QFileDialog打开另一个(可能是父)不需要的窗口

此问题可能是由于未正确定义父窗口小部件.在QT手册或在线示例中，传递给QFileDialog :: getOpenFileName(或类似函数)的第一个参数通常为"this".就我而言，如果我用"this"调用以下函数，它将打开对话框和另一个不包含任何内容且标题与可执行文件名称相同的窗口.我试图摆脱第二个不需要的窗口，但没有成功.我用"gui :: parentWidget()"或"0"替换了"this"，仍然是同样的问题.另外，如果我没记错的话，在将QT更新到5.0.2版之前，我没有这个问题.任何帮助将不胜感激.

Probably this issue is due to not defining parent widget properly. In QT manual or examples available online, first argument passed to QFileDialog::getOpenFileName (or similar functions) is generally "this". In my case, if I call following function with "this", it will open the dialog box and another window that doesn't contain anything and has a title which is the same as the name of executable file. I tried to get rid of the second unwanted window with no success. I replaced "this" with "gui::parentWidget()" or "0", still same issue. Also if I remember correctly I didn't have this issue before updating QT to version 5.0.2. Any help would be appreciated.

void gui::on_coordinatesBrowse_clicked()
{
     QString fileName = QFileDialog::getOpenFileName(this,"Open File");
//.....
}

我有:

gui::gui(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::gui)
{
    ui->setupUi(this);
//.....
}

和

int main(int argc, char *argv[]) 
{
    QApplication a(argc, argv);
    gui mainW;
    mainW.show();
    return a.exec();
}