xcode 如果键盘在 ios 应用程序中可见，如何以编程方式检查 swift
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How to programaticly check with swift if keyboard is visible in ios app
提问by user2993422
In my app, I have a table view with text labels inside. When a user presses on one of the text labels, the keyboard is shown, but each time the table is reloading, the keyboard disappears. I want to add a check (when the table is reloading) to see if the keyboard is up, and if so , then to make it visible again after reloading is finished. My question is - how can I check if the keyboard is visible? any help will be appreciated. thanks
在我的应用程序中，我有一个带有文本标签的表格视图。当用户按下其中一个文本标签时，会显示键盘，但每次重新加载表格时，键盘都会消失。我想添加一个检查（当表重新加载时）以查看键盘是否已启动，如果是，则在重新加载完成后使其再次可见。我的问题是 - 如何检查键盘是否可见？任何帮助将不胜感激。谢谢
回答by Azat
There are UIKeyboardWillShowNotificationand UIKeyboardWillHideNotificationnotifications of NSNotificationCenter. Just subscribe to them
有UIKeyboardWillShowNotification和UIKeyboardWillHideNotification通知NSNotificationCenter。只需订阅他们
