Qt 小技巧 根据显示文本、信号槽创建QPushButton

/**
  descr：创建QPushButton的实例
  input：text 按钮上显示的内容；receiver 按钮创建信号槽时的槽对象；member 接受信号的槽
  output：void
  return：创建的QPushButton实例
*/
QPushButton *Screenshot::createButton(const QString &text, QWidget *receiver,
                                      const char *member)
{
    QPushButton *button = new QPushButton(text);
    
    button->connect(button, SIGNAL(clicked()), receiver, member);

    return button;
}

QPushButton *quitScreenshotButton;
quitScreenshotButton = createButton(tr("Quit"), this, SLOT(close()));