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阻塞源码赏析

这是最近一次项目遇到的问题，原因是我觉得子线程里俩次请求间隔太短了，会引起服务器屏蔽我的api因此，我故作聪明加多了一个延时函数，欢迎各位鉴赏代码。

// 并行发起双请求
QNetworkRequest liveRequest(liveUrl);
liveRequest.setSslConfiguration(sslConfig);
QNetworkReply *liveReply = m_manager->get(liveRequest);QThread::msleep(10000);  QNetworkRequest forecastRequest(forecastUrl);
forecastRequest.setSslConfiguration(sslConfig);
QNetworkReply *forecastReply = m_manager->get(forecastRequest);// 处理实时响应
connect(liveReply, &QNetworkReply::finished, [this, liveReply]() {if (liveReply->error() == QNetworkReply::NoError) {QJsonDocument doc = QJsonDocument::fromJson(liveReply->readAll());parseLiveData(doc.object());}liveReply->deleteLater();
});// 处理预报响应
connect(forecastReply, &QNetworkReply::finished, [this, forecastReply]() {if (forecastReply->error() == QNetworkReply::NoError) {QJsonDocument doc = QJsonDocument::fromJson(forecastReply->readAll());parseForecastData(doc.object());}forecastReply->deleteLater();
});

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下面这个版本才是不会引起主线程阻塞的版本，各位可以分析是什么原因导致了主线程阻塞。

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// 串行发起双请求
QNetworkRequest liveRequest(liveUrl);
liveRequest.setSslConfiguration(sslConfig);
QNetworkReply *liveReply = m_manager->get(liveRequest);// 处理实时响应
connect(liveReply, &QNetworkReply::finished, [this, liveReply]() {if (liveReply->error() == QNetworkReply::NoError) {QJsonDocument doc = QJsonDocument::fromJson(liveReply->readAll());parseLiveData(doc.object());QThread::msleep(1000);}liveReply->deleteLater();
});QNetworkRequest forecastRequest(forecastUrl);
forecastRequest.setSslConfiguration(sslConfig);
QNetworkReply *forecastReply = m_manager->get(forecastRequest);// 处理预报响应
connect(forecastReply, &QNetworkReply::finished, [this, forecastReply]() {if (forecastReply->error() == QNetworkReply::NoError) {QJsonDocument doc = QJsonDocument::fromJson(forecastReply->readAll());parseForecastData(doc.object());}forecastReply->deleteLater();
});