutex2.lock();
while(in)
{
in.read(buffer, 64*1024);
ou.write(buffer, in.gcount());
totalBytes += in.gcount();
m_nCopyValue = (int)((totalBytes*1.0/file.size())*100);
qWarning()<<"copyValue="<<m_nCopyValue;
QElapsedTimer et;
et.start();
while(et.elapsed() < 25)
{
emit sigCopyValue(m_nCopyValue);
QCoreApplication::processEvents();
}
if(totalBytes == file.size())
break;
}
//m_mutex2.unlock();
in.close();
ou.close();
qWarning()<<"fstream close";
return true;
}
我自己也写了一个类似CopyFileEx的函数，但是在同时启动两个线程去拷贝两个大于1GB的文件时，它直接进入那个循环，然后就不停的发信号，可能是发信号太快了，主线程没有来的及回复，导致了主界面还是会卡顿、假死，请问以上的代码，可以做哪些优化或修改吗？
