1、概述
源码放在文章末尾

该项目实现通过回车键让光标从一个编辑框跳转到另一个编辑框，下面是demo演示：

项目部分代码如下：

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>namespace Ui {
class Widget;
}class Widget : public QWidget
{Q_OBJECTpublic:explicit Widget(QWidget *parent = 0);~Widget();private:Ui::Widget *ui;private slots:void next();
};#endif // WIDGET_H

#include "widget.h"
#include "ui_widget.h"
#include "qlineedit.h"Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget)
{ui->setupUi(this);connect(ui->lineEdit1, SIGNAL(returnPressed()), this, SLOT(next()));connect(ui->lineEdit2, SIGNAL(returnPressed()), this, SLOT(next()));connect(ui->lineEdit3, SIGNAL(returnPressed()), this, SLOT(next()));
}Widget::~Widget()
{delete ui;
}void Widget::next()
{QLineEdit *lineEdit = (QLineEdit *)sender();if (lineEdit == ui->lineEdit1) {ui->lineEdit2->setFocus();} else if (lineEdit == ui->lineEdit2) {ui->lineEdit3->setFocus();} else if (lineEdit == ui->lineEdit3) {ui->lineEdit1->setFocus();}
}

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