QLineEdit *double_clicked_line_edit = new QLineEdit;
double_clicked_line_edit->setPlaceholderText(tr(“请输入搜索内容”));
效果如下图所示:
QLineEdit *double_clicked_line_edit = new QLineEdit;
double_clicked_line_edit->setPlaceholderText(tr(“请输入搜索内容”));
效果如下图所示: