c++ - 获取行编辑输入数据

Question

我是 qt4 的新手，我正在尝试获取输入的文本数据。但我没有得到。

谁能帮帮我？我将不胜感激。

谢谢。

我正在做的事的例子:

添加用户.cpp

#include <QtGui>
#include "adduser.h"

myQt_user::myQt_user(QDialog *parent)
{
    setupUi(this); // this sets up GUI
    connect(pushButton_adduser, SIGNAL(clicked()), this, SLOT(add_user()));
}

void myQt_user::add_user()
{
    users = lineEdit_user->text();
    QMessageBox::information(this, tr("Data"),tr("Get user:" +users ));

}

添加用户.h

#ifndef ADDUSER_H
#define ADDUSER_H

#include "ui_dialog_useradd.h"


class myQt_user: public QDialog, private Ui::windows_add
{
    Q_OBJECT

public:
        myQt_user(QDialog *parent = 0);
        QLineEdit *lineEdit_user;
        QString users;

public slots:
        void add_user();
};

#endif

错误:

adduser.cpp:-1: In member function 'void myQt_user::add_user()':

adduser.cpp:13: error: no matching function for call to 'myQt_user::tr(const QString)'

adduser.h:9: candidates are: static QString myQt_user::tr(const char*, const char*)

adduser.h:9: note: static QString myQt_user::tr(const char*, const char*, int)

Answer 1

Qt 的实现方式如下:

QMessageBox::information(this, tr("Data"), tr("Get user:" +users ));

应该是

QMessageBox::information(this, tr("Data"), tr("Get user: %1").arg(users));