在QTreeWidget中删除QTreeWidgetItem

我就想删除topLevelItem  stackoverflow上是这样说的:

http://stackoverflow.com/questions/9392051/how-do-i-delete-a-top-level-qtreewidgetitem-from-a-qtreewidget

http://stackoverflow.com/questions/9986231/getting-a-qtreewidgetitem-list-again-from-qtreewidget

 

以下代码ProjDataView这个类只是单纯继承QTreeWidget


 1 #include "ProjDataView.h"

 2 

 3 

 4 

 5 

 6 int main(int argc, char *argv[])

 7 {

 8 QApplication a(argc, argv);

 9 

10 

11 ProjDataView* dataView = new ProjDataView(0);

12 

13 for (int i = 0; i < 5; ++i){

14 

15 QTreeWidgetItem* item = new QTreeWidgetItem(QStringList() << QString("test") + QString::number(i));

16 

17 

18 dataView->addTopLevelItem(item);

19 

20 }

21 

22 

23 

24 

25 for (int i = 0; i < dataView->topLevelItemCount(); ++i){

26 

27 delete dataView->takeTopLevelItem(i);

28 

29 }

30 

31 

32 

33 

34 dataView->show();

35 

36 

37 

38 

39 

40 

41 //MyManagerWidget* mng = new MyManagerWidget(0);

42 

43 

44 //mng->show();

45 

46 return a.exec();

47 

48 }

 




在QTreeWidget中删除QTreeWidgetItem

 

如果用上述的代码是不对的,所以从窗口中看出才删除了test0,test2,test4.

如果要全删除的话可以这样:

while(dataView->topLevelItemCount() > 0){delete dataView->topLevelItem(0);}


那个for里边每执行一次dataView->topLevelItemCount()都会变化,

相应的dataView->topLevelItem(i),也是会变化的。完全不对。

 

不过我最终考虑用clear

参照这个:http://stackoverflow.com/questions/13062327/how-to-delete-qtreewidgetitem

 

references:

http://tieba.baidu.com/p/3849541021?pid=70405672647#70405672647

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