如何隐藏键盘打开时的浮动按钮(Android/iOS)？

InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(getWindow().getDecorView().getWindowToken(), 0);

android:windowSoftInputMode="stateAlwaysHidden"

func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
    textField.inputAccessoryView = UIView()
    return true
}

NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)

@objc func keyboardWillShow(notification: NSNotification) {
    // 隐藏浮动按钮的代码
}

@objc func keyboardWillHide(notification: NSNotification) {
    // 显示浮动按钮的代码
}