QObject::connect(ui->lineEdit, SIGNAL(textChanged(const QString &),form1->m_ui->lineEdit, SLOT(changeText(const QString &));
/home/tsuibin/Work/Keyboard/mainwindow.cpp:817: 错误: 调用宏“SIGNAL”时参数列表未终止
/home/tsuibin/Work/Keyboard/mainwindow.cpp:154: 错误: ‘SIGNAL’在此作用域中尚未声明