1、主要使用到的QT函数原型定义:
template <typename Container> inline void qDeleteAll(const Container &c) { qDeleteAll(c.begin(), c.end()); }
#if QT_CONFIG(regularexpression) template<typename T> inline QList<T> findChildren(const QRegularExpression &re, Qt::FindChildOptions options = Qt::FindChildrenRecursively) const { typedef typename std::remove_cv<typename std::remove_pointer<T>::type>::type ObjType; QList<T> list; qt_qFindChildren_helper(this, re, ObjType::staticMetaObject, reinterpret_cast<QList<void *> *>(&list), options); return list; } #endif // QT_CONFIG(regularexpression)
2、实现 释放(delete)QTableWidget中动态增加(new)的子控件
qDeleteAll(ui->tableWidget->findChildren<MyComboBox *>());
qDeleteAll(ui->tableWidget->findChildren<MyDoubleSpinBox *>());
MyComboBox、MyDoubleSpinBox分别是继承自QComboBox、QDoubleSpinBox的自定义类,当子控件为其他类型时,将MyComboBox 或MyDoubleSpinBox
修改为需要寻找的子控件的类型即可。