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並前往https://books.google.com.tw/books?id=nyxoEiGHKtoC&pg=PA159&lpg=PA159&dq=qpushbutton+signal&source=bl&ots=oMmwoyHfAC&sig=ACfU3U111POJAFdbT0re9nzCCTPlYEpI8g&hl=zh-TW&sa=X&ved=2ahUKEwiWntvepo32AhUQBZQKHRLjCyIQ6AF6BQjLAhAD

Foundations of Qt Development - 第 159 頁 - Google 圖書結果

QPushButton *buttonClear = new QPushButton( tr("C") ); layout->addWidget( ... from the buttons are all connected to the map() slot of the signal mapper.

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