以交互方式关闭键盘时如何检测键盘框架变化? [英] How to detect keyboard frame changes when dismiss the keyboard interactively?

问题描述

考虑这种情况，我有一个在情节提要中交互式设置键盘关闭的文本视图，因此当用户向下滚动并能够交互式关闭键盘时.我对底部的 textview 有限制，以确保它始终完全显示在视图上.

Consider this scenario, I have a textview with keyboard Dismiss interactively set in storyboard, so when user scroll down and able to dismiss keyboard interactively. I have constraints on the textview to bottom to make sure it is always fully displayed on the view.

当前的问题是，当用户逐渐向下滚动以关闭键盘时，我无法检测到键盘框架的变化.我尝试了 UIKeyboardWillHideNotification 和 UIKeyboardWillChangeFrameNotification，它们仅在键盘关闭后才被调用.

Current problem is, when user gradually scroll down to dismiss the keyboard, I can not detect the keyboard frame changes. I tried UIKeyboardWillHideNotification and UIKeyboardWillChangeFrameNotification, they were only called after the keyboard dismissed.

所以我的问题是，当以交互方式关闭键盘时，我们如何同时检测键盘框架的变化?

So my question is, how can we detect keyboard frame changes simultaneously when dismiss the keyboard interactively?

推荐答案

您不应更改 textView 高度以适合所有视图.相反 - 您应该更改 contentInset 字段，这样您的 textView 将保持相同的高度，并且您不必担心交互式键盘的跟踪框架.请参阅此处的答案:如何在出现键盘时滚动 UIScrollView?

You shouldn't change the textView height to fit all view. Instead - you should change contentInset field so your textView will stay the same height and you won't have to bother about tracking frame of the interactive keyboard. See answer here: How do I scroll the UIScrollView when the keyboard appears?

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