4.QList

 #include "mainwindow.h"
 #include <QApplication>
 #include <QLabel>
 #include <list>
 #include <QList>
 #include <QDebug>
 using namespace std;

 //STL list
 int main1(int argc, char *argv[])
 {
     QApplication a(argc, argv);
     //MainWindow w;
     //w.show();
     list<QLabel*> mylist;

     char *str[]={"hello1","hello2","hello3","hello4","hello5"};
     for(int i=;i<;i++)
     {
         QLabel *p = new QLabel(str[i]);
         mylist.push_back(p);
     }
     int i=;
     for(auto X:mylist)
     {
         X->move(i++*,i++*);
         X->show();
     }

     return a.exec();
 }

 //QListIterator迭代器数据只能读不能写
 int main2(int argc, char *argv[])
 {
     QApplication a(argc, argv);
 //    QList<QLabel*> mylist;

 //    char *str[5]={"hello1","hello2","hello3","hello4","hello5"};
 //    for(int i=0;i<5;i++)
 //    {
 //        QLabel *p = new QLabel(str[i]);
 //        mylist.push_back(p);
 //    }
 //    int i=0;
 //    for(auto X:mylist)
 //    {
 //        X->move(i++*100,i++*100);
 //        X->show();
 //    }

     QList<int> mylist;
     mylist.push_back();
     mylist<<<<<<<<;

     QListIterator<int> myi(mylist);
     while(myi.hasNext())
     {
         qDebug()<<myi.next();
     }

     return a.exec();
 }

 // QMutableListIterator数据能读能写
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);

     QList<int> mylist;
     mylist.push_back();
     mylist<<<<<<<<;

     QMutableListIterator<int> myi(mylist);
     myi.toFront();
     while(myi.hasNext())
     {
         int tmp = myi.next()*;
         myi.setValue(tmp);
         qDebug()<<tmp;
     }

     return a.exec();
 }