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Qt: 在SLOT中获取sender(触发SIGNAL的控件)


Qt开发,有个场景是点击三个不同的按钮,触发同一个事件(SLOT),要在SLOT方法中区分三个不同的按钮:

connect(ui->btnType1, SIGNAL(clicked()),this,SLOT(changeType2()));
connect(ui->btnType2, SIGNAL(clicked()),this,SLOT(changeType2()));
connect(ui->btnType3, SIGNAL(clicked()),this,SLOT(changeType2()));
...

void FormCL3P::changeType2()
{
//获取被点击的按钮
//?
}

那么怎样在SLOT中获取当前的sender呢?网上查到了答案。

用sender()方法:

void FormCL3P::changeType2()
{
QObject* btn = sender();
if (btn == ui->btnType1){ ... }
if (btn == ui->btnType2){ ... }
if (btn == ui->btnType3){ ... }
}

参考:​​In qml, How can i get signal sender from slot/function? | Qt Forum​​

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