How can Qml change the value of model data in C++ to make Listview display the response?

I wrote a function

void Module::reset()

The value of model in Listview is reset inside. And it did change, but it did not change immediately on the Listview display

The function at the beginning is written like this

void Module::reset(){
    for(unsigned int i=0;i<module_.size();i++){
        QModelIndex start_index = createIndex(i, 0);
        setData(start_index,module_[i]->default_value_.data(),1);
    }
}

There is a change but there is no immediate response, the correct value will be displayed only after receiving the switch

Two lines of code were added afterwards:

void Module::reset(){
    beginResetModel();
    for(unsigned int i=0;i<module_.size();i++){
        QModelIndex start_index = createIndex(i, 0);
        setData(start_index,module_[i]->default_value_.data(),1);
    }
    endResetModel();
}

It turns out that to operate on data, you must write the corresponding begin and end. Listview will change dynamically.
There are several types: