Qt / C ++：从另一个类获取Ui QLineEdit文本

我正在尝试进行一个简单的测试，以使用通过“ Qt Design”制作的UI对象，但对于Qt和C ++来说我还是很陌生。我有一个非常简单的Ui：3 LineEdits和1 PushButton：IMAGE : the UI window

我有一个应该控制Ui的客户端类。它连接，QPushButton并且应该从中获取内容QLineEdit。但是QDebug，即使更改QlineEdit字段，即使按以下按钮，输入结果也始终相同：“ Client connected：”“：0”

而且，如果我将on_pushButton_clickedQtDesign与made一起使用，它将显示QlineEdits的真实值。

为什么QStrings总是一样？我要传递初始对象的副本吗？怎么解决呢？

这是制作影片的好方法ViewController吗？否则，什么是好的方法？

Client.cpp

#include "client.h"
#include "mainwindow.h"
#include "logwindow.h"

Client::Client()
{
    LogWindow* w1 = new LogWindow();
    MainWindow* w2 = new MainWindow();

    _stack = new QStackedWidget();
    _stack->addWidget(w1);
     connect(w1->getButton(),SIGNAL(clicked()),this,SLOT(connexion()));

    _stack->addWidget(w2);
    _stack->show();
}

//When the button is Pushed, gets the content from QlineEdits and prints them
void Client::connexion()
{
    QString ip=(LogWindow (_stack->currentWidget())).getIP();
    int port=((LogWindow (_stack->currentWidget())).getPort()).toInt();

    socket = new QTcpSocket(this);
    socket->connectToHost(ip, port);

    _stack->setCurrentIndex((_stack->currentIndex()+1)%_stack->count());
    qDebug() <<"Client connected : " << ip << ":"<<port;
}

还有一个Qt自动创建的类：

LogWindow.cpp

#include "logwindow.h"
#include "ui_logwindow.h"



LogWindow::LogWindow(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::LogWindow)
{
    ui->setupUi(this);
}

LogWindow::~LogWindow()
{
    delete ui;
}


QPushButton* LogWindow::getButton()
{
    return ui->pushButton;
}

QString LogWindow::getIP()
{
    //LineEdit named "IP_text"
    return ui->IP_text->text();
}

QString LogWindow::getPort()
{
    //LineEdit named "Port_text"
    return ui->Port_text->text();
}

LogWindow.h

namespace Ui {
class LogWindow;
}

class LogWindow : public QWidget
{
    Q_OBJECT

public:
    explicit LogWindow(QWidget *parent = 0);
    ~LogWindow();
    QPushButton* getButton();
    QString getIP();
    QString getPort();

private slots:
    void on_pushButton_clicked();

private:
    Ui::LogWindow *ui;
};