Qt 设置QTreeWidget的列宽

1 tree = new QTreeWidget(this);  
2 
3 this->setSelectionMode(QAbstractItemView::ExtendedSelection);
4 
5 tree->setColumnCount(2);
6 
7 this->setColumnWidth(0, 100);  //设置列宽
8 
9 this->setColumnWidth(1, 300);