我真不知道我错哪了啊

Question

void MYXIANMU::on_comboBox2_currentIndexChanged(const QString& arg1)
{
   connect(ui.comboBox2, SIGNAL(currentIndexChanged(const QString &text)),ui.plainTextEdit, SLOT(on_comboBox2_currentIndexChanged(const QString&)));
   QString zone = ui.comboBox2->currentData().toString();
   ui.plainTextEdit->appendPlainText(arg1 + tr(":区号=") + zone);
   
   
 }  
运行之后plaintextEdit就是不会显示combobox的字

Answer 1

你先设置个断点，看on_comboBox2_currentIndexChanged到底执行了没有