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[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();
    }


    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(1);
    mylist<<1<<2<<3<<4;

    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(1);
    mylist<<1<<2<<3<<4;

    QMutableListIterator<int> myi(mylist);
    myi.toFront();
    while(myi.hasNext())
    {
        int tmp = myi.next()*2;
        myi.setValue(tmp);
        qDebug()<<tmp;
    }

 
    return a.exec();
}