QT之QTreeWidget

1、获取QTreeWidget的列数

ui->treeWidget->columnCount();

2、添加父节点

QTreeWidgetItem *item = new QTreeWidgetItem(ui->treeWidget);
item->setText(0, "父节点");

3、在父节点下添加子节点

QTreeWidgetItem *newItem = new QTreeWidgetItem(item);    //item指父节点
newItem->setText(0, strList.at(i));
item->addChild(newItem);

4、获取父节点个数

ui->treeWidget->topLevelItemCount();

5、获取父节点下子节点个数

for(int i = 0; i < ui->treeWidget->topLevelItemCount(); i++){ 
　　qDebug()<<ui->treeWidget->topLevelItem(i)->childCount()
｝

 

6、删除节点

QTreeWidgetItem *item = ui->treeWidget->currentItem();
if(NULL == item){
    return;
}
QTreeWidgetItem *parent = item->parent();
if(NULL == parent){
    int a = ui->treeWidget->currentIndex().row();
    ui->treeWidget->takeTopLevelItem(a);
    delete item;
    item = NULL;
}
else{
    int a = ui->treeWidget->currentIndex().row();
    QTreeWidgetItem *currentItem =  parent->takeChild(a);
    delete currentItem;
    currentItem = NULL;
}