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我有这个简单的例子,当我试图拨打context()->moveToThread(render_thread_);
时,这个程序崩溃。谁能帮忙?QOpenGLWidget将上下文移动到另一个线程崩溃
class FrameRenderer: public QThread
{
Q_OBJECT
public:
FrameRenderer(QGLCanvas *parent):m_parent(parent), QThread(){}
void run() Q_DECL_OVERRIDE;
QGLCanvas *m_parent;
};
class QGLCanvas : public QOpenGLWidget, protected QOpenGLFunctions
{
Q_OBJECT
public:
QGLCanvas(QWidget* parent = NULL);
~QGLCanvas();
virtual void initializeGL();
virtual void paintGL();
virtual void resizeGL(int width, int height);
void DrawThreadEntry();
FrameRenderer* render_thread_;
};
void FrameRenderer::run()
{
m_parent->DrawThreadEntry();
}
QGLCanvas::QGLCanvas(QWidget* parent)
: QOpenGLWidget(parent)
{
render_thread_ = new FrameRenderer(this);
doneCurrent();
context()->moveToThread(render_thread_);
render_thread_->start();
}
void QGLCanvas::DrawThreadEntry()
{
while(true)
{
makeCurrent();
QOpenGLFunctions f;
f.initializeOpenGLFunctions();
f.glClearColor(1.0, 1.0, 1.0, 1.0);
f.glFinish();
doneCurrent();
emit update();
}
}
Qt中的基本规则是,您只能在主线程中更新GUI,称为GUI线程。 – eyllanesc
@eyllanesc但是当我将上下文移动到线程时它崩溃了。我对发射线发表评论,它平静地坠毁。 – Johnnylin
阅读此:http://doc.qt.io/qt-5/thread-basics.html – eyllanesc