Novice QT problem for help-CodePudding

Why would an error here, is there any who teach the

CodePudding user response:

What is MainWindow, QMainWindow

CodePudding user response:

Parameter type, take a look at your huanying if this class inherits QMainWindow

CodePudding user response:

Appeared in front of the problem is solved, and then can't exec mainwindow calls inside, that should use what ah, QDialog can use the exec

CodePudding user response:

Mainwindow. The show ();

CodePudding user response:

reference weixin_44353608 reply: 3/f

in front of the problem is solved, and then can't appeared the exec mainwindow calls inside, that should use what ah, QDialog can use the exec

MainWindow * MainWindow=new MainWindow.
Mainwindow - & gt; show();

Increase in the MainWindow constructor: setAttribute (Qt: : WA_DeleteOnClose);

CodePudding user response:

reference 5 floor of Yi reply:

Quote: refer to the third floor weixin_44353608 response:

Appeared in front of the problem is solved, and then can't exec mainwindow calls inside, that should use what ah, QDialog can use the exec

MainWindow * MainWindow=new MainWindow.
Mainwindow - & gt; show();
Increase in the MainWindow constructor: setAttribute (Qt: : WA_DeleteOnClose);

my third window is opened, but has been covered by the window