写了一个信号-槽的连接语句:connect(ui.lineEdit, SIGNAL(textChanged(const QString &)), this,SLOT(on_lineEdit_textChanged(const QString &)));写了一个信号-槽的连接语句:connect(ui.lineEdit, SIGNAL(textC
写了一个信号-槽的连接语句:connect(ui.lineEdit, SIGNAL(textChanged(const QString &)), this,SLOT(on_lineEdit_textChanged(const QString &)));写了一个信号-槽的连接语句:connect(ui.lineEdit, SIGNAL(textC