如何显示时间 [复制链接]

我想提取系统时间，得到三个时间参数，然后现是用QLineEdit显示，该怎样做？我的老出错。下面使我写的
mytime.h
#include <QTime>
#include <QtGui>
#include <QDialog>
#include <QString>
#include <QLineEdit>
#include <QMainWindow>

int ihour;
int isecond;
int iminute;
class QString string;
class MyTime:public QMainWindow{
  Q_OBJECT
public:
  MyTime(QMainWindow *parent=0);
signals:
  void timeChanged(QTime *time);
public slots:
  void update(QTime *time);
private:
  QTime time;
  QLineEdit *mline;  
};

mytime.cpp
#include "mytime.h"

MyTime::MyTime(QMainWindow *parent)
    :QMainWindow(parent){
  time=new QTime::currentTime();
  ihour=time.hour();
  isecond=time.second();
  iminute=time.minute();
  QSting string("%03d:%02d:%02d",ihour,isecond,iminute);
  mline=new QLineEdit;
  mline->setGeometry(1,1,15,15);
  mline->setReadOnly(TRUE);
  //mline->insert(&string);

  connect(SIGNAL(timeChanged(QTime &time)),mline,SLOT(update(QTime &time)));
  //connect(time,SIGNAL(timeChanged(QTime *)),this,SIGNAL(timeChanged(QTime *)));
}

void MyTime::update(QTime *time){
  time=new QTime::currentTime();
  ihour=time.hour();
  isecond=time.second();
  iminute=time.minute();
  QString string("%03d:%02d:%02d",ihour,isecond,iminute);
  mline->insert(&string);
  emit timeChanged(QTime &time);
}
我刚开始学着写，错误很多，想通过这个跟大家学一下，好有为何我用QMultiLineEdit时，编译说没有此文件啊？谢谢大家。

QSting string("%03d:%02d:%02d",ihour,isecond,iminute);

玩qt这么多年了
也没见过这种用法呀

初学不怕
多看文档和实例
不要太想当然了

Sorry,I don't know how to use String to add my three parameters,ihour,isecond and iminute.
If someone can help me,please!
Thank you very much!

确一下Assistant中的QTime的文档
QTime::toString("hh:mm:ss")

Thank you XChinux,I don't know why in the past few days I can't come here,but I have resolved it:
QString string;
string = QString("%1:%2:%3").arg(ihour).arg(iminute).arg(isecond);
QLineEdit *line = new QLineEdit;
  line -> setText(string);
That's ok!Now I have another question,I will send a new title,hope you can give me some advice,so that I can save much
time,Thank you very much!

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改变窗体的title，可以用setWindowTitle(QString)这个方法。