Qt出现假死冻结现象的原因及解决方法

void showEvent(QShowEvent *e)
{
    setAttribute(Qt::WA_Mapped);
    QWidget::showEvent(e);
}

#include <QApplication>
#include <QWidget>
#include <QPushButton>
#include <QThread>
#include <QDebug>
// 模拟一个长时间运行的任务的工作线程
class WorkerThread : public QThread
{
    Q_OBJECT
signals:
    void workFinished();
protected:
    void run() override {
        // 模拟一个长时间运行的任务（可替换为实际任务）
        for (int i = 0; i < 100000000; ++i) {
            // 执行一些工作...
        }
        emit workFinished();
    }
};
class MyWidget : public QWidget
{
    Q_OBJECT
public:
    MyWidget() {
        QPushButton* button = new QPushButton("Start Long Task", this);
        connect(button, &QPushButton::clicked, this, &MyWidget::startLongTask);
        // 创建工作线程
        workerThread = new WorkerThread();
        connect(workerThread, &WorkerThread::workFinished, this, &MyWidget::onWorkFinished);
    }
private slots:
    void startLongTask() {
        // 启动工作线程
        workerThread->start();
        qDebug() << "Long task started...";
    }
    void onWorkFinished() {
        qDebug() << "Long task finished!";
    }
private:
    WorkerThread* workerThread;
};
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MyWidget widget;
    widget.show();
    return app.exec();
}
#include "main.moc"