我很感激它,當有人可以幫助我。我不習慣C++。我對它很陌生。C++訪問對象,QT
我的問題:我想使一個對象「玩家」可用於另一個類。我不知道如何歸檔。
的main.cpp
#include "mainwindow.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
mainwindow.h
#include <QMainWindow>
#include <QMediaPlayer>
#include <QDebug>
#include "Leap.h"
#include <leapmotionlistener.h>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
QMediaPlayer* player;
private slots:
....
private:
Ui::MainWindow *ui;
void initialize();
Controller controller;
LeapMotionListener leapMotionListener;
};
#endif // MAINWINDOW_H
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QSound>
#include <iostream>
#include <QfileDialog>
using namespace std;
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
player = new QMediaPlayer(this);
connect(player, &QMediaPlayer::positionChanged, this, &MainWindow::on_positionChanged);
connect(player, &QMediaPlayer::durationChanged, this, &MainWindow::on_durationChanged);
initialize();
}
QString path;
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::initialize(){
controller.addListener(leapMotionListener);
leapMotionListener.setPlayer(player);
controller.setPolicy(Leap::Controller::POLICY_BACKGROUND_FRAMES);
}
...
leapmotionlistener.h
#ifndef LEAPMOTIONLISTENER
#define LEAPMOTIONLISTENER
#include <iostream>
#include <cstring>
#include "Leap.h"
#include <QFile>
#include <QAudioOutput>
#include <QMediaPlayer>
using namespace Leap;
class LeapMotionListener : public Listener {
public:
LeapMotionListener();
void setPlayer(QMediaPlayer&);
//... some more methods
private:
QMediaPlayer player;
};
#endif // LEAPMOTIONLISTENER
leapmotionlistener.cpp
//calls the player object in one method like the following
player.stop();
我的主要問題是:我在做什麼錯,而引用和實例?那麼leapmotionlistener如何訪問同一個播放器對象(我想影響音頻)?
我得到的錯誤:
MusicPlayer\mainwindow.cpp:32: Error: C2664: 'void LeapMotionListener::setPlayer(QMediaPlayer &)' : converting from argument 1 'QMediaPlayer *' in 'QMediaPlayer &' not possible
這個小項目是下載使用以下鏈接可快速查看: https://www.dropbox.com/s/igr7ywnvicdlxxd/MusicPlayer.zip?dl=0
提前感謝!
感謝。你的回答不夠詳細,因爲我對C++的理解很差。但現在它的工作。 – qecce