QFileDialog dlg(this);    dlg.setWindowTitle(tr("打开图片"));    dlg.setWindowIcon(QIcon(":/main/res/图片.png"));    dlg.setNameFilter(tr("ALL Image Type files(*.png *.jpg *.bmp *.jpeg *.gif *.psd)"));    QString fileName;    if(dlg.exec()==QFileDialog::Accepted)    {        fileName = dlg.selectedFiles()[0];    }    if(fileName.length() <1 ) return ;    //...后续操作