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QMessageBox-枚举值
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‎03-QtWidgets-常用控件/12-Dialog-对话框/05-QMessageBox-信息提示框/a1-QMessageBox-枚举值.md

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# QMessageBox-枚举值
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由于 [QMessageBox](https://doc.qt.io/qtforpython/PySide6/QtWidgets/QMessageBox.html) 类中包含大量的枚举值类型，故单独摘录整理至本文档中。
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## [ButtonRole](https://doc.qt.io/qt-6/qmessagebox.html#ButtonRole-enum)
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| 常量 | 值 | 描述 |
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| --------------- | ---- | ------------------------------------------------------------ |
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| InvalidRole | -1 | 该按钮无效 |
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| AcceptRole | 0 | 按下该按钮表示对话被接受（例如 `OK`） |
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| RejectRole | 1 | 按下按钮表示对话被拒绝（例如 `Cancel`） |
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| DestructiveRole | 2 | 按下此按钮会导致破坏性更改（例如「放弃所有更改」）并关闭对话框 |
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| ActionRole | 3 | 单击此按钮会导致对话框中的元素发生变化 |
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| HelpRole | 4 | 按下此按钮以请求帮助 |
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| YesRole | 5 | 按钮类似于 "Yes" |
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| NoRole | 6 | 按钮类似于 "No" |
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| ResetRole | 7 | 该按钮将对话框的字段重置为默认值 |
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| ApplyRole | 8 | 该按钮应用当前更改 |
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## [Icon](https://doc.qt.io/qt-6/qmessagebox.html#Icon-enum)
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| 常量 | 值 | 描述 |
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| ----------- | ---- | ------------------------------ |
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| NoIcon | 0 | 消息提示框没有任何图标 |
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| Information | 1 | 表示普通消息（没有异常）的图标 |
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| Warning | 2 | 表示警告的图标 |
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| Critical | 3 | 表示严重问题的图标 |
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| Question | 4 | 表示询问的图标 |
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## [StandardButton](https://doc.qt.io/qt-6/qmessagebox.html#StandardButton-enum)
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| 常量 | 值 | 描述 | 按钮角色 |
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| --------------- | ---------- | -------------------------------- | --------------- |
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| Ok | 0x00000400 | "OK" 按钮 | AcceptRole |
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| Open | 0x00002000 | “打开”按钮 | AcceptRole |
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| Save | 0x00000800 | “保存”按钮 | AcceptRole |
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| Cancel | 0x00400000 | “取消”按钮 | RejectRole |
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| Close | 0x00200000 | “关闭”按钮 | RejectRole |
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| Discard | 0x00800000 | “放弃”或“不保存”按钮，取决于平台 | DestructiveRole |
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| Apply | 0x02000000 | “应用”按钮 | ApplyRole |
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| Reset | 0x04000000 | “重置”按钮 | ResetRole |
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| RestoreDefaults | 0x08000000 | “恢复默认值”按钮 | ResetRole |
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| Help | 0x01000000 | “帮助”按钮 | HelpRole |
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| SaveAll | 0x00001000 | “保存全部”按钮 | AcceptRole |
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| Yes | 0x00004000 | “是”按钮 | YesRole |
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| YesToAll | 0x00008000 | “全部选是”按钮 | YesRole |
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| No | 0x00010000 | “否”按钮 | NoRole |
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| NoToAll | 0x00020000 | “全部选否”按钮 | NoRole |
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| Abort | 0x00040000 | “中止”按钮 | RejectRole |
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| Retry | 0x00080000 | “重试”按钮 | AcceptRole |
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| Ignore | 0x00100000 | “忽略”按钮 | AcceptRole |
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| NoButton | 0x00000000 | 无效的按钮 | - |

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