qt過載訊號槽連線方式總結

一、qt4方式:

qobject::connect(訊號發出者位址, signal(訊號發出者函式名稱(訊號發出者函式引數...)),訊號接收者位址, slot(訊號接收者槽函式名稱(訊號接收者槽函式引數...)));

注意：若在qobject子類內部定義訊號槽，可直接呼叫connect函式。

二、qt5方式:

1、普通訊號

qobject::connect(訊號發出者位址,訊號發出者函式名稱(訊號發出者函式引數...),訊號接收者位址,訊號接收者槽函式名稱(訊號接收者槽函式引數...));

注意：若在qobject子類內部定義訊號槽，可直接呼叫connect函式。

2、過載的訊號

2.1採用函式指標

void (型別:* ptroverloadsignalfunction)(訊號過載函式引數...)=&型別:: 訊號;

qobject::connect(訊號發出者位址,ptroverloadsignalfunction,訊號接收者位址,訊號接收者槽函式名稱(訊號接收者槽函式引數...));

2.2採用static_cast

qobject::connect(訊號發出者位址,static_cast(&型別:: 訊號),訊號接收者位址,訊號接收者槽函式名稱(訊號接收者槽函式引數...));

2.3採用qoverload

qobject::connect(訊號發出者位址,qoverload《訊號過載函式引數...>::of(&型別:: 訊號),訊號接收者位址,訊號接收者槽函式名稱(訊號接收者槽函式引數...));

三、示例

class signalsender:public qobject

class signalreceiver:public qobject

void initconnections()

{signalsender sender;

signalreceiver receiver;

//以下方式任取其一

//方式1：qt4

qobject::connect(sender，signal(overloadsignalfunction(bool)),receiver,slot(overloadsignalfunctionslot(bool)));

qobject::connect(sender，signal(overloadsignalfunction(bool,int)),receiver,slot(overloadsignalfunctionslot(bool,int)));

//方式2：qt5之函式指標

void (signalsender::* ptroverloadsignalfunction1)(bool)=&signalsender::overloadsignalfunction;

void (signalreceiver::* ptroverloadsignalfunctionslot1)(bool)=&signalreceiver::overloadsignalfunction;

qobject::connect(sender,ptroverloadsignalfunction1,receiver,ptroverloadsignalfunctionslot1);

void (signalsender::* ptroverloadsignalfunction2)(bool,int)=&signalsender::overloadsignalfunction;

void (signalreceiver::* ptroverloadsignalfunctionslot2)(bool,int)=&signalreceiver::overloadsignalfunction;

qobject::connect(sender,ptroverloadsignalfunction2,receiver,ptroverloadsignalfunctionslot2);

//方式3：qt5之static_cast

qobject::connect(sender,static_cat(&signalsender::overloadsignalfunction),receiver,static_cat(&signalreceiver::overloadsignalfunctionslot));

//方式4：qt5之qoverload

qobject::connect(sender,qoverload::of(&signalsender::overloadsignalfunction),receiver,qoverload::of(&signalreceiver::overloadsignalfunctionslot));