how can iterate foreach item in QListWidget

[umen]

i just can find any example in the internet how to loop and get each item in the QListWidget. i need something like this : ( this is not working example ) :

QListWidget* wl = ui.listWidget_selected;
   for (QWidget* w = wl.first(); w != 0; w = wl.next()) {
   {
        QListWidgetItem* item = ((QListWidgetItem*)w);
        QString itemData = item->data(Qt::UserRole).toString();
   }

QListWidget* wl = ui.listWidget_selected;
   for (QWidget* w = wl.first(); w != 0; w = wl.next()) {
   {
        QListWidgetItem* item = ((QListWidgetItem*)w);
        QString itemData = item->data(Qt::UserRole).toString();
   }

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again this is not working