针对你遇到的问题“qmessagebox has not been declared”,这通常意味着编译器在编译代码时未能找到QMessageBox的定义。下面是一些可能的解决步骤和原因分析: 确认QMessageBox所属的库或框架: QMessageBox是Qt框架中的一个类,用于显示消息框。因此,确保你的项目是基于Qt框架开发的。 检查是否已经正确包含或导入了Q...
You may not have noticed this, but the order the buttons are passed in, has no impact on how they appear on the message box. Default Button Look at the above image again. You’l have noticed that there is a blue outline around the “OK” button. This is the symbol of the default ...