Qt5 5种connect

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//Qt5 5种connect()

#include<QApplication>

#include<QLabel>

#include<QPushButton>

#include<QDebug>

//1.connect(const QObject *,const char *,const QObject&,const char*,Qt::ConnectType);

//2.connect(const QObject *,const QMetaMethod &,const QObject *,const QMetaMethod &,Qt::ConnectType);

//3.connect(const QObject *,const char *,const char *,Qt::ConnectType)const;

//4.connect(const QObject *,PointToMemberFunction(成员函数指针),const QObject *,PointToMemberFunction,Qt::ConnectType);

//5.connect(const QObject *,PointToMemberFunction,Functor);

//Qt::ConnectType会在后续博文讨论，再此不做深究

int main(int argc,char *argv[])

    QApplication app(argc,argv);

    QPushButton button("停止");

    //1.QObject::connect(&button,SIGNAL(clicked()),&app,SLOT(quit()));

    //SIGNAL,SLOT,是预定义的宏用于将成员函数转化为const char*

    //3.第三种情况实质上是第一种情况的变体，是对类中this的操作或第三个参数是static函数可不必列出

    //4.QObject::connect(&button,&QPushButton::clicked,&app,&QApplication::quit);

   //5. QObject:: connect(&button,&QPushButton::clicked,[](bool){qDebug() << "you clicked button";});

    button.show();

    return app.exec();

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