QT多个按钮信号绑定一个槽函数，执行不同业务逻辑。

	//例如这样：
    connect(btn1,SIGNAL(clicked()),this,SLOT(getText1()));
    connect(btn2,SIGNAL(clicked()),this,SLOT(getText2()));
    connect(btn3,SIGNAL(clicked()),this,SLOT(getText3()));
    connect(btn4,SIGNAL(clicked()),this,SLOT(getText4()));
    connect(btn5,SIGNAL(clicked()),this,SLOT(getText5()));
	//然后再去实现getText1，getText2，getText3，getText4，getText5

QSignalMapper * myMapper;
myMapper = new QSignalMapper(this);
QPushButton * button[8]={ui->pushButton_1,ui->pushButton_2,ui->pushButton_3,ui->pushButton_4,
                         ui->pushButton_5};
   for(int i = 0;i<5;i++)
   {
        connect(button[i], SIGNAL(clicked(bool)), myMapper, SLOT(map()));//这个map(）是QSignalMapper类的槽函数，不需要我们定义
        myMapper->setMapping(button[i], i);//这个i就是我们传给槽函数的值，可以是字符串，其他等等，判断五个按钮，使用整行就可以了。
   }
connect(myMapper, SIGNAL(mapped(int)), this, SLOT(getText(int)));

//然后我们编写getText(int)这个槽函数即可

void MainWindow::setPushButton(int index)
{
	switch(index)
	{
	    case0:
	//业务逻辑
	break;
		case1:
	//业务逻辑
	break;
		case2:
	//业务逻辑
	break;
		case3:
	//业务逻辑
	break;
		case4:
	//业务逻辑
	break;
	}
}