近来做项目发现，多个窗体之间要通信真的好麻烦，比如：A调出B，B调出C,那么C给A发消息，那就得经过B转发才能实现。对于两三层窗

#include "globalObserver.h" globalObserver* globalObserver::m_pInst; globalObserver::globalObserver(QObject* parent) { } globalObserver::~globalObserver() { //释放列表数据 QList<relationData*>::iterator iter = m_oRelationList.begin(); while (iter != m_oRelationList.end()) { delete (*iter)->obesrverApater; delete* iter; iter++; } } globalObserver* globalObserver::getGlobalObserver() { if (!m_pInst) { m_pInst = new globalObserver(); } return m_pInst; } void globalObserver::release() { if (m_pInst) delete m_pInst; } //观察者绑定函数实现 void globalObserver::attach(const QString type, QObject* reciver, const char* method) { obesrverApater* oA = obesrverApaterFactory::getInst()->createObesrverApater(); connect(oA, SIGNAL(notify()), reciver, method); relationData* data = new relationData(); data->type = type; data->reciver = reciver; data->obesrverApater = oA; m_oRelationList.append(data); } // 观察者解绑函数实现 void globalObserver::detach(const QString type, const QObject* reciver) { QList<relationData*>::iterator iter = m_oRelationList.begin(); while (iter != m_oRelationList.end()) { if ((*iter)->type.compare(type) == 0 && (*iter)->reciver == reciver) { relationData* data = *iter; m_oRelationList.removeOne((*iter)); delete data->obesrverApater; delete data; return; } iter++; } } //观察者触发函数实现 void globalObserver::notify(const QString type) { QList<relationData*>::iterator iter = m_oRelationList.begin(); while (iter != m_oRelationList.end()) { if ((*iter)->type.compare(type) == 0) { emit(*iter)->obesrverApater->notify(); } iter++; } }