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.