Qt之获取子部件

Qt5.10

QList<QObject*> list_children = this->children();

for(int i=0;i<list_children.size();i++)

{

QObject *child = list_children.at(i);

QString object_name = child->objectName();
//找到对象名称为lineEdit的控件

if(object_name == QString("lineEdit"))

{
//强制类型装换，将 QObject* 转换为QLineEdit*

QLineEdit *p_edit = dynamic_cast<QLineEdit*>(child);

if(p_edit)

{

p_edit->setText("test");

}

}

}后记：c++强制类型转换详解可参照：https://www.cnblogs.com/Allen-rg/p/6999360.htmlQt帮助文档中直接根据控件名称获取部件的方法：
QPushButton *button = parentWidget->findChild<QPushButton *>("button1");帮助文档中还有许多详细介绍，帮助我们快读找到想要获取的部件，例如：
This example returns all QPushButtons that are children of parentWidget:
QList<QPushButton *> allPButtons = parentWidget.findChildren<QPushButton *>();