信号重载
最常见的重载信号就是QComboBox::currentIndexChanged，它有int和const QString &两种重载参数
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| connect(ui->algorithm, QOverload<int>::of(&QComboBox::currentIndexChanged), this, [=](int index) {
if(index == 0) {
this->initTable(PID);
}
else {
this->initTable(Model);
}
emit this->changeAlgorithm(index);
});
connect(ui->algorithm, QOverload<const QString &>::of(&QComboBox::currentIndexChanged), this, [=](const QString &text) {
qDebug() << text;
});
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槽函数重载
以传递自定义参数类型为例，自定义结构体需要注册成Qt的元数据类型
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| #pragma pack (4)
typedef struct {
...
} TAlgorithmModel;
#pragma pack ()
Q_DECLARE_METATYPE(TAlgorithmModel *)
#pragma pack (4)
typedef struct {
...
} TAlgorithmPid;
#pragma pack ()
Q_DECLARE_METATYPE(TAlgorithmPid *)
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发送方信号
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void NetworkManager::updateModel(const TAlgorithmModel *);
void NetworkManager::updatePid(const TAlgorithmPid *);
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接收方槽函数重载
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void OperatePage::onUpdateTable(const TAlgorithmModel *p);
void OperatePage::onUpdateTable(const TAlgorithmPid *p);
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信号和槽写法参考
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| connect(NetworkManager::getInstance(), &NetworkManager::updateModel, operate, QOverload<const TAlgorithmModel *>::of(&OperatePage::onUpdateTable));
connect(NetworkManager::getInstance(), &NetworkManager::updatePid, operate, QOverload<const TAlgorithmPid *>::of(&OperatePage::onUpdateTable));
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