QSignalMapper的使用
1. 可以吧无参数的信号转换为带int参数、带QString参数、带QObject参数、带QWidget参数的信号，
假如Qwidget上有许多Button，如果一一建立信号槽，显得繁琐，这时我们可以使用QSignalMapper
[cpp] view plain copy #include "MainWindow.h" #include "ui_MainWindow.h" #include <QHBoxLayout> #include <QVBoxLayout> #include <QString> #include <QStringList> #include <QGridLayout> #include <QPushButton> #include <QLineEdit> #include <QSignalMapper> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); init(); } MainWindow::~MainWindow() { delete ui; } void MainWindow::init() { QGridLayout *pLayout = new QGridLayout(); this->centralWidget()->setLayout(pLayout); QString str = "Button1,Button2,Button3,Button4,Button5,Button6,Button7,Button8"; QStringList strList = str.split(","); QSignalMapper *pMapper = new QSignalMapper(); for (int i = 0; i < strList.length(); ++i) { QPushButton *pBtn = new QPushButton; pBtn->setText(strList.at(i)); connect(pBtn, SIGNAL(clicked()), pMapper, SLOT(map())); pMapper->setMapping(pBtn, pBtn->text()); pLayout->addWidget(pBtn, i, 0); } QLineEdit *pEdit = new QLineEdit(); connect(pMapper, SIGNAL(mapped(QString)), pEdit, SLOT(setText(QString))); pLayout->addWidget(pEdit, 0, 1); } 转自：http://blog.csdn.net/mcgrady_tracy/article/details/6996947
