我的函数使用QNetworkAccessManager并发下载多个文件,然后应该等待所有QNetworkReply回复完成后才能继续执行剩余的代码。
然而,我无法使QEventLoop与多个连接一起工作,它要么在所有回复完成之前返回,要么就会陷入我认为是无限循环的状态。
这是我的代码:
void DownloadFiles(QStringList urls)
{
QNetworkAccessManager *manager = new QNetworkAccessManager(this);
QEventLoop loop;
QNetworkReply *replies[6];
for (int i = 0, i < urls.lenght(); i++){
replies[i] = manager->get(QNetworkRequest(QUrl(urls[i]));
connect(replies[i], SIGNAL(finished()), &loop, SLOT(quit()));
}
loop.exec(); // Wait here
// Rest of code
}
也许更加荒谬的尝试:
void DownloadFiles(QStringList urls)
{
QNetworkAccessManager *manager = new QNetworkAccessManager(this);
QEventLoop loops[6];
QNetworkReply *replies[6];
for (int i = 0, i < urls.lenght(); i++){
replies[i] = manager->get(QNetworkRequest(QUrl(urls[i]));
connect(replies[i], SIGNAL(finished()), &loops[i], SLOT(quit()));
}
for (int i = 0; i < 6; i++)
loops[i]->exec(); // Wait here
// Rest of code
}
我的目标是同时下载多个文件,并等待它们全部完成后再继续执行其余代码。