1.QAction
void addAction(QAction * action, ActionPosition position) QLineEdit::LeadingPosition//前面 QLineEdit::TrailingPosition//后面
2.自定义
QMargins margins=ui->lineEdit_3->textMargins(); tipLbl=new QLabel("密码正确",this); ui->lineEdit_3->setTextMargins(margins.left(),margins.top(),tipLbl->width(),margins.bottom());//避免与文字重叠,需调整。 QHBoxLayout *layOut=new QHBoxLayout; layOut->addStretch(); layOut->addWidget(tipLbl); layOut->setSpacing(0); layOut->setContentsMargins(0,0,0,0); ui->lineEdit_3->setLayout(layOut);
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