qt::setfocus

在Qt中，setFocus()函数用于将焦点设置到一个小部件上，无论其焦点策略如何。但是，它不会清除任何键盘抓取。\[2\]如果你想在自定义的QWidget中设置焦点，你可以重写focusInEvent()和focusOutEvent()函数。例如，你可以在focusInEvent()函数中调用setFocus()来将焦点设置到子小部件上。\[1\]另外，你还可以在重写的focusInEvent()和focusOutEvent()函数中发出自定义的信号，以便在焦点变化时执行其他操作。\[3\]
#### 引用[.reference_title]
- *1* [Qt setFocus无法生效问题](https://blog.csdn.net/FengOLei/article/details/115006595)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down1,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [Qt setFocus](https://blog.csdn.net/Hodors/article/details/107028124)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down1,239^v3^insert_chatgpt"}} ] [.reference_item]
- *3* [Qt弹出式窗口、Qt::popup闪退问题、设置窗口无焦点问题](https://blog.csdn.net/qq_42108501/article/details/117166255)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down1,239^v3^insert_chatgpt"}} ] [.reference_item]
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