QSignalMapper基本用法(无参的信号转化成有参的信号)

QSignMapper *mapper = new QSignMapper(this)

QPushButton *btn1 = new QPushButton(this);

btn1->setText("btn1");

QPushButton *btn2 = new QPushButton(this);

btn2->setText("btn2");

mapper->setMapping(btn1,btn1->text());

mapper->setMapping(btn2,btn2->text());

connect(btn1,SIGNAL(clicked()),mapper,SLOT(map()));

connect(btn2,SIGNAL(clicked()),mapper,SLOT(map()));

connect(mapper,SIGNAL(map(QString),this,SLOT(disStr(QString)));

 整体的作用是通过一个无参的信号转化成有参的信号，然后传给槽函数进行操作