Question

从这里开始：http://doc.qt.io/qt-4.8/qt-widgets-windowflags-example.html

 if (flags & Qt::MSWindowsFixedSizeDialogHint)
     text += "\n| Qt::MSWindowsFixedSizeDialogHint";
 if (flags & Qt::X11BypassWindowManagerHint)
     text += "\n| Qt::X11BypassWindowManagerHint";
 if (flags & Qt::FramelessWindowHint)
     text += "\n| Qt::FramelessWindowHint";
 if (flags & Qt::WindowTitleHint)
     text += "\n| Qt::WindowTitleHint";
 if (flags & Qt::WindowSystemMenuHint)
     text += "\n| Qt::WindowSystemMenuHint";
 if (flags & Qt::WindowMinimizeButtonHint)
     text += "\n| Qt::WindowMinimizeButtonHint";
 if (flags & Qt::WindowMaximizeButtonHint)
     text += "\n| Qt::WindowMaximizeButtonHint";
 if (flags & Qt::WindowCloseButtonHint)
     text += "\n| Qt::WindowCloseButtonHint";
 if (flags & Qt::WindowContextHelpButtonHint)
     text += "\n| Qt::WindowContextHelpButtonHint";
 if (flags & Qt::WindowShadeButtonHint)
     text += "\n| Qt::WindowShadeButtonHint";
 if (flags & Qt::WindowStaysOnTopHint)
     text += "\n| Qt::WindowStaysOnTopHint";
 if (flags & Qt::CustomizeWindowHint)
     text += "\n| Qt::CustomizeWindowHint";

但是当我这样做时：

Qt :: WindowFlags flags = 0;

flags = flags | Qt :: WindowStaysOnTopHint;
flags = flags & Qt :: WindowMinimizeButtonHint;
window->setWindowFlags (flags);

第一个标志被覆盖。有什么方法可以同时设置多个标志？

Answer 1

window->setWindowFlags (Qt::WindowStaysOnTopHint | Qt::WindowMinimizeButtonHint );

供您参考：

Window Flags作为 OR组合存储在QFlags<WindowType>类型的对象中，其中WindowType是枚举。

存储标志时，使用按位 OR运算符组合它们的值。

有关详细信息，请参阅Qt documentation。

Answer 2

尝试：

Qt :: WindowFlags flags = 0;

flags = flags | Qt :: WindowStaysOnTopHint;
flags = flags | Qt :: WindowMinimizeButtonHint;
window->setWindowFlags (flags);

如何在QMainWindow中设置多个标志？

2 个答案: