QLineEdit 编辑框左侧添加小图标

QAction *searchAction = new QAction(ui->lineEdit);

searchAction->setIcon(QIcon(":/image/user.png"));

ui->lineEdit->addAction(searchAction,QLineEdit::LeadingPosition );//编辑框左侧
//QLineEdit::TrailingPosition 在右侧

备注：不知道原理，但是亲测可行