QMessageBox简单使用

首先要调用

#include <QMessageBox>

然后

            QMessageBox msgBox;
            msgBox.setWindowTitle("错误");
            msgBox.setText("除数不能为零");
            msgBox.exec();

或者简单点

QMessageBox::warning(this,"错误","除数不能为零");

常用的弹出框类型

1. Question
   
   For asking a question during normal operations.
2. Information
   
   For reporting information about normal operations.
3. Warning
   
   For reporting non-critical errors.
4. Critical
   
   For reporting critical errors.