设置其text属性 QLineEdit *edit = new QLineEdit(this);edit->setProperty("text","hello"); QPlainTextEdit
设置其plainText属性 QPlainTextEdit *edit = new QPlainTextEdit(this);edit->setProperty("plainText","hello"); QTextEdit QTextEdit *edit = new QTextEdit(this);edit->setProperty("html","hello"); QComboBox QComboBox *box = new QComboBox(this);box->setProperty("currentText","hello");//前提下拉框中本就有这一项内容 QTimeEdit QTimeEdit *edit = new QTimeEdit(this);edit->setProperty("time","10:00:00"); QDateEdit QDateEdit *edit = new QDateEdit(this);edit->setProperty("data", "2020-10-10"); QDataTimeEdit QDataTimeEdit *edit = new QDataTimeEdit(this);edit->setProperty("dataTime","2020-10-10 10:00:00");
这些属性名可以在设计师中看到，其中"placeholderText"属性是当控件没有内容显示时，则会显示这个属性设置的内容作为控件背景