Pointer type conversion

canid

Hello, what is the base class of the UI class?I want to take the UI base class pointer as a function parameter and use qobject_cast to convert the base class pointer inside the function into a subclass pointer, but the following error is indicated: 0_1565088744928_捕获.JPG

mrjj

Hi
Its a plain class. Its not QObject based so u cant use qobject_cast

class Ui_MainWindow
{
public:
    QWidget *centralWidget;
    QHBoxLayout *horizontalLayout;
    QTabWidget *tabWidget;
    QWidget *tab;

canid

@mrjj
static_cast,dynamic_cast,reinterpret_cast are all wrong with it. Is there any other way?

mrjj

Hi
Since its just a plain type.
Im not sure what you are trying to do . There is nothing to cast it to.
Its not even a QWidget.
So what are you trying to do ?
Its very rarely needed to send that private class to anyone. Its internal detail.

fcarney

@canid
Show some minimal code. Its very hard to reason about code we cannot see.